Oriented Au-Cu nanoalloy particle incorporated SiO(2) films using a new layer by layer deposition technique
IR@CGCRI: CSIR-Central Glass and Ceramic Research Institute, Kolkata
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| Title |
Oriented Au-Cu nanoalloy particle incorporated SiO(2) films using a new layer by layer deposition technique
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| Creator |
Pal, Sudipto
De, Goutam |
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| Subject |
Engineering Materials
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| Description |
Oriented Au-Cu nanoalloys have been generated in SiO(2) films using a new two-layer (TL) coating approach. Two successive overlapping coating layers were deposited on silica glass substrate using Au- and Cu-incorporated inorganic-organic hybrid silica sols. The concentrations of the Au and Cu (3 equivalent mol% metal-97% SiO(2) in each case) in the respective layers and their individual coating thicknesses were kept similar for the generation of Au-Cu alloys of an approximate atomic ratio 1 : 1. The UV-visible and X-ray diffraction (XRD) spectra of the TL films show the formation of nanoalloys with a gradual increase of Cu content with increasing heat-treatment temperature up to 750 degrees C in 10% H(2)-90% Ar. The XRD patterns reveal that the Au and Cu gradually formed Au-Cu nanoalloys of different ratios with a < 111 > orientation. Estimation shows that the final nanoalloy composition reaches Au(0.58)Cu(0.42). The transmission electron microscope (TEM) image obtained from an Au(0.58)Cu(0.42) nanoalloy containing film shows the presence of mainly < 111 > oriented plate-like circular nanoalloys of diameter 9-14 nm. XRD and TEM confirm that the alloy formation took place mainly through the diffusion and gradual dissolution of Cu atoms onto the < 111 > planes of Au and intermediate Au-Cu nanoalloy crystals.
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| Publisher |
ROYAL SOC CHEMISTRY
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| Date |
2007
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cgcri.csircentral.net/561/1/J_Mater_Chem_17_(2007)_493%2D498.pdf
Pal, Sudipto and De, Goutam (2007) Oriented Au-Cu nanoalloy particle incorporated SiO(2) films using a new layer by layer deposition technique. JOURNAL OF MATERIALS CHEMISTRY, 17 (5). pp. 493-498. ISSN 0959-9428 |
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| Relation |
http://pubs.rsc.org/en/content/articlepdf/2007/jm/b612539e?page=search
http://cgcri.csircentral.net/561/ |
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