scholarly journals Probing the dynamics of plasmon-excited hexanethiol-capped gold nanoparticles by picosecond X-ray absorption spectroscopy

2014 ◽  
Vol 16 (42) ◽  
pp. 23157-23163 ◽  
Author(s):  
Flavio Zamponi ◽  
Thomas J. Penfold ◽  
Maarten Nachtegaal ◽  
Andrea Lübcke ◽  
Jochen Rittmann ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Absorption Spectroscopy ◽  
Optical Excitation ◽  
Au Nps ◽  
X Ray ◽  
X Ray Absorption

The onset of disorder 100 ps after optical excitation of small Au NPs was revealed by X-ray absorption spectroscopy.

scholarly journals Tandem X-ray absorption spectroscopy and scattering for in situ time-resolved monitoring of gold nanoparticle mechanosynthesis

2020 ◽  
Vol 56 (71) ◽  
pp. 10329-10332 ◽  
Author(s):  
Paulo F. M. de Oliveira ◽  
Adam A. L. Michalchuk ◽  
Ana Guilherme Buzanich ◽  
Ralf Bienert ◽  
Roberto M. Torresi ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Absorption Spectroscopy ◽  
Mechanochemical Synthesis ◽  
Time Resolved ◽  
X Ray ◽  
X Ray Absorption

A new tandem approach combines XRD and XANES for time-resolved in situ monitoring of the mechanochemical synthesis of gold nanoparticles.

Effect of gold nanoparticles on lead zinc niobate–barium titanate structure by X-ray absorption spectroscopy

2017 ◽  
Vol 520 (1) ◽  
pp. 196-201
Author(s):  
Phakkhananan Pakawanit ◽  
Rattikorn Yimnirun ◽  
Yongyut Laosiritaworn ◽  
Kanokwan Kanchiang
Keyword(s):  
Gold Nanoparticles ◽  
Barium Titanate ◽  
Absorption Spectroscopy ◽  
X Ray ◽  
Lead Zinc Niobate ◽  
Lead Zinc ◽  
X Ray Absorption

Temperature Determination of Resonantly Excited Plasmonic Branched Gold Nanoparticles by X-ray Absorption Spectroscopy

Small ◽  
2011 ◽  
pp. n/a-n/a ◽  
Author(s):  
Bieke Van de Broek ◽  
Didier Grandjean ◽  
Jesse Trekker ◽  
Jian Ye ◽  
Kris Verstreken ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Absorption Spectroscopy ◽  
X Ray ◽  
Temperature Determination ◽  
X Ray Absorption

scholarly journals X-ray Absorption Spectroscopy Unveils the Formation of Gold Nanoparticles in Corn

2009 ◽  
Vol 19 ◽  
pp. 76-81 ◽  
Author(s):  
Guadalupe De la Rosa ◽  
Jessica Torres ◽  
Jasón G. Parsons ◽  
José Ramón Peralta-Videa ◽  
Hiram Castillo-Michel ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Absorption Spectroscopy ◽  
Fold Increase ◽  
Coordination Shell ◽  
Gold Concentration ◽  
Uptake Capacity ◽  
Edge Structure ◽  
X Ray ◽  
Corn Seed ◽  
X Ray Absorption

In this study, X-ray absorption spectroscopy was used to determine the possible gold biotransformation by Zea mays (corn) var. Golden, germinated and grown in a medium spikedwith KAuCl4. In addition, the gold uptake capacity of corn assisted by thiourea and ammoniumthiocyanate was investigated. Results showed that up to 160 mg/L, gold did no treduce corn seed germination or plant growth. Both thiourea and ammonium thiocyanateresulted in a 6-fold increase of gold concentration in roots and thiourea promoted a 10-fold increase of gold concentration in shoots. X-ray absorption near edge structure studies demonstrated that approximately 91% of the gold present in plant samples was Au(0). Theremaining 9% was present as Au(III). In addition, extended X-ray absorption fi ne structureresults showed that in corn roots, the gold coordination number was around 9,5 neighboringgold atoms at approximately 2,86 Å, indicating an incomplete fi rst coordination shell,which imply the presence of a nano-phase. The results demonstrated that Z. mays was ableto produce gold nanoparticles with a size of 10,36 nm.

Bonding properties of thiolate-protected gold nanoclusters and structural analogs from X-ray absorption spectroscopy

2015 ◽  
Vol 4 (2) ◽  
Author(s):  
Daniel M. Chevrier ◽  
Rui Yang ◽  
Amares Chatt ◽  
Peng Zhang
Keyword(s):  
Gold Nanoparticles ◽  
Absorption Spectroscopy ◽  
Gold Nanoclusters ◽  
Gold Surface ◽  
Experimental Conditions ◽  
X Ray ◽  
Gold Core ◽  
Specific Analysis ◽  
Bonding Properties ◽  
X Ray Absorption

AbstractSubnanometer, atomically precise thiolate-protected gold nanoclusters represent an important advancement in our understanding of thiolate-protected gold nanoparticles and thiolate-gold chemistry. Aside from being a link between larger gold nanoparticles and small gold complexes, gold nanoclusters exhibit extraordinary molecule-like optical, electronic, and physicochemical properties that are promising for next-generation imaging agents, sensing devices, or catalysts. The success in elucidating a number of unique thiolate-gold surface and gold core structures has greatly improved our understanding of thiolate-gold nanoclusters. Nevertheless, monitoring the structural and electronic behavior of thiolate-protected gold nanoclusters in a variety of media or environments is crucial for the next step in advancing this class of nanomaterials. Not to mention, there are a number of thiolate-protected gold nanoclusters with unknown structures or compositions that could reveal important insights on application-based properties such as luminescence or catalytic activity. This review summarizes some of the recent contributions from X-ray absorption spectroscopy (XAS) studies on the intriguing bonding properties of thiolate-protected gold nanoclusters and some structural analogs. Advantages from XAS include a local structural, site- and element-specific analysis, suitable for ultra-small particle sizes (1–2 nm), along with versatile experimental conditions.

X-RAY ABSORPTION SPECTROSCOPY STUDY OF Cu-BASED METHANOL CATALYSTS. 2. REDUCED STATE

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-237-C8-242 ◽  
Author(s):  
B. S. CLAUSEN ◽  
B. LENGELER ◽  
B. S. RASMUSSEN ◽  
W. NIEMANN ◽  
H. TOPSØE
Keyword(s):  
Absorption Spectroscopy ◽  
Spectroscopy Study ◽  
X Ray ◽  
X Ray Absorption ◽  
Reduced State
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