21 Jul 15:16
by Xiujun Yue,
Alissa C. Johnson,
Sungbong Kim,
Ryan R. Kohlmeyer,
Arghya Patra,
Jessica Grzyb,
Akaash Padmanabha,
Min Wang,
Zhimin Jiang,
Pengcheng Sun,
Chadd T. Kiggins,
Mehmet N. Ates,
Sonika V. Singh,
Evan M. Beale,
Mark Daroux,
Aaron J. Blake,
John B. Cook,
Paul V. Braun,
James H. Pikul
Billions of internet-connected devices require microbattery power sources, but their operating times are severely limited by the poor scaling of battery energy density. This work presents a new design paradigm for primary microbatteries that drastically improves energy and power density by eliminating the majority of packaging and using thick and dense electrodes with controlled crystal orientation for fast transport.
Abstract
Billions of internet connected devices used for medicine, wearables, and robotics require microbattery power sources, but the conflicting scaling laws between electronics and energy storage have led to inadequate power sources that severely limit the performance of these physically small devices. Reported here is a new design paradigm for primary microbatteries that drastically improves energy and power density by eliminating the vast majority of the packaging and through the use of high-energy-density anode and cathode materials. These light (50–80 mg) and small (20–40 µL) microbatteries are enabled though the electroplating of 130 µm-thick 94% dense additive-free and crystallographically oriented LiCoO2 onto thin metal foils, which also act as the encapsulation layer. These devices have 430 Wh kg−1 and 1050 Wh L−1 energy densities, 4 times the energy density of previous similarly sized microbatteries, opening up the potential to power otherwise unpowerable microdevices.
15 Jul 15:45
by Haonan Zheng,
Runjiang Shen,
Huikai Zhong,
Yanghua Lu,
Xutao Yu,
Shisheng Lin
A direct current dynamic diode generator (DC-DDG) is demonstrated, with a significantly enhanced direct electricity output under 77K compared to room temperature. This is a promising solution for a self-powered information device, which can also act as a reliable in situ energy collector under the extremely cold environment such as the south/north poles.
Abstract
In situ energy supply method has a high demand for the various distributed devices in the fast-developing Internet of Things. Harvesting energy from the environment that converts mechanical energy into electricity has emerged as a promising candidate for in situ energy network. However, although hardly achieved, electricity is much more desired under low temperature environments, such as the north pole or on Mars. Here, it is reported that the dynamic Schottky diode can work well under a low temperature of 77 K, while the electricity output can be greatly increased compared with that at room temperature. The voltage and current output can be increased to 1.21 V and 11.38 µA compared to 0.76 V and 4.86 µA at room temperature, the higher carrier mobility at a lower temperature is responsible for this improvement. This research passes the way for power generation in some extreme cold areas, which can further promote the practical application of dynamic diode generators.
16 Feb 12:33
Nanoscale, 2021, 13,5489-5496
DOI: 10.1039/D0NR08415H, Paper
Zhiwei Wang, Xiang Wang, Qian Chen, Xiaoshan Wang, Xiao Huang, Wei Huang
The controllable preparation of SnS@NbS2 core@shell and SnS/NbS2 lateral heterostructures were both realized by controlling the reaction kinetics and thus the nucleation and growth sequence of p-type SnS and metallic NbS2.
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24 Nov 14:05
by Jinwoo Lee,
Dongkwan Kim,
Heayoun Sul,
Seung Hwan Ko
Virtual and augmented realities (VR/AR) reproduce the simulated environment in which the user can freely interact with the virtual world. However, most of the VR/AR devices developed to date lack thermal haptic modules, although heat transfer constantly occurs in our daily lives. Therefore, this review examines thermal mechanisms and functional materials to fabricate thermo‐haptic devices and enhance thermal VR/AR devices.
