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UFN, 2017, Volume 187, Number 12, Pages 1329–1364 (Mi ufn5854)  

This article is cited in 2 scientific papers (total in 2 papers)

REVIEWS OF TOPICAL PROBLEMS

Metal nanostructures: from clusters to nanocatalysis and sensors

B. M. Smirnov

Joint Institute for High Temperatures, Russian Academy of Sciences, Moscow

Abstract: The properties of metal clusters and nanostructures composed of them are reviewed. Various existing methods for the generation of intense beams of metal clusters and their subsequent conversion into nanostructures are compared. Processes of the flow of a buffer gas with active molecules through a nanostructure are analyzed as a basis of using nanostructures for catalytic applications. The propagation of an electric signal through a nanostructure is studied by analogy with a macroscopic metal. An analysis is given of how a nanostructure changes its resistance as active molecules attach to its surface and are converted into negative ions. These negative ions induce the formation of positively charged vacancies inside the metal conductor and attract the vacancies to together change the resistance of the metal nanostructure. The physical basis is considered for using metal clusters and nanostructures composed of them to create new materials in the form of a porous metal film on the surface of an object. The fundamentals of nanocatalysis are reviewed. Semiconductor conductometric sensors consisting of bound nanoscale grains or fibers acting as a conductor are compared with metal sensors conducting via a percolation cluster, a fractal fiber, or a bunch of interwoven nanofibers formed in superfluid helium. It is shown that sensors on the basis of metal nanostructures are characterized by a higher sensitivity than semiconductor ones, but are not selective. Measurements using metal sensors involve two stages, one of which measures to high precision the attachment rate of active molecules to the sensor conductor, and in the other one the surface of metal nanostructures is cleaned from the attached molecules using a gas discharge plasma (in particular, capillary discharge) with a subsequent chromatography analysis for products of cleaning.

Funding Agency Grant Number
Russian Science Foundation 14-50-00124
This paper was supported by a grant from Russian Science Foundation (grant 14-50-00124).


DOI: https://doi.org/10.3367/UFNr.2017.02.038073

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English version:
Physics–Uspekhi, 2017, 60:12, 1236–1267

Bibliographic databases:

PACS: 61.43.Hv, 61.46.-w, 72.15.-v, 73.63.-b
Received: November 17, 2016
Revised: February 11, 2017
Accepted: February 14, 2017

Citation: B. M. Smirnov, “Metal nanostructures: from clusters to nanocatalysis and sensors”, UFN, 187:12 (2017), 1329–1364; Phys. Usp., 60:12 (2017), 1236–1267

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    Citing articles on Google Scholar: Russian citations, English citations
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    This publication is cited in the following articles:
    1. Gordon E.B. Kulish M.I. Karabulin A.V. Matyushenko V.I. Stepanov M.E., “Optical Radiation Accompanying Metal Nanoparticles Coagulation in Superfluid Helium”, J. Quant. Spectrosc. Radiat. Transf., 222 (2019), 180–185  crossref  isi  scopus
    2. Bykov N.Y., Gorbachev Yu.E., “Cluster Formation in Copper Vapor Jet Expanding Into Vacuum: the Direct Simulation Monte Carlo”, Vacuum, 163 (2019), 119–127  crossref  isi  scopus
  • Успехи физических наук Physics-Uspekhi
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