Synthesis and Characterizations of Nanocubes, Monodispersed Nanocrystals and Nanospheres of Au

Nanocubes, monodispersed nanocrystals and nanospheres of Au have been prepared by a simple reaction between HAuCl4·4H2O, NaOH and NH2OH·HCl in the presence of gelatin. The role of gelatin and the affection of pH in producing the nanoparticles of Au were discussed. The products were characterized by X-ray powder diffraction, transmission electron microscopy, and UV-visible absorption spectroscopy. The sizes of the monodispersed nanocrystals of Au were estimated by Debye-Scherrer formula according to XRD spectrum.

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Synthesis and Characterisation of Bicone-Shaped and Monodispersed Nanoparticles of Cu2S

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.194-196.755 ◽

2011 ◽

Vol 194-196 ◽

pp. 755-758

Author(s):

Ming Yang ◽

Kui Zhou

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Powder Diffraction ◽

Band Gaps ◽

Optical Measurements ◽

Visible Absorption ◽

X Ray ◽

Transmission Electron ◽

Uv Visible ◽

Visible Absorption Spectroscopy

Bicone-shaped and monodispersed nanoparticles of Cu2S have been prepared by a simple reaction between CuO suspension, NH2OH•HCl and (NH4)2S in the presence of gelatin at 5°C. The products were characterized by X-ray powder diffraction, transmission electron microscopy and UV-visible absorption spectroscopy. The band gaps are estimated to be 1.98 eV and 2.03 eV according to the results of optical measurements of bicone-shaped and monodispersed nanoparticles of Cu2S.

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Synthesis and Characterizations of Monodispersed Nanotriangle of Gold

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.455-456.549 ◽

2012 ◽

Vol 455-456 ◽

pp. 549-552

Author(s):

Kai Cheng Zhang ◽

Si Ying Zhao

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Decisive Role ◽

Direct Reaction ◽

Visible Absorption ◽

Gold Particles ◽

X Ray ◽

Transmission Electron ◽

Uv Visible ◽

Visible Absorption Spectroscopy

Monodispersed nanotriangles of gold have been prepared by a simple reaction between HAuCl4·4H2O, KOH and NH2OH·HCl in the presence of gelatin. Gelatin played a decisive role as an inhibitor of the direct reaction of NH2OH with AuCl4- and coagulation of the growing gold in producing the triangle. In the absence of gelatin, we can only obtain irregular large gold particles. The products were characterized by X-ray powder diffraction, transmission electron microscopy and UV-visible absorption spectroscopy.

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Synthesis and photocatalytic hydrogen evolution of meso-tetrakis(p-sulfonatophenyl)porphyrin functionalized platinum nanocomposites

Journal of Porphyrins and Phthalocyanines ◽

10.1142/s1088424610002392 ◽

2010 ◽

Vol 14 (06) ◽

pp. 540-546 ◽

Cited By ~ 19

Author(s):

Lingling Zhang ◽

Yongtao Lu ◽

Yukou Du ◽

Ping Yang ◽

Xiaomei Wang

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Fourier Transform ◽

Infrared Spectroscopy ◽

Antenna System ◽

X Ray Diffraction ◽

Visible Absorption ◽

X Ray ◽

Transmission Electron ◽

Visible Absorption Spectroscopy

Meso-tetrakis(p-sulfonatophenyl)porphyrin (TPPS4) functionalized platinum nanocomposites were synthesized and characterized using ultraviolet-visible absorption spectroscopy (UV-vis), fluorescence spectroscopy (FL), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray diffraction (XRD) methods. The postulated configuration of TPPS4 functionalized platinum nanocomposite may be described as an antenna system containing a photoreceptive TPPS4 shell and a nanosize platinum core. Fluorescence and photoelectrochemistry studies of both TPPS4 and the platinum nanocomposites showed that efficient electron/energy transfer occurred from the TPPS4 donor to the metallic nanocore acceptor. TPPS4 functionalized platinum nanocomposites are photocatalytic active for water reduction to produce hydrogen. The turnover numbers (TONPt and TONTPPS4) and quantum yield of hydrogen (ϕH2) for the photocatalyst (nPt:nTPPS4= 250) were 44, 11056, and 1.8%, respectively, calculated on the basis of the total amount of H2 evolution for 12 h irradiation.

