Resonant optical properties of crystalline silicon nanoparticles fabricated by laser ablation-based methods

2017 ◽  
Author(s):  
P. A. Dmitriev ◽  
D. G. Baranov ◽  
V. A. Milichko ◽  
I. S. Mukhin ◽  
Q. Li ◽  
...  
Keyword(s):  
Optical Properties ◽  
Laser Ablation ◽  
Silicon Nanoparticles ◽  
Crystalline Silicon

Silicon Nanoparticles Produced by Femtosecond Laser Ablation in Ethanol: Size Control, Structural Characterization, and Optical Properties

2010 ◽  
Vol 114 (36) ◽  
pp. 15266-15273 ◽  
Author(s):  
Petr G. Kuzmin ◽  
Georgy A. Shafeev ◽  
Vladimir V. Bukin ◽  
Sergei V. Garnov ◽  
Cosmin Farcau ◽  
...  
Keyword(s):  
Optical Properties ◽  
Laser Ablation ◽  
Femtosecond Laser ◽  
Structural Characterization ◽  
Silicon Nanoparticles ◽  
Size Control ◽  
Femtosecond Laser Ablation

scholarly journals Nanoparticles Produced via Laser Ablation of Porous Silicon and Silicon Nanowires for Optical Bioimaging

Sensors ◽  
2020 ◽  
Vol 20 (17) ◽  
pp. 4874
Author(s):  
Stanislav V. Zabotnov ◽  
Anastasiia V. Skobelkina ◽  
Ekaterina A. Sergeeva ◽  
Daria A. Kurakina ◽  
Aleksandr V. Khilov ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Optical Properties ◽  
Laser Ablation ◽  
Porous Silicon ◽  
Silicon Nanowires ◽  
Silicon Nanoparticles ◽  
Near Infrared ◽  
Silicon Nanowire ◽  
Optical Coherence ◽  
Efficient Treatment

Modern trends in optical bioimaging require novel nanoproducts combining high image contrast with efficient treatment capabilities. Silicon nanoparticles are a wide class of nanoobjects with tunable optical properties, which has potential as contrasting agents for fluorescence imaging and optical coherence tomography. In this paper we report on developing a novel technique for fabricating silicon nanoparticles by means of picosecond laser ablation of porous silicon films and silicon nanowire arrays in water and ethanol. Structural and optical properties of these particles were studied using scanning electron and atomic force microscopy, Raman scattering, spectrophotometry, fluorescence, and optical coherence tomography measurements. The essential features of the fabricated silicon nanoparticles are sizes smaller than 100 nm and crystalline phase presence. Effective fluorescence and light scattering of the laser-ablated silicon nanoparticles in the visible and near infrared ranges opens new prospects of their employment as contrasting agents in biophotonics, which was confirmed by pilot experiments on optical imaging.

scholarly journals Luminescent Colloidal Silicon Nanocrystals Prepared by Nanoseconds Laser Fragmentation and Laser Ablation in Water

2008 ◽  
Vol 1066 ◽  
Author(s):  
Vladimir Svrcek ◽  
Davide Mariotti ◽  
Richard Hailstone ◽  
Hiroyuki Fujiwara ◽  
Michio Kondo
Keyword(s):  
Laser Ablation ◽  
Silicon Nanocrystals ◽  
Silicon Nanoparticles ◽  
Crystalline Silicon ◽  
Pulsed Laser ◽  
Surface States ◽  
Chemical Vapor ◽  
Solid Matrix ◽  
Attractive Alternative ◽  
Nanosecond Pulsed Laser

ABSTRACTThe surface states of silicon nanocrystals (Si-ncs) considerably affect quantum confinement effects and may determinate final nanocrystals properties. Colloidally dispersed Si-ncs offer larger freedom for surface modification compared to common plasma enhanced chemical vapor deposition or epitaxial synthesis in a solid matrix. The Si-ncs fabrication and elaboration in water by pulsed laser processing is an attractive alternative for controlling and engineering of nanocrystal surface by environmentally compatible way. We report on the possibility of direct silicon surface ablation and Si-ncs fabrication by nanosecond pulsed laser fragmentation of electrochemically etched Si micrograins and by laser ablation of crystalline silicon target immersed in de-ionized water. Two nanosecond pulsed lasers (Nd:YAG, and excimer KrF) are successfully employed to assure fragmentation and ablation in order to produce silicon nanoparticles. Contrary to the fragmentation process, which is more efficient under Nd:YAG irradiation, the laser ablation by both lasers led to the fabrication of fine and room temperature photoluminescent Si-ncs. The processing that has natural compatibility with the environment and advanced state of fabrication technologies may imply new possibilities and applications.

Pulsed Laser Ablation of Silicon Nanowires in Water and Ethanol

2020 ◽  
Vol 312 ◽  
pp. 200-205
Author(s):  
Stanislav V. Zabotnov ◽  
Anastasiia V. Skobelkina ◽  
Fedor V. Kashaev ◽  
Aleksandr V. Kolchin ◽  
Vladimir V. Popov ◽  
...  
Keyword(s):  
Laser Ablation ◽  
Silicon Nanowires ◽  
Silicon Nanoparticles ◽  
Crystalline Silicon ◽  
Silicon Nanowire ◽  
Pulsed Laser ◽  
Pulsed Laser Ablation ◽  
Nanowire Arrays ◽  
Silicon Nanowire Arrays ◽  
Traditional Approaches

A novel two-stage technique to fabricate silicon nanoparticles is reported. At the first stage, silicon nanowire arrays are formed by metal-assisted chemical etching. At the second stage, the nanoparticles are produced by pulsed laser ablation of the silicon nanowire targets in water and ethanol. The fabricated particles have relatively small mean size in the range of 24 – 45 nm depending on the used buffer liquid. The ablation threshold of the silicon nanowire arrays is 2 – 11 times smaller than that for crystalline silicon targets. Owing to the achieved parameters, the proposed technique is more efficient in comparison with traditional approaches of mechanical milling of silicon nanowires and laser ablation of crystalline silicon. Raman spectroscopy study revealed crystalline structure of the fabricated silicon nanoparticles. The properties of the produced nanoparticles indicate their high potential in biophotonics.

Sign in / Sign up

Export Citation Format

Share Document