In-situ TEM Investigation on Reaction Mechanisms of Conversion Electrode Materials for Batteries
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Journal Article In-situ TEM Investigation on Reaction Mechanisms of Conversion Electrode Materials for Batteries Get access Dong Su Dong Su Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, United States Corresponding author: dsu@bnl.gov or free.sd@gmail.com Search for other works by this author on: Oxford Academic Google Scholar Microscopy and Microanalysis, Volume 25, Issue S2, 1 August 2019, Pages 1434–1435, https://doi.org/10.1017/S1431927619007906 Published: 01 August 2019Keywords:
National laboratory
Nanomaterials
Microanalysis
Center (category theory)
In a sudden burst of activity, the National Science Foundation (NSF), the US government's major arm for funding RD the Center for Discrete Mathematics and Theoretical Computer Science at Rutgers University in New Jersey, which is expected to receive $1 .8m in its first year of operation; the Center for High-Temperature Superconductivity at the University of Illinois, Urbana-Champaign, $4.3m; the Center for Particle Astrophysics at the University of California, Berkeley, $1 .8m; the Center for Photoinduced Charge Transfer at the University of Rochester in New York state, $1. 7m; the Center for Quantised Electronic Structures at the University of California, Santa Barbara; and the Center for Research on Parallel Computation at Rice University in Texas, $4. lm.
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With the development of in situ techniques inside transmission electron microscopes (TEMs), external fields and probes can be applied to the specimen. This development transforms the TEM specimen chamber into a nanolab, in which reactions, structures, and properties can be activated or altered at the nanoscale, and all processes can be simultaneously recorded in real time with atomic resolution. Consequently, the capabilities of TEM are extended beyond static structural characterization to the dynamic observation of the changes in specimen structures or properties in response to environmental stimuli. This extension introduces new possibilities for understanding the relationships between structures, unique properties, and functions of nanomaterials at the atomic scale. Based on the idea of setting up a nanolab inside a TEM, tactics for design of in situ experiments inside the machine, as well as corresponding examples in nanomaterial research, including in situ growth, nanofabrication with atomic precision, in situ property characterization, and nanodevice construction are presented.
Nanodevice
Nanomaterials
Characterization
Atomic units
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Nanomaterials
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Nanomaterials
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Silver nanomaterials have lots of peculiar and exciting physical and chemical properties that are different from massive silver, so the synthesis and applications of silver nanomaterials have attracted a great deal of attention in the last decade. Currently, all kinds of silver nanomaterials having different shapes and sizes have been synthesized by many ingenious methods, and silver nanomaterials have exhibited extensive application prospects in many fields especially in biomedical aspect. In this article, the controllable synthesis of silver nanomaterials including nanorods, nanowires, nanotubes, nanoprisms, nanoplates, nanodisks, nanospheres, and nanopolyhedrons, etc. are reviewed. Silver nanomaterials are most utilized in the form of nanoparticles, so the main biomedical applications of silver nanoparticles, such as antibacterial and antiviral applications, antitumor applications, biosensors and biological labels, optical imaging and imaging intensifier, are discussed. Although antibacterial applications are still the most important aspects of silver nanomaterials at present, antitumor, optical sensors and imaging applications of silver nanomaterials have also shown good potential perspectives. More biomedical applications of silver nanomaterials still need to be exploited for the future, and the biological safety of silver nanomaterials also should be paid enough attention before their practical applications.
Nanomaterials
Silver nanoparticle
Nanorod
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Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
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H2O2 sensing is required in various biological and industrial applications, for which electrochemical sensing is a promising choice among various sensing technologies. Electrodes and electrocatalysts strongly influence the performance of electrochemical H2O2 sensors. Significant efforts have been devoted to electrode nanostructural designs and nanomaterial-based electrocatalysts. Here, we review the design strategies for electrodes and electrocatalysts used in electrochemical H2O2 sensors. We first summarize electrodes in different structures, including rotation disc electrodes, freestanding electrodes, all-in-one electrodes, and representative commercial H2O2 probes. Next, we discuss the design strategies used in recent studies to increase the number of active sites and intrinsic activities of electrocatalysts for H2O2 redox reactions, including nanoscale pore structuring, conductive supports, reducing the catalyst size, alloying, doping, and tuning the crystal facets. Finally, we provide our perspectives on the future research directions in creating nanoscale structures and nanomaterials to enable advanced electrochemical H2O2 sensors in practical applications.
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