Electrically controllable metal-insulator-like transition in nanoparticle compacts

NCU Institutional Repository > 理學院 > 物理學系 > 期刊論文 > Item 987654321/52893

請使用永久網址來引用或連結此文件: http://ir.lib.ncu.edu.tw/handle/987654321/52893

題名:	Electrically controllable metal-insulator-like transition in nanoparticle compacts
作者:	Wang,CW;Wu,CM;Karna,SK;Li,CY;Hsu,CK;Li,CHC;Li,WH
貢獻者:	物理學系
關鍵詞:	POWDER COMPACTS;GOLD ATOMS;MAGNETORESISTANCE;RESISTIVITY;CONDUCTANCE;PARTICLES
日期:	2011
上傳時間:	2012-06-11 10:48:43 (UTC+8)
出版者:	國立中央大學
摘要:	We report on the observations of tunneling transport in nanocompacts, where nanoparticles are packed into compact units using selective mass compositions and packing densities. An insulator-like thermal behavior in electron transport is seen in a very loosely packed 6-nm Ag nanocompact, whereas the densely packed 4.5-nm Au nanocompact displays a metal-like thermal behavior. Metal-insulator-like transitions, with the transition temperature can readily be tuned by controlling the bias voltage, are observed in the nanocompact consists of mixtures of 2.4 nm Ag and 4.8 nm core/shell Cu/Cu(2)O nanoparticles. The resistivity across the metal-insulator transition is found to change by more than four orders-of-magnitude. At low bias voltages or small excitation currents, the metal-insulator transition occurs at similar to 190 K. The transition temperature can be tuned to reach the ambient temperature when a higher bias voltage or a larger current is allowed. Possible mechanisms that may produce the observed transport characteristics in the nanocompacts are discussed.
關聯:	JOURNAL OF NANOPARTICLE RESEARCH
顯示於類別:	[物理學系] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	417	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing