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Photodynamics on thin silver films.

Jacobson, Michele L.

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Photodynamics on thin silver films.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Photodynamics on thin silver films./
作者:	Jacobson, Michele L.
面頁冊數:	150 p.
附註:	Director: Kathy L. Rowlen.
Contained By:	Dissertation Abstracts International66-11B.
標題:	Chemistry, Analytical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3196481
ISBN:	9780542423482

Photodynamics on thin silver films.
Jacobson, Michele L.

Photodynamics on thin silver films. - 150 p.

Director: Kathy L. Rowlen.

Thesis (Ph.D.)--University of Colorado at Boulder, 2005.

Surface enhanced Raman spectroscopy (SERS) has been widely demonstrated to be capable of single molecule detection. In addition to enhancement of Raman scattering, the substrates used for SERS also display other unique optical properties such as photoluminescence and blinking. In this work, the photoactivation of Ag thin metal films as it relates to the mechanism of SERS enhancement and the production of Ag cluster SERS active sites was explored. Specifically, the photodynamics of SERS-active thin Ag films were quantitatively studied using a combination of optical imaging, high and low resolution spectroscopy, and atomic force microscopy. A key hypothesis tested in this work addressed the role of oxygen in TMF photodynamics. Based on spectroscopic and kinetic differences observed from thin Ag films under both ambient and nitrogen atmospheres, a simple photochemical mechanism for blinking in optical phenomena was developed and tested. The proposed mechanism relies on the photoreduction of silver oxide to produce an active species, which was postulated to be silver clusters. Additional spectroscopic, including two-dimensional correlation, and morphological analysis provided the basis for a more complete mechanistic description of the complex interaction between the substrate, light and adsorbed species.

ISBN: 9780542423482Subjects--Topical Terms:

586156
Chemistry, Analytical.

Photodynamics on thin silver films.
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502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2005.
520 $a Surface enhanced Raman spectroscopy (SERS) has been widely demonstrated to be capable of single molecule detection. In addition to enhancement of Raman scattering, the substrates used for SERS also display other unique optical properties such as photoluminescence and blinking. In this work, the photoactivation of Ag thin metal films as it relates to the mechanism of SERS enhancement and the production of Ag cluster SERS active sites was explored. Specifically, the photodynamics of SERS-active thin Ag films were quantitatively studied using a combination of optical imaging, high and low resolution spectroscopy, and atomic force microscopy. A key hypothesis tested in this work addressed the role of oxygen in TMF photodynamics. Based on spectroscopic and kinetic differences observed from thin Ag films under both ambient and nitrogen atmospheres, a simple photochemical mechanism for blinking in optical phenomena was developed and tested. The proposed mechanism relies on the photoreduction of silver oxide to produce an active species, which was postulated to be silver clusters. Additional spectroscopic, including two-dimensional correlation, and morphological analysis provided the basis for a more complete mechanistic description of the complex interaction between the substrate, light and adsorbed species.
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