Zhou Jin-Hua et al 2008 Chinese Phys. Lett. 25 329 doi:10.1088/0256-307X/25/1/088
Zhou Jin-Hua1, Qu Lian-Jie1, Yao Kun1, Zhong Min-Cheng1 and Li Yin-Mei1
Show affiliationsNanometre-scale particles can be manipulated using optical tweezers, but cannot be directly observed. We present a simple method that nanoparticles can be directly observed using optical tweezers combined with dark field microscopy. A laser beam perpendicular to a tightly focused laser beam for trap illuminates specimen and does not enter objective, nanoparticles in focal plane all can be directly observed in dark field because of light scattering. It is implemented that the polystyrene beads of diameter 100nm can be directly observed and trapped.
78.67.Bf Nanocrystals and nanoparticles
78.35.+c Brillouin and Rayleigh scattering; other light scattering
Condensed matter: electrical, magnetic and optical
Issue 1 (January 2008)
Received 19 June 2007
Zhou Jin-Hua et al 2008 Chinese Phys. Lett. 25 329
Nobuyuki Kanematsu et al 2004 Phys. Med. Biol. 49 N1
A Serquis et al 2007 Supercond. Sci. Technol. 20 L12
Wojciech Kamiński and Jerzy Lewandowski 2008 Class. Quantum Grav. 25 035001
B D Hall 2008 Metrologia 45 L5
F Angulo-Brown et al 1994 Eur. J. Phys. 15 38
Divakar Viswanath 2003 Nonlinearity 16 1035
Sheldon Goldstein et al 2005 J. Phys. A: Math. Gen. 38 1567
Robert Fairbrother et al 2006 Phys. Educ. 41 130
Murtuza Lokhandwalla et al 2001 Phys. Med. Biol. 46 1245