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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Tandem X-ray absorption spectroscopy and scattering forin situtime-resolved monitoring of gold nanoparticle mechanosynthesis

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Author(s):
de Oliveira, Paulo F. M. [1, 2] ; Michalchuk, Adam A. L. [1] ; Buzanich, Ana Guilherme [1] ; Bienert, Ralf [1] ; Torresi, Roberto M. [2] ; Camargo, Pedro H. C. [3, 2] ; Emmerling, Franziska [1]
Total Authors: 7
Affiliation:
[1] BAM Fed Inst Mat Res & Testing, Richard Willstatter Str 11, D-12489 Berlin - Germany
[2] Univ Sao Paulo, Inst Quim, Av Lineu Prestes 748, BR-05508000 Sao Paulo - Brazil
[3] Univ Helsinki, Dept Chem, AI Virtasen Aukio 1, Helsinki - Finland
Total Affiliations: 3
Document type: Journal article
Source: CHEMICAL COMMUNICATIONS; v. 56, n. 71, p. 10329-10332, SEP 14 2020.
Web of Science Citations: 0
Abstract

Current time-resolvedin situapproaches limit the scope of mechanochemical investigations possible. Here we develop a new, general approach to simultaneously follow the evolution of bulk atomic and electronic structure during a mechanochemical synthesis. This is achieved by coupling two complementary synchrotron-based X-ray methods: X-ray absorption spectroscopy (XAS) and X-ray diffraction. We apply this method to investigate the bottom-up mechanosynthesis of technologically important Au micro and nanoparticles in the presence of three different reducing agents, hydroquinone, sodium citrate, and NaBH4. Moreover, we show how XAS offers new insight into the early stage generation of growth species (e.g.monomers and clusters), which lead to the subsequent formation of nanoparticles. These processes are beyond the detection capabilities of diffraction methods. This combined X-ray approach paves the way to new directions in mechanochemical research of advanced electronic materials. (AU)

FAPESP's process: 15/26308-7 - Optimization of the physicochemical properties of nano -structured materials for applications in molecular recognition, catalysis and energy conversion/storage
Grantee:Roberto Manuel Torresi
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 17/15456-0 - Solid-state mechanochemistry as a greener route for synthesis of advanced materials
Grantee:Paulo Filho Marques de Oliveira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 19/01619-0 - Elucidating the mechanisms of noble metal nanoparticles formation in solid-state mechanochemical ball milling conditions using in situ techniques
Grantee:Paulo Filho Marques de Oliveira
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor