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Silver nanocluster single molecule o...

Lee, Tae-Hee.

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Silver nanocluster single molecule optoelectronics and its applications.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Silver nanocluster single molecule optoelectronics and its applications./
作者:	Lee, Tae-Hee.
面頁冊數:	173 p.
附註:	Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1341.
Contained By:	Dissertation Abstracts International65-03B.
標題:	Chemistry, Physical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3126712
ISBN:	0496739913

Silver nanocluster single molecule optoelectronics and its applications.
Lee, Tae-Hee.

Silver nanocluster single molecule optoelectronics and its applications. - 173 p.

Source: Dissertation Abstracts International, Volume: 65-03, Section: B, page: 1341.

Thesis (Ph.D.)--Georgia Institute of Technology, 2004.

Charge transport dynamics through molecular scale materials is of common interest to both scientific and engineering disciplines. Putting molecules on nanoscale break junctions is the most straightforward setup to study charge transport dynamics through single molecules. Electromigration process can provide a simple and easy method of forming metallic oxide nanogap junctions. By using silver oxide thin films to form such nanogap junctions, silver nanoclusters (Ag2&sim;Ag8) are also formed in-situ within the junctions. Formed silver nanoclusters strongly and stably electroluminesce under DC, AC, and customized pulse train excitation. By detecting extremely sensitive feedback, i.e. photons, two interesting behaviors of single molecule charge transport dynamics were revealed: (1) asymmetric charge transport and (2) discrete energy level tunneling. The discrete energy level tunneling of field emitted electrons yields negative differential resistance (NDR). Combined with photoconductivity and optical reduction of silver oxide to form silver nanoclusters, junction-asymmetry and NDR can be very useful in both electronic and optoelectronic applications such as on-demand electronics fabrication, single photon sources, and nanoscale photon detectors.

ISBN: 0496739913Subjects--Topical Terms:

560527
Chemistry, Physical.

Silver nanocluster single molecule optoelectronics and its applications.
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520 $a Charge transport dynamics through molecular scale materials is of common interest to both scientific and engineering disciplines. Putting molecules on nanoscale break junctions is the most straightforward setup to study charge transport dynamics through single molecules. Electromigration process can provide a simple and easy method of forming metallic oxide nanogap junctions. By using silver oxide thin films to form such nanogap junctions, silver nanoclusters (Ag2&sim;Ag8) are also formed in-situ within the junctions. Formed silver nanoclusters strongly and stably electroluminesce under DC, AC, and customized pulse train excitation. By detecting extremely sensitive feedback, i.e. photons, two interesting behaviors of single molecule charge transport dynamics were revealed: (1) asymmetric charge transport and (2) discrete energy level tunneling. The discrete energy level tunneling of field emitted electrons yields negative differential resistance (NDR). Combined with photoconductivity and optical reduction of silver oxide to form silver nanoclusters, junction-asymmetry and NDR can be very useful in both electronic and optoelectronic applications such as on-demand electronics fabrication, single photon sources, and nanoscale photon detectors.
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