Influence of substrate temperature on the properties of pulsed laser deposited silver nanoparticle thin films and their application in SERS detection of bovine serum albumin

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Kamakshi, K (Author) Other; Silva, JPB (Author) Other; Sekhar, KC (Author) Other; Marslin, G (Author) Other; Agostinho Moreira, JA (Author) FCUP; Conde, O (Author) Other; Almeida, A (Author) FCUP; Pereira, M (Author) Other; Gomes, MJM (Author) Other

Journal

Title: Applied Physics B: Lasers and Optics

Vol. 122

ISSN: 0946-2171

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 12 Citations

Scopus - 12 Citations

Other information

Authenticus ID: P-00N-5E3

DOI: 10.1007/s00340-016-6385-0

Abstract (EN): The effect of substrate temperature (T-s) on electrical conductance, surface plasmon resonance (SPR), and surface-enhanced Raman scattering (SERS) activity of silver nanoparticle (AgNP) thin films is presented. AgNP films are grown on glass substrates by pulsed laser deposition in a controlled Ar atmosphere at a pressure of 0.1 mbar and varying T-s. Different T-s results in different morphologies, as observed by scanning electron microscopy. The effect of interparticle distance on the electrical conductance of AgNPs is highlighted. The current-voltage characteristics display negative resistance effect and is attributed to the charge trapping process in AgNPs. The film deposited at room temperature presents a SPR peak at lambda = 460 nm, and its wavelength first increases until T-s reaches 300 degrees C and then decreases with further increasing T-s. The quantitative analysis of SERS studies reveals that SERS intensity of bovine serum albumin (BSA) adsorbed on AgNP substrate deposited at 300 degrees C exhibits a higher intensity as compared with that of BSA adsorbed on the SERS active substrates at any other T-s.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8