SYNTHESIS OF Nb3Sn BY SHOCK WAVES

Otto, G.; Reece, O. Y.; Roy, U.

doi:10.1063/1.1653476

Cited by 19 publications

(3 citation statements)

References 2 publications

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“…Specifically, the discovery of surface‐enhanced Raman scattering (SERS) greatly promoted the development and application of Raman spectroscopy 1–6. However, the mechanism of SERS is still a puzzle,7–15 even though there are two widely accepted mechanisms: the electromagnetic mechanism (EM) and chemical mechanism (CM). The difficulty in understanding the mechanism of SERS is that the two mechanisms are always coexistent.…”

Section: Introductionmentioning

confidence: 99%

First‐Layer Effect in Graphene‐Enhanced Raman Scattering

Ling

Zhang

2010

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229

181

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Graphene as a substrate for enhancing Raman scattering, called graphene-enhanced Raman scattering (GERS), has been reported in previous work. Herein, it is found that the "first-layer effect", which is widely used to explain the chemical-enhanced mechanism in surface-enhanced Raman scattering (SERS), exists in the GERS system. The Langmuir-Blodgett (LB) technique is used to construct mono- and multilayer ordered aggregates of protoporphyrin IX (PPP). Raman spectra of PPP with different layer numbers of the LB film on graphene are collected. The Raman signal from the first monolayer LB film of PPP has a larger contribution to the Raman enhancement than that from subsequent monolayers. Meanwhile, the Raman enhancement is dependent on the molecular configuration in contact with graphene, in which the functional group of PPP in direct contact with graphene has a stronger enhancement than other groups. These results reveal that GERS is strongly dependent on the distance between graphene and the molecule, which is convincing evidence that the Raman enhancement effect based on graphene belongs to the chemical-enhanced mechanism. This discovery provides a convenient system for the study of the chemical-enhanced mechanism and will benefit further understanding of SERS.

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Section: Introductionmentioning

confidence: 99%

First‐Layer Effect in Graphene‐Enhanced Raman Scattering

Ling

Zhang

2010

Small

229

181

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“…It was found that the amount of explosive necessary to initiate the chemical reaction is related to the reaction temperature under ordinary conditions [31, 321. Also exothermic reactions are possible under shock wave conditions. Superconductive materials were synthesized by means of shock waves, such as Nb& [33] and Nb3Si [34] using stochiometric mixtures of the constituents.…”

Section: Shock Wave Synthesismentioning

confidence: 99%

Explosive Compaction of Powders: Principle and Prospects

Prümmer¹

1989

Science of Sintering

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“…A large number of review articles have appeared on surface enhanced Raman spectroscopy (SERS) emphasizing the valuable information that this technique is now providing. Several of these reviews have dealt with the theoretical and mechanistic advances in this field (329)(330)(331)(332)(333) and others have given an overview of the current topics of interest to which this technique is now being applied (334)(335)(336)(337)(338). Other SERS reviews have dealt with subjects such as the observation of adsorbates (339), electrochemical applications (340), and SERS scattering by metal colloids (341)(342)(343).…”

Section: Resonance-enhanced and Surface-enhanced Raman Spectroscopymentioning

confidence: 99%