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Photoluminescence profile mapping of Eu(iii) and Tb(III → IV)-embedded in quantum size SnO2 nanoparticles

RSC Advances ◽

10.1039/c4ra03966a ◽

2014 ◽

Vol 4 (59) ◽

pp. 31155-31161 ◽

Cited By ~ 8

Author(s):

Young In Choi ◽

Youngku Sohn

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Sno2 Nanoparticles ◽

Spectroscopic Properties ◽

X Ray Diffraction ◽

Visible Absorption ◽

X Ray ◽

Quantum Size ◽

Transmission Electron ◽

Uv Visible

Eu(iii) and Tb(iv) activators were embedded in quantum size SnO2 nanoparticles by a hydrothermal method and their morphologies, crystal structures and spectroscopic properties were examined by transmission electron microscopy, X-ray diffraction crystallography, UV-visible absorption, and 2D/3D-photoluminescence mapping.

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Crystallite Size Evaluation of ZnO Nanoparticles via Transmission Electron Microscopy and X-ray Powder Diffraction

Microscopy and Microanalysis ◽

10.1017/s1431927616008898 ◽

2016 ◽

Vol 22 (S3) ◽

pp. 1610-1611

Author(s):

Jonathan E. Cowen ◽

Ashley E. Harris ◽

Cecelia C. Pena ◽

Stephen C. Bryant ◽

Allison J. Christy ◽

...

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Crystallite Size ◽

Powder Diffraction ◽

Zno Nanoparticles ◽

X Ray ◽

Transmission Electron ◽

Size Evaluation

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Aquatic Fern (AzollaSp.) Assisted Synthesis of Gold Nanoparticles

International Journal of Nanoscience ◽

10.1142/s0219581x16500083 ◽

2016 ◽

Vol 15 (01n02) ◽

pp. 1650008 ◽

Cited By ~ 4

Author(s):

Anal K. Jha ◽

K. Prasad

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Gold Nanoparticles ◽

Surface Plasmon Resonance ◽

Au Nanoparticles ◽

X Ray ◽

Aquatic Fern ◽

Transmission Electron ◽

Anthraquinone Glycosides ◽

Uv Visible

Aquatic pteridophyte (Azolla sp.) was taken to assess its potential to synthesize the metal (Au) nanoparticles. The synthesized particles were characterized using X-ray, UV-visible, scanning and transmission electron microscopy analyses. Nanoparticles almost spherical in shape having the sizes of 5–17[Formula: see text]nm are found. UV-visible study revealed the surface plasmon resonance at 538[Formula: see text]nm. Responsible phytochemicals for the transformation were principally phenolics, tannins, anthraquinone glycosides and sugars present abundantly in the plant thereby bestowing it adaptive prodigality. Also, the use of Azolla sp. for the synthesis of gold nanoparticles offers the benefit of eco-friendliness.

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Ultrasonic Synthesis of Ag2Se Nanocrystal in Perrhenate Solution

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.919-921.2109 ◽

2014 ◽

Vol 919-921 ◽

pp. 2109-2111 ◽

Cited By ~ 1

Author(s):

Wei Jun Shan ◽

Qiang Yan ◽

Du Li ◽

Da Wei Fang ◽

Shu Liang Zang

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Powder Diffraction ◽

Ambient Pressure ◽

Ion Source ◽

Metal Chalcogenide ◽

X Ray ◽

Ultrasonic Synthesis ◽

Transmission Electron ◽

Se Nanoparticles

Ag2Se nanocrystal was successfully prepared by ultrasonic synthesis in water and ethanol systems at an ambient pressure. The powder of selenium was used as the selenium ion source. The size of the nanocrystals is in the scope of 10-20nm. The products were characterized by some means including X-ray Powder Diffraction (XRD) and Transmission Electron Microscopy (TEM) which was used to study the thermostability of the product. The result of the experiments indicated that the concentration of the reactant, the pH of the solution, the react temperature and the surfactant had some important influence on the formation and the size of the Ag2Se nanoparticles. The method we reported here is proved to be a new and an easy way to prepare the nanocrystals of metal chalcogenide.

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