Manipulation and assembly of nanowires with holographic optical traps
  We demonstrate that semiconductor nanowires measuring just a few nanometers in diameter can be translated, rotated, cut, fused and organized into nontrivial structures using holographic optical traps. The holographic approach to nano-assembly allows for simultaneous independent manipulation of multiple nanowires, including relative translation and relative rotation. 
Ritesh Agarwal, Kosta Ladavac, Yael Roichman, Guiha Yu, Charles M.   Lieber and David G. Grier