1. Nanoparticle fractionation using an aligned carbon nanotube array
- Author
-
Wee Shong Chin, Yi Hui Phua, Guo Hao Chia, Hai Xu, Tze Chien Sum, Edbert J. Sie, Xiaodai Lim, Yi Hui Nicole Chew, and Chorng Haur Sow
- Subjects
Nanostructure ,Materials science ,Nanoparticle ,chemistry.chemical_element ,Metal Nanoparticles ,Bioengineering ,Nanotechnology ,Carbon nanotube ,Sulfides ,law.invention ,chemistry.chemical_compound ,Transition metal ,law ,Quantum Dots ,Cadmium Compounds ,General Materials Science ,Electrical and Electronic Engineering ,Particle Size ,Selenium Compounds ,Nanotubes, Carbon ,Mechanical Engineering ,Doping ,General Chemistry ,Microarray Analysis ,Zinc sulfide ,chemistry ,Manganese Compounds ,Mechanics of Materials ,Quantum dot ,Zinc Compounds ,Carbon - Abstract
A technique utilizing the capillary assisted sieving capability of carbon nanotubes (CNTs) to achieve fractionation of nanoparticles of small size distribution is presented. By dipping aligned CNT arrays into a solution comprising different sized quantum dots (QDs), size-selective gradient decoration of QDs onto CNTs is achieved. The fractionating capability of CNTs is also demonstrated for poly-dispersed manganese doped zinc sulfide nanoparticles and QDs of varying sizes and chemical compositions, which we attribute to the size-selective sieving effect of CNTs. By controlling the terminating point for the flow of QDs across the CNT array, a QD size specific CNT/QD hybrid structure is achieved.
- Published
- 2010