|
|||||
|
|
Enhanced optical modulation due to SPR in gold nanoparticles embedded WO3 thin films |
|
| Authors: | P.M. KadamN.L. Tarwal P.S. ShindeS.S. Mali R.S. PatilA.K. Bhosale H.P. DeshmukhP.S. Patil |
| Affiliation: | a Department of Electronics, Smt. Kasturbai Walchand College, Sangli 416416, India b Department of Physics, The New College, Kolhapur 416012, India c Department of Physics, Raje Ramrao Mahavidhyalaya, Jath 416005, India d Department of Physics, Y.M. College, Pune, India e Thin Film Materials Laboratory, Department of Physics, Shivaji University, Kolhapur 416004, India |
| Abstract: | Surface plasmon resonance (SPR) phenomenon of metal-dielectric composite thin films formed by embedding the noble metal nanoparticles in a dielectric matrix offers a high degree of flexibility and enables many applications such as surface enhanced spectroscopes, numerous biological and chemical sensing fields. A remarkable enhancement in optical modulation after embedding the gold nanoparticles in a reticulated mesh like matrix of WO3 thin films was observed. WO3 films were prepared onto the conducting ITO coated glass substrates by a novel pulsed spray pyrolysis technique (PSPT). A reticulated mesh like morphology of WO3 was achieved by optimizing the deposition parameters of PSPT and the gold nanoparticles were embedded in the WO3 matrix by a drop casting method. Enhancements in electrochromic properties of WO3 in terms of optical modulation (ΔOD), coloration efficiency (η) and response times (tc and tb) were attributed to the assistance of SPR in gold nanoparticles during coloration and electric field induced quenching of SPR during bleaching. |
| Keywords: | WO3 Thin film PSPT Optical modulation SPR |
| 本文献已被 ScienceDirect 等数据库收录！ | |