Abstract
The current generation of virtual and augmented realities (VR/AR) has substantially advanced in the past decade because of the rapid development of converging technologies in various engineering and scientific fields. However, the current VR/AR technologies rely mainly on visual and auditory senses to physically replicate the virtual environment, although tactile senses play a significant role in the daily life since a myriad of tactile information is received through physical touch. Of the tactile senses, thermal senses are of great importance to be reproduced in the VR/AR field, since heat is transferred constantly and further interact with the surrounding environment. To date, there has been a huge amount of research studies on functional materials, thermo‐haptic devices, and wearable electronics that have all converged to form the fundamental groundwork for the development of wearable thermal VR/AR devices. In this progress report, a review on various physical mechanisms and research is provided that can potentially be applied in the next generation of thermal VR/AR technologies and discuss the essential challenges that need to be addressed.
24 Nov 12:04
by Taimur Ahmed,
Muhammad Tahir,
Mei Xian Low,
Yanyun Ren,
Sherif Abdulkader Tawfik,
Edwin L. H. Mayes,
Sruthi Kuriakose,
Shahid Nawaz,
Michelle J. S. Spencer,
Hua Chen,
Madhu Bhaskaran,
Sharath Sriram,
Sumeet Walia
An all‐optically tunable neuromorphic imaging element based on black phosphorus (BP) is demonstrated. Unusual wavelength‐dependent photocurrent in BP is harnessed to optically program and erase visual memory elements. Concurrently, the same elements are capable of in‐pixel image pre‐processing in an array and optoelectronic machine learning for image recognition through artificial neural networks.
Abstract
Imprinting vision as memory is a core attribute of human cognitive learning. Fundamental to artificial intelligence systems are bioinspired neuromorphic vision components for the visible and invisible segments of the electromagnetic spectrum. Realization of a single imaging unit with a combination of in‐built memory and signal processing capability is imperative to deploy efficient brain‐like vision systems. However, the lack of a platform that can be fully controlled by light without the need to apply alternating polarity electric signals has hampered this technological advance. Here, a neuromorphic imaging element based on a fully light‐modulated 2D semiconductor in a simple reconfigurable phototransistor structure is presented. This standalone device exhibits inherent characteristics that enable neuromorphic image pre‐processing and recognition. Fundamentally, the unique photoresponse induced by oxidation‐related defects in 2D black phosphorus (BP) is exploited to achieve visual memory, wavelength‐selective multibit programming, and erasing functions, which allow in‐pixel image pre‐processing. Furthermore, all‐optically driven neuromorphic computation is demonstrated by machine learning to classify numbers and recognize images with an accuracy of over 90%. The devices provide a promising approach toward neurorobotics, human–machine interaction technologies, and scalable bionic systems with visual data storage/buffering and processing.
09 Nov 14:49
by Yufei Zhang,
Edison Huixiang Ang,
Yang Yang,
Minghui Ye,
Wencheng Du,
Cheng Chao Li
Interlayer engineering has emerged as a powerful approach for tailoring layered electrodes with flexible structures, tunable properties, and multiple active sites for secondary batteries and supercapacitors. This review highlights various tactics for interlayer engineering and explores their induced effects on electrochemical performance. Finally, the challenges and outlook for future work are also presented.
Abstract
With the constant focus on energy storage devices, layered materials are ideal electrodes for the new generation of highly efficient secondary ion batteries and supercapacitors due to their flexible 2D structures and high theoretical capacities. However, the small interlayer distances in layered electrode materials and the strong Columbic interactions between the working ions and host lattice anions cause slow ion diffusion. In addition, structural collapse during repeated ion insertion and extraction reduces the cycling lifetime. As such, interlayer engineering strategies are effective approaches to optimize ion transmission kinetics and structural integrity. In view of the latest research on the interlayer engineering of layered materials, this review will discuss useful strategies to improve electrode performance. The synthetic strategies, characterization techniques, and effects of interlayer‐engineered layered materials, including metal oxides, metal sulfides, carbonous materials, and MXenes, are discussed in detail. The future outlook and challenges for interlayer engineering are also presented, which may pave the way for the development of new layered materials.
