Slow Charge Relaxation in Ionizable Alkanethiols and Its Role in Modulating Electric Characteristics of Molecules and Passivated Gold Nanoparticles
作者： Xian Ning Xie , Sankaran Sivaramakrishnan , Q. Song , Xingyu Gao , Peter K.-H Ho
DOI: 10.1021/JP810850E
关键词: Molecular electronics 、 Chemical physics 、 Ionic bonding 、 Analytical chemistry 、 Voltage 、 Ionization 、 Molecule 、 Chemistry 、 Passivation 、 Relaxation (NMR) 、 Colloidal gold
摘要: This work addresses the electric characteristics associated with slow ionization relaxation in ionizable alkylthiols which are widely used as passivation ligands for gold nanoparticles (NPs). It is observed that reversible ionic motion under a cycling voltage induces highly transient current strong hysteresis loop. The and of alkanethiols responsible buildup reversal an internal bias, thus leads to capacitive charge memory effect conduction molecules. role ligand behavior passivated NPs also demonstrated. process allows both resistive can be regulate transport through Au NP film. Our results represent novel mechanism governed by NP/molecule binary system would find new applications molecular electronics NP-based sensor devices.
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