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Characterization of gold particles w...

Posada Vera, Bertina.

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Characterization of gold particles with Raman spectroscopy and scanning electron microscopy.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Characterization of gold particles with Raman spectroscopy and scanning electron microscopy./
Author:	Posada Vera, Bertina.
Description:	32 p.
Notes:	Source: Masters Abstracts International, Volume: 43-01, page: 0221.
Contained By:	Masters Abstracts International43-01.
Subject:	Chemistry, Physical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1422011
ISBN:	0496267485

Characterization of gold particles with Raman spectroscopy and scanning electron microscopy.
Posada Vera, Bertina.

Characterization of gold particles with Raman spectroscopy and scanning electron microscopy. - 32 p.

Source: Masters Abstracts International, Volume: 43-01, page: 0221.

Thesis (M.S.)--University of Puerto Rico, Mayaguez (Puerto Rico), 2004.

Raman spectroscopy, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) were employed to characterize the surface species formed on gold nanoparticle surfaces prepared from reduction of gold (III) by potassium sulfite in aqueous solution. Raman spectroscopy measurements show evidence of adsorption of both, SO4-2 and SO3-2 on the gold nanoparticles surface. The symmetric S-O stretch frequency shifts to higher values upon adsorption of sulfate or sulfite on the gold particle surface as compared to free sulfate or sulfite ions in solution, consistent with recent theoretical calculations performed. SEM analyses show that small gold particles of about 200 to 800 nm were formed. This is confirmed by EDS analyses. EDS mapping reveals the presence of sulfur and oxygen on a gold nanoparticle surface. The Raman measurements presented here represent the first characterization of surface species formed in the synthesis of gold particles from reduction of gold (III) with potassium sulfite.

ISBN: 0496267485Subjects--Topical Terms:

560527
Chemistry, Physical.

Characterization of gold particles with Raman spectroscopy and scanning electron microscopy.
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040 $a UnM $c UnM
100 1 $a Posada Vera, Bertina. $3 1935828
245 1 0 $a Characterization of gold particles with Raman spectroscopy and scanning electron microscopy.
300 $a 32 p.
500 $a Source: Masters Abstracts International, Volume: 43-01, page: 0221.
500 $a Adviser: Miguel Castro Rosario.
502 $a Thesis (M.S.)--University of Puerto Rico, Mayaguez (Puerto Rico), 2004.
520 $a Raman spectroscopy, scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDS) were employed to characterize the surface species formed on gold nanoparticle surfaces prepared from reduction of gold (III) by potassium sulfite in aqueous solution. Raman spectroscopy measurements show evidence of adsorption of both, SO4-2 and SO3-2 on the gold nanoparticles surface. The symmetric S-O stretch frequency shifts to higher values upon adsorption of sulfate or sulfite on the gold particle surface as compared to free sulfate or sulfite ions in solution, consistent with recent theoretical calculations performed. SEM analyses show that small gold particles of about 200 to 800 nm were formed. This is confirmed by EDS analyses. EDS mapping reveals the presence of sulfur and oxygen on a gold nanoparticle surface. The Raman measurements presented here represent the first characterization of surface species formed in the synthesis of gold particles from reduction of gold (III) with potassium sulfite.
590 $a School code: 0553.
650 4 $a Chemistry, Physical. $3 560527
650 4 $a Chemistry, Inorganic. $3 517253
690 $a 0494
690 $a 0488
710 2 0 $a University of Puerto Rico, Mayaguez (Puerto Rico). $3 1017811
773 0 $t Masters Abstracts International $g 43-01.
790 1 0 $a Castro Rosario, Miguel, $e advisor
790 $a 0553
791 $a M.S.
792 $a 2004
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1422011