07 Oct 14:24
by Endre Horváth,
Lídia Rossi,
Cyprien Mercier,
Caroline Lehmann,
Andrzej Sienkiewicz,
László Forró
In TiO2 nanowire‐based filters, the high dielectric constant of TiO2 enhances the wettability by the water droplets carrying the bacteria or viruses. Upon UV illumination, reactive oxygen species (e.g., OH., O2
−., H2O2) are created, which destroy the germs. Such a filter is suitable for reusable personal protective mask, for a new generation of air conditioners and air purifiers.
Abstract
In the last couple decades, several viral outbreaks resulting in epidemics and pandemics with thousands of human causalities have been witnessed. The current Covid‐19 outbreak represents an unprecedented crisis. In stopping the virus’ spread, it is fundamental to have personal protective equipment and disinfected surfaces. Here, the development of a TiO2 nanowires (TiO2NWs) based filter is reported, which it is believed will work extremely well for personal protective equipment (PPE), as well as for a new generation of air conditioners and air purifiers. Its efficiency relies on the photocatalytic generation of high levels of reactive oxygen species (ROS) upon UV illumination, and on a particularly high dielectric constant of TiO2, which is of paramount importance for enhanced wettability by the water droplets carrying the germs. The filter pore sizes can be tuned by processing TiO2NWs into filter paper. The kilogram‐scale production capability of TiO2NWs gives credibility to its massive application potentials.
07 Oct 12:14
J. Mater. Chem. A, 2020, Advance Article
DOI: 10.1039/D0TA05598K, Paper
Babu Ram, Hiroshi Mizuseki
The great success of graphene has triggered an enormous amount of interest in the search for new 2D materials.
To cite this article before page numbers are assigned, use the DOI form of citation above.
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07 Oct 12:05
Nanoscale, 2020, Accepted Manuscript
DOI: 10.1039/D0NR05682K, Paper
Benoit Campeon, Wang Chen, Yuta Nishina
This study examines the synthesis and electrochemical performance of three-dimensional graphene for use as Li-ion batteries and Na-ion batteries. The in-situ formation of iron hydroxide nanoparticles (Fe(OH)x NPs) of various...
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28 Sep 10:57
by Yang Hu, Yuqi Zhang, Tong Chen, Dongpeng Yang, Dekun Ma, and Shaoming Huang
ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.0c12229
23 Sep 15:38
by Ruoyu Cheng, Flavia Fontana, Junyuan Xiao, Zehua Liu, Patrícia Figueiredo, Mohammad-Ali Shahbazi, Shiqi Wang, Jing Jin, Giulia Torrieri, Jouni T. Hirvonen, Hongbo Zhang, Tongtong Chen, Wenguo Cui, Yong Lu, and Hélder A. Santos
ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.0c15057
16 Sep 10:32
J. Mater. Chem. A, 2020, 8,20658-20665
DOI: 10.1039/D0TA06937J, Paper
Jae Yu Cho, SeongYeon Kim, Raju Nandi, Junsung Jang, Hee-Sun Yun, Enkhjargal Enkhbayar, Jin Hyeok Kim, Doh-Kwon Lee, Choong-Heui Chung, JunHo Kim, Jaeyeong Heo
The highest efficiency of 4.225% for vapor-transport-deposited SnS absorber/CdS heterojunction solar cells with good long-term stability over two years is achieved.
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16 Sep 09:40
Nanoscale, 2020, 12,19814-19823
DOI: 10.1039/D0NR04537C, Paper
Jian Mao, Orlando Ortiz, Junjia Wang, Alexandre Malinge, Antonella Badia, Stéphane Kéna-Cohen
Langmuir-Blodgett assembly is used to fabricate centimeter-scale thin films of semiconducting black phosphorus. To demonstrate the technique’s potential, the films are used as active layers in large area solution-processed photodetectors.
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16 Sep 09:36
Nanoscale, 2020, 12,20089-20099
DOI: 10.1039/D0NR05204C, Review Article
Da Wan, Hao Huang, Zhongzheng Wang, Xingqiang Liu, Lei Liao
Two-dimensional black phosphorus (BP) presents extensive exciting properties attributed to the high mobility and non-dangling bonds uniform surface with simultaneously obtained atomically ultrathin body.
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04 Sep 09:31
by Yutang Kang, Shihui Jiao, Boran Wang, Xinyan Lv, Wenwen Wang, Wen Yin, Zhenwei Zhang, Qi zhang, Yumei Tan, and Guangsheng Pang*
ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.0c11266
01 Sep 11:05
J. Mater. Chem. A, 2020, Advance Article
DOI: 10.1039/D0TA07180C, Paper
Xiao Xu, Lu Xu, Junxuan Ao, Yulin Liang, Cheng Li, Yangjie Wang, Chen Huang, Feng Ye, Qingnuan Li, Xiaojing Guo, Jingye Li, Hengti Wang, Shengqian Ma, Hongjuan Ma
Easy placement, salvageability, low-cost, and ultrahigh uranium capacity AO-OpNpNc fibers are a far more realistic means of massive uranium extraction from seawater.
To cite this article before page numbers are assigned, use the DOI form of citation above.
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03 Aug 09:07
by Yi Zhu,
Mayur Birla,
Kenn R. Oldham,
Evgueni T. Filipov
An elastically and plastically foldable micro‐origami is developed and tested to create controllable and functional 3D shape morphing systems with multiple active degrees of freedom. The work demonstrates a versatile design–fabrication–actuation method to achieve rapid folding, enhanced control, and function in different atmospheric environments, enabling applications in microrobots, medical devices, and metamaterials.
Abstract
Integrating origami principles within traditional microfabrication methods can produce shape morphing microscale metamaterials and 3D systems with complex geometries and programmable mechanical properties. However, available micro‐origami systems usually have slow folding speeds, provide few active degrees of freedom, rely on environmental stimuli for actuation, and allow for either elastic or plastic folding but not both. This work introduces an integrated fabrication–design–actuation methodology of an electrothermal micro‐origami system that addresses the above‐mentioned challenges. Controllable and localized Joule heating from electrothermal actuator arrays enables rapid, large‐angle, and reversible elastic folding, while overheating can achieve plastic folding to reprogram the static 3D geometry. Because the proposed micro‐origami do not rely on an environmental stimulus for actuation, they can function in different atmospheric environments and perform controllable multi‐degrees‐of‐freedom shape morphing, allowing them to achieve complex motions and advanced functions. Combining the elastic and plastic folding enables these micro‐origami to first fold plastically into a desired geometry and then fold elastically to perform a function or for enhanced shape morphing. The proposed origami systems are suitable for creating medical devices, metamaterials, and microrobots, where rapid folding and enhanced control are desired.
06 Jul 10:18
by Feichen Yang,
Jiacheng Zhao,
William J. Koshut,
John Watt,
Jonathan C. Riboh,
Ken Gall,
Benjamin J. Wiley
The first hydrogel with the same strength and modulus as cartilage under tension and compression is developed by reinforcing a double network hydrogel with bacterial cellulose. Compared to cartilage, the hydrogel exhibits the same time‐dependent strain under compression, has the same tensile fatigue strength at 100 000 cycles, has a coefficient of friction 45% lower, and is more wear‐resistant.
Abstract
This article reports the first hydrogel with the strength and modulus of cartilage in both tension and compression, and the first to exhibit cartilage‐equivalent tensile fatigue strength at 100 000 cycles. These properties are achieved by infiltrating a bacterial cellulose (BC) nanofiber network with a poly(vinyl alcohol) (PVA)–poly(2‐acrylamido‐2‐methyl‐1‐propanesulfonic acid sodium salt) (PAMPS) double network hydrogel. The BC provides tensile strength in a manner analogous to collagen in cartilage, while the PAMPS provides a fixed negative charge and osmotic restoring force similar to the role of aggrecan in cartilage. The hydrogel has the same aggregate modulus and permeability as cartilage, resulting in the same time‐dependent deformation under confined compression. The hydrogel is not cytotoxic, has a coefficient of friction 45% lower than cartilage, and is 4.4 times more wear‐resistant than a PVA hydrogel. The properties of this hydrogel make it an excellent candidate material for replacement of damaged cartilage.
06 Jul 10:07
by Bingqiao Wang†‡, Yang Wu‡§, Ying Liu*†, Youbin Zheng‡§, Yupeng Liu‡§, Chenguang Xu†‡, Xiang Kong†‡, Yange Feng‡§, Xiaolong Zhang‡?, and Daoai Wang*‡§
ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.0c03843
06 Jul 09:33
J. Mater. Chem. A, 2020, 8,13619-13629
DOI: 10.1039/D0TA03416A, Paper
Asif Abdullah Khan, Md Masud Rana, Guangguang Huang, Nanqin Mei, Resul Saritas, Boyu Wen, Steven Zhang, Peter Voss, Eihab-Abdel Rahman, Zoya Leonenko, Shariful Islam, Dayan Ban
A high-performance perovskite/polymer piezoelectric nanogenerator for next generation self-powered wireless micro/nanodevices.
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29 Jun 10:17
by Jialuo Han†, Jianbo Tang†, Shuhada A. Idrus-Saidi†, Michael J. Christoe†, Anthony P. O’Mullane‡, and Kourosh Kalantar-Zadeh*†
ACS Applied Materials & Interfaces
DOI: 10.1021/acsami.0c07697
29 Jun 09:27
Nanoscale, 2020, 12,14222-14229
DOI: 10.1039/D0NR02159H, Paper
Ievgen S. Donskyi, Ying Chen, Philip Nickl, Guy Guday, Haishi Qiao, Katharina Achazi, Andreas Lippitz, Wolfgang E. S. Unger, Christoph Böttcher, Wei Chen, Mohsen Adeli, Rainer Haag
Enzyme-functionalized, doxorubicin-loaded, self-degradable graphene nanoplatforms show high antitumor activity, due to synergistic photothermal- and chemotherapy along with neutrophil-like activity.
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22 Jun 09:37
Nanoscale, 2020, 12,14689-14698
DOI: 10.1039/D0NR02604B, Paper
Yemao Lin, Xiaodong Guo, Mingjun Hu, Bin Liu, Yucheng Dong, Xin Wang, Neng Li, Hong-En Wang
A MoS2@SnS heterostructure can serve as an advanced anode for sodium-ion batteries with enhanced reaction kinetics.
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15 Jun 09:49
by Ivan I. Smalyukh
A summary of how nanocellulose can be used to fabricate bioinspired building materials, including thermally super‐insulating transparent and translucent aerogels and designable photonic reflectors, like the ones found in cuticles of beetles, is presented. These materials promise a boost of the energy efficiency of building envelopes, especially windows, so that no or very little supplemental energy would be needed to provide year‐round occupant comfort.
