Effects of adsorbed water on plasmon-based dissolution, redeposition and resulting spectral changes of Ag nanoparticles on single-crystalline TiO2

2008 ◽  
Vol 10 (16) ◽  
pp. 2263 ◽  
Author(s):  
Kazuki Matsubara ◽  
K. Lance Kelly ◽  
Nobuyuki Sakai ◽  
Tetsu Tatsuma
Keyword(s):  
Ag Nanoparticles ◽  
Adsorbed Water ◽  
Single Crystalline ◽  
Spectral Changes

scholarly journals When More Is Less: Plastic Weakening of Single Crystalline Ag Nanoparticles by the Polycrystalline Au Shell

ACS Nano ◽  
2021 ◽  
Author(s):  
Amit Sharma ◽  
Jonathan Amodeo ◽  
Nimrod Gazit ◽  
Yuanshen Qi ◽  
Olivier Thomas ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Single Crystalline

Improved SERS performance of single-crystalline TiO2 nanosheet arrays with coexposed {001} and {101} facets decorated with Ag nanoparticles

2017 ◽  
Vol 242 ◽  
pp. 932-939 ◽  
Author(s):  
Lei Yang ◽  
Weihua Wang ◽  
Haiyan Jiang ◽  
Qianghua Zhang ◽  
Huihui Shan ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Single Crystalline ◽  
Nanosheet Arrays

Bi- and Uniaxially Oriented Growth and Plasmon Resonance Properties of Anisotropic Ag Nanoparticles on Single Crystalline TiO2 Surfaces

2009 ◽  
Vol 113 (12) ◽  
pp. 4758-4762 ◽  
Author(s):  
Emiko Kazuma ◽  
Kazuki Matsubara ◽  
K. Lance Kelly ◽  
Nobuyuki Sakai ◽  
Tetsu Tatsuma
Keyword(s):  
Plasmon Resonance ◽  
Ag Nanoparticles ◽  
Oriented Growth ◽  
Single Crystalline ◽  
Resonance Properties

“Preparation of Single Crystalline Gold Films for ED Studies”

1972 ◽  
Vol 30 ◽  
pp. 634-635
Author(s):  
Joseph D. C. Peng
Keyword(s):  
Crystal Morphology ◽  
Diffraction Theory ◽  
Scattering Matrix ◽  
Vacuum Evaporation ◽  
Gold Films ◽  
Matrix Formulation ◽  
Silver Films ◽  
Single Crystalline ◽  
Grating Pattern ◽  
Stacking Disorder

The relative intensities of the ED spots in a cross-grating pattern can be calculated using N-beam electron diffraction theory. The scattering matrix formulation of N-beam ED theory has been previously applied to imperfect microcrystals of gold containing stacking disorder (coherent twinning) in the (111) crystal plane. In the present experiment an effort has been made to grow single-crystalline, defect-free (111) gold films of a uniform and accurately know thickness using vacuum evaporation techniques. These represent stringent conditions to be met experimentally; however, if a meaningful comparison is to be made between theory and experiment, these factors must be carefully controlled. It is well-known that crystal morphology, perfection, and orientation each have pronounced effects on relative intensities in single crystals.The double evaporation method first suggested by Pashley was employed with some modifications. Oriented silver films of a thickness of about 1500Å were first grown by vacuum evaporation on freshly cleaved mica, with the substrate temperature at 285° C during evaporation with the deposition rate at 500-800Å/sec.

Hydrated form of some clay minerals observed using a film sealed environmental cell

1978 ◽  
Vol 36 (1) ◽  
pp. 72-73
Author(s):  
N. Kohyama ◽  
K. Fukushima ◽  
A. Fukami
Keyword(s):  
Clay Minerals ◽  
Morphological Changes ◽  
Carbon Film ◽  
Electron Microscopic Observation ◽  
Adsorbed Water ◽  
Electron Microscopic ◽  
Hydrated Form ◽  
Thin Carbon ◽  
Environmental Cell ◽  
Thin Carbon Film

Since the interlayer or adsorbed water of some clay minerals are quite easily dehydrated in dried air, in vacuum, or at moderate temperatures even in the atmosphere, the hydrated forms have not been observed by a conventional electron microscope(TEM). Recently, specific specimen chambers, “environmental cells(E.C.),” have been developed and confirmed to be effective for electron microscopic observation of wet specimen without dehydration. we observed hydrated forms of some clay minerals and their morphological changes by dehydration using a TEM equipped with an E.C..The E.C., equipped with a single hole copper-microgrid sealed by thin carbon-film, attaches to a TEM(JEM 7A) with an accelerating voltage 100KV and both gas pressure (from 760 Torr to vacuum) and relative humidity can be controlled. The samples collected from various localities in Japan were; tubular halloysite (l0Å) from Gumma Prefecture, sperical halloysite (l0Å) from Tochigi Pref., and intermediate halloysite containing both tubular and spherical types from Fukushima Pref..

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