Nanoparticle fractionation using an aligned carbon nanotube array.
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.
Lim
Xiaodai
X
NUS Graduate School for Integrative Sciences and Engineering (NGS), Centre for Life Sciences (CeLS), #05-01, 28 Medical Drive, 117456, Singapore.
Xu
Hairuo
H
Chew
Yi Hui Nicole
YH
Phua
Yi Hui
YH
Sie
Edbert Jarvis
EJ
Sum
Tze Chien
TC
Chia
Guo Hao
GH
Chin
Wee Shong
WS
Sow
Chorng-Haur
CH
D019187:Cadmium Compounds / Q000737:chemistry; D017895:Manganese Compounds / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry*; D046228:Microarray Analysis / Q000379:methods*; D037742:Nanotubes, Carbon / Q000737:chemistry*; D010316:Particle Size; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry; D013440:Sulfides / Q000737:chemistry; D017967:Zinc Compounds / Q000737:chemistry
D019187:Cadmium Compounds; D017895:Manganese Compounds; D037742:Nanotubes, Carbon; D018036:Selenium Compounds; D013440:Sulfides; D017967:Zinc Compounds; C034939:cadmium sulfide; C058667:cadmium selenide; C031238:zinc sulfide