NDLI: Laser-induced jets of nanoparticles: exploiting air drag forces to select the particle size of nanoparticle arrays

Content Provider	Royal Society of Chemistry (RSC)
Author	Chen, Hsuen-Li Chen, Yi-Chiun Lin, Ding-Chang Wang, Lon Alex Yu, Chen-Chieh Tseng, Yi-Chuan Chou, Sin-Yi Tseng, Shao-Chin
Copyright Year	2013
Abstract	In this study, we developed a new method—based on laser-induced jets of nanoparticles (NPs) and air drag forces—to select the particle size of NP arrays. First, the incident wavelength of an excimer laser was varied to ensure good photo-to-thermal energy conversion efficiency. We then exploited air drag forces to select NPs with sizes ranging from 5 to 50 nm at different captured distances. Controlling the jet distances allowed us to finely tune the localized surface plasmon resonance (LSPR) wavelength. The shifting range of the LSPR wavelengths of the corresponding NP arrays prepared using the laser-induced jet was wider than that of a single NP or an NP dimer. We further calculated the relationship between the air drag force and the diameter of the NPs to provide good control over the mean NP size (capture size ≧ 300 μm) by varying the capture distance. Laser-induced jets of NPs could also be used to fabricate NP arrays on a variety of substrates, including Si, glass, plastic, and paper. This method has the attractive features of rapid, large-area preparation in an ambient environment, no need for further thermal annealing treatment, ready control over mean particle size, and high selectivity in the positioning of NP arrays. Finally, we used this method to prepare large NP arrays for acting hot spots on surface-enhanced Raman scattering-active substrates, and 10−12 M R6G can be detected. Besides, we also prepare small NP arrays to act as metal catalysts for constructing low-reflection, broadband light trapping nanostructures on Si substrates.
Starting Page	2421
Ending Page	2428
Page Count	8
File Format	HTM / HTML PDF
ISSN	20403364
Volume Number	5
Issue Number	6
Journal	Nanoscale
DOI	10.1039/c3nr33835e
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	NP Surface-enhanced Raman spectroscopy Surface plasmon resonance Surface plasmon Protein dimer Excimer laser Wavelength Drag (physics) Nucleic acid thermodynamics
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology

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