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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2016

Autores

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

Revista

Título: Applied Physics B: Lasers and Optics

Vol. 122

ISSN: 0946-2171

Editora: Springer Nature

Indexação

ISI Web of Knowledge - 12 Citações

Scopus - 12 Citações

Outras Informações

ID Authenticus: 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8