Abstract
One of the grand current research challenges is to improve the energy efficiency of residential and commercial buildings, which cumulatively consume more than 40% of the energy generated globally. In addition to improving the comfort of the inhabitants and mitigating the growing energy consumption problem, new building materials and technologies could provide a safe strategy for geoengineering to mitigate global climate change. Herein, recent progress in developing such advanced materials from nanocellulose, which is often derived from wood or even dirty feedstocks like waste, is reviewed. By using chemical and bacteria‐enabled processing, nanocellulose can be used to fabricate broadband photonic reflectors, thermally super‐insulating aerogels, solar gain regulators, and low‐emissivity coatings, with potential applications in windows, roofs, walls, and other components of buildings envelopes. These material developments draw inspiration from advanced energy management found in nature, such as the nanoporous photonic structures that evolved in cuticles of beetles. Fabrication of such materials takes advantage of mesoscale liquid crystalline self‐assembly, which allows for pre‐designed control of cellulose nanoparticle orientations at the mesoscale. With the potential fully realized, such materials could one day transform the current energy‐lossy buildings into energy plants on Earth and possibly even enable extraterrestrial habitats.
15 Jun 09:47
by Xia Liu,
Samuel Tobias Howell,
Ana Conde‐Rubio,
Giovanni Boero,
Juergen Brugger
A thermomechanical lithography technique for direct nanocutting of 2D materials is demonstrated. A heated scanning nanotip performs the cutting of the 2D material by thermomechanically cleaving the chemical bonds in concert with the rapid sublimation of the polymer layer underneath. A resolution of 20 nm is obtained in monolayer MoTe2, MoS2, and MoSe2.
Abstract
Atomically thin materials, such as graphene and transition metal dichalcogenides, are promising candidates for future applications in micro/nanodevices and systems. For most applications, functional nanostructures have to be patterned by lithography. Developing lithography techniques for 2D materials is essential for system integration and wafer‐scale manufacturing. Here, a thermomechanical indentation technique is demonstrated, which allows for the direct cutting of 2D materials using a heated scanning nanotip. Arbitrarily shaped cuts with a resolution of 20 nm are obtained in monolayer 2D materials, i.e., molybdenum ditelluride (MoTe2), molybdenum disulfide (MoS2), and molybdenum diselenide (MoSe2), by thermomechanically cleaving the chemical bonds and by rapid sublimation of the polymer layer underneath the 2D material layer. Several micro/nanoribbon structures are fabricated and electrically characterized to demonstrate the process for device fabrication. The proposed direct nanocutting technique allows for precisely tailoring nanostructures of 2D materials with foreseen applications in the fabrication of electronic and photonic nanodevices.
08 Jun 13:34
by Robert W. Epps,
Michael S. Bowen,
Amanda A. Volk,
Kameel Abdel‐Latif,
Suyong Han,
Kristofer G. Reyes,
Aram Amassian,
Milad Abolhasani
Fully autonomous colloidal synthesis studies implementing a self‐driving microfluidic platform with machine‐learning‐based experiment selection achieve unassisted material exploration. Halide‐exchanged cesium lead bromide quantum dots are optimized simultaneously for photoluminescence quantum yield, polydispersity, and peak emission energy, independent of user intervention. Eleven target emissions are reached within 30 h and 210 mL of starting quantum dots and without prior knowledge.
Abstract
The optimal synthesis of advanced nanomaterials with numerous reaction parameters, stages, and routes, poses one of the most complex challenges of modern colloidal science, and current strategies often fail to meet the demands of these combinatorially large systems. In response, an Artificial Chemist is presented: the integration of machine‐learning‐based experiment selection and high‐efficiency autonomous flow chemistry. With the self‐driving Artificial Chemist, made‐to‐measure inorganic perovskite quantum dots (QDs) in flow are autonomously synthesized, and their quantum yield and composition polydispersity at target bandgaps, spanning 1.9 to 2.9 eV, are simultaneously tuned. Utilizing the Artificial Chemist, eleven precision‐tailored QD synthesis compositions are obtained without any prior knowledge, within 30 h, using less than 210 mL of total starting QD solutions, and without user selection of experiments. Using the knowledge generated from these studies, the Artificial Chemist is pre‐trained to use a new batch of precursors and further accelerate the synthetic path discovery of QD compositions, by at least twofold. The knowledge‐transfer strategy further enhances the optoelectronic properties of the in‐flow synthesized QDs (within the same resources as the no‐prior‐knowledge experiments) and mitigates the issues of batch‐to‐batch precursor variability, resulting in QDs averaging within 1 meV from their target peak emission energy.
08 Jun 13:31
by Jinchen Fan,
Nicholas A. Kotov
Chiral nanoceramics are emerging as a remarkably active area of chiral research. It is still in its infant stage and is thus full of challenges and opportunities. Recent advances in the diversity of chemistries, geometries, and properties of chiral ceramic nanostructures are reviewed. An outlook of synthesis, computational methods, and emerging applications of chiral nanoceramics is presented.
Abstract
The study of different chiral inorganic nanomaterials has been experiencing rapid growth during the past decade, with its primary focus on metals and semiconductors. Ceramic materials can substantially expand the range of mechanical, optical, chemical, electrical, magnetic, and biological properties of chiral nanostructures, further stimulating theoretical, synthetic, and applied research in this area. An ever‐expanding toolbox of nanoscale engineering and self‐organization provides a chirality‐based methodology for engineering of hierarchically organized ceramic materials. However, fundamental discoveries and technological translations of chiral nanoceramics have received substantially smaller attention than counterparts from metals and semiconductors. Findings in this research area are scattered over a variety of sources and subfields. Here, the diversity of chemistries, geometries, and properties found in chiral ceramic nanostructures are summarized. They represent a compelling materials platform for realization of chirality transfer through multiple scales that can result in new forms of ceramic materials. Multiscale chiral geometries and the structural versatility of nanoceramics are complemented by their high chiroptical activity, enantioselectivity, catalytic activity, and biocompatibility. Future development in this field is likely to encompass chiral synthesis, biomedical applications, and optical/electronic devices. The implementation of computationally designed chiral nanoceramics for biomimetic catalysts and quantum information devices may also be expected.
08 Jun 13:25
by Tahereh Nematiaram,
Daniele Padula,
Alessandro Landi,
Alessandro Troisi
The physical parameters relevant for charge transport are evaluated for ≈5000 known molecular semiconductors extracted from the Cambridge Structural Database and the expected charge mobility is computed. A number of potential high mobility semiconductors are found and, by studying the distribution of such parameters, the physical limit to the charge mobility achievable within this materials class is predicted.
Abstract
A large database of known molecular semiconductors is used to define a plausible physical limit to the charge carrier mobility achievable within this materials class. From a detailed study of the desirable properties in a large dataset, it is possible to establish whether such properties can be optimized independently and what would be a reasonably achievable optimum for each of them. All relevant parameters are computed from a set of almost five thousand known molecular semiconductors, finding that the best known materials are not ideal with respect to all properties. These parameters in decreasing order of importance are the molecular area, the nonlocal electron–phonon coupling, the 2D nature of transport, the local electron–phonon coupling, and the highest transfer integral. It is also found that the key properties related to the charge transport are either uncorrelated or “constructively” correlated (i.e., they improve together) concluding that a tenfold increase in mobility is within reach in a statistical sense, on the basis of the available data. It is demonstrated that high throughput screenings, when coupled with physical models of transport produce both specific target materials and a more general physical understanding of the materials space.
22 May 08:28
Nanoscale, 2020, 12,11440-11447
DOI: 10.1039/C9NR10831A, Communication
Open Access
Hui Ding, Suelen Barg, Brian Derby
3D printed graphene with capillary suspensions require lower concentrations of additives to produce high conductivity constructs.
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18 May 09:27
Nanoscale, 2020, 12,11703-11710
DOI: 10.1039/D0NR03305G, Paper
Siyang Zhao, Lu Tie, Zhiguang Guo, Jing Li
Lubricating oil failure caused by water is solved by a robust membrane that shows steady performance in regard to extreme water repellency, high-efficiency purification of lubricating oils, and low wear volume even after harsh mechanical damage.
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