Details

Autor(en) / Beteiligte

• Zheng, Lifeng
• Li, Shengdong
• Brody, James P
• Burke, Peter J

Titel

Manipulating Nanoparticles in Solution with Electrically Contacted Nanotubes Using Dielectrophoresis

Ist Teil von

• Langmuir, 2004-09, Vol.20 (20), p.8612-8619

Ort / Verlag

United States: American Chemical Society

Erscheinungsjahr

2004

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Dielectrophoresis is an electronic analogue1,2 of optical tweezers3 based on the same physical principle:  an ac electric field induces a dipole moment on an object in solution, which then experiences a force proportional to the gradient of the field intensity. For both types of tweezers, this force must compete with thermal Brownian4 motion to be effective, which becomes increasingly difficult as the particle size approaches the nanometer scale. Here we show that this restriction can be overcome by using the large electric field gradient in the vicinity of a carbon nanotube to electronically manipulate nanoparticles down to 2 nm in diameter.