Noble metallic nanostructures: preparation, properties, applications

18th International Summer School on Vacuum, Electron and Ion Technologies

Atanasov, P.A.^1 ; Nedyalkov, N.N.^1 ; Dikovska, A Og^1 ; Nikov, Ru^1 ; Amoruso, S.^2,3 ; Wang, X.^3 ; Bruzzese, R.^2,3 ; Hirano, K.^4 ; Shimizu, H.^4 ; Terakawa, M.^4 ; Obara, M.^4

Institute of Electronics, Bulgarian Academy of Sciences, 72 Tsarigradsko Chaussee, 1784 Sofia, Bulgaria^1

Dipartimento di Scienze Fisiche, Università Degli Studi di Napoli Federico II, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126 Napoli, Italy^2

CNR-SPIN, Complesso Universitario di Monte S. Angelo, Via Cintia, I-80126, Napoli, Italy^3

School of Integrated Design Engineering, Keio University, 3-14-1, Hiyoshi, Kohoku-ku, Yokohama-shi, 223-8522, Japan^4

关键词: Experimental techniques;    Finite -difference time domains (FDTD);    Glancing Angle Deposition;    Gold nanostructures;    Metallic nanostructure;    Off-axis depositions;    Surface enhanced Raman spectroscopy;    Theoretical simulation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/514/1/012024/pdf
DOI  :  10.1088/1742-6596/514/1/012024

来源: IOP

【 摘 要 】

The process of formation and the characteristics are studied of noble metal nanostructures created by pulsed laser ablation in vacuum. Femtosecond (fs) and nanosecond (ns) laser systems lasing at different wavelengths are used. Several different modifications of the pulsed lased deposition (PLD) technique, as off-axis deposition and glancing angle deposition configurations are used to create nanostructures. Laser annealing of single or bimetal thin films is used to fabricate alloyed nanostructures. The possibility is demonstrated of tuning the optical properties of gold nanostructures on flexible substrates. Different experimental techniques, as fast photography, optical emission spectroscopy, FE-SEM, AFM, TEM, and Raman spectroscopy are applied to characterize the noble metallic nanostructures produced. The optical spectra of the Au and Ag nanostructures are also studied experimentally and theoretically. The theoretical simulation methods used are: molecular dynamic (MD), finite difference time domain (FDTD) and a method based on the generalized multi-particle Mie (GMM) theory. Applications of noble metal nanostructures to surface enhanced Raman spectroscopy (SERS) and biophotonics are briefly considered.