Observation of self-polarization in BSA protected Au20 clusters. (5th October 2017)

• Record Type: Journal Article
• Authors: Swain, D K; Narzary, A; Singh, A K; Chandra, A; Nagasawa, T; Yamamoto, S; Mitsuishi, M; Rath, S
• Is Part Of: Nanotechnology. Volume 28:Number 44(2017)
• Publication Date: 2017-10-05
• Subjects: gold cluster -- optical properties -- dielectric properties -- electric polarization; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aa8718
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Bovine serum albumin (BSA)-protected gold clusters (atomicity ∼ 20), prepared using a wet chemical route, show strong dipolar radiative transition with a gap energy of 1.93 eV due to the high oscillator strength, as confirmed by the emission studies. Self-arrangement of the clusters with fixed atomicity yields a low dispersive dielectric and electric self-polarization nature. The electrical hysteresis loop measurements returned a remanent polarization of 0.05 μ C cm −2, which can be correlated with the dipolar orientation (activation energy ∼ 45.32 meV), originating from the structure-dependent deformation of the charge density.