Publication Type : Journal Article
Thematic Areas : Medical Sciences
Publisher : Langmuir
Source : Langmuir, Volume 25, Number 3, p.1750-1756 (2009)
Url : http://www.scopus.com/inward/record.url?eid=2-s2.0-61849146236&partnerID=40&md5=3f70369d04760cc318f07a734a1db2ba
Campus : Kochi
School : School of Medicine
Department : Biostatistics
Year : 2009
Abstract : N-(2-Mercaptopropionyl glycine)-passivated gold clusters (Au-MPG) represent a unique networked system of monolayer-protected clusters (MPCs) due to inter- and/or intramolecular hydrogen bonding between the MPC units thanks to the terminal carboxylic acid groups of the monolayers. We have investigated the size-dependent electric charge transport in well-dried thin films of Au-MPG MPCs by a four-probe methodology as a function of temperature. The MPCs display a novel behavior of metallic-like-to-semiconductor crossover with increase of temperature. The MPCs having average cluster core sizes of ̃1.6, ̃3, and ̃4 nm displayed a metallic-like nature (a linear increase of resistance of the films with increase of temperature) at low temperatures (̃20-60 K), which crosses over to semiconductor behavior (decrease of resistance with increase of temperature) at high temperatures. © 2009 American Chemical Society.
Cite this Research Publication : A. S. Nair and Kimura, K., “Charge transport behavior of N-(2-Mercaptopropionyl glycine)-protected Gold clusters with temperature”, Langmuir, vol. 25, pp. 1750-1756, 2009.