PMID- 19374339
OWN - NLM
STAT- PubMed-not-MEDLINE
DCOM- 20090723
LR  - 20090512
IS  - 0743-7463 (Print)
IS  - 0743-7463 (Linking)
VI  - 25
IP  - 10
DP  - 2009 May 19
TI  - Covalent layer-by-layer functionalization of multiwalled carbon nanotubes by 
      click chemistry.
PG  - 5814-24
LID - 10.1021/la803906s [doi]
AB  - The covalent functionalization of multiwalled carbon nanotubes (MWNTs) by 
      layer-by-layer (LbL) click chemistry is reported. The clickable polymers of 
      poly(2-azidoethyl methacrylate) and poly(propargyl methacrylate) were synthesized 
      at first by atom transfer radical polymerization (ATRP) of 2-azidoethyl 
      methacrylate and reverse addition-fragmentation chain transfer (RAFT) 
      polymerization of propargyl methacrylate, respectively. The two polymers were 
      then alternately coated on alkyne-modified multiwalled carbon nanotubes using 
      Cu(I)-catalyzed click reaction of Huisgen 1,3-dipolar cycloaddition between 
      azides and alkynes. Thermogravimetric analysis (TGA), scanning electron 
      microscopy (SEM), and transmission electron microscopy (TEM) measurements confirm 
      that the quantity and thickness of the clicked polymer shell on MWNTs can be well 
      controlled by adjusting the cycles or numbers of click reaction and the polymer 
      shell is uniform and even. X-ray photoelectron spectroscopy (XPS) and Fourier 
      tranform infrared (FTIR) measurements showed that there were still a great amount 
      of residual azido groups on the surfaces of the functionalized MWNTs after 
      clicking three layers of polymers. Furthermore, alkyne-modified rhodamine B and 
      monoalkyne-terminated polystyrene were subsequently used to functionalize the 
      clickable polymer grafted MWNTs, giving rise to fluorescent carbon nanotubes 
      (CNTs) and CNT-based polystyrene brushes, respectively. It demonstrates that the 
      residual azido groups on the surfaces of MWNTs are available for further click 
      reaction with various functional molecules.
FAU - Zhang, Yu
AU  - Zhang Y
AD  - Department of Polymer Science and Engineering, and Key Laboratory of 
      Macromolecular Synthesis and Functionalization, Ministry of Education, Zhejiang 
      University, 38 Zheda Road, Hangzhou 310027, PR China.
FAU - He, Hongkun
AU  - He H
FAU - Gao, Chao
AU  - Gao C
FAU - Wu, Jiayan
AU  - Wu J
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Langmuir
JT  - Langmuir : the ACS journal of surfaces and colloids
JID - 9882736
EDAT- 2009/04/21 09:00
MHDA- 2009/04/21 09:01
CRDT- 2009/04/21 09:00
PHST- 2009/04/21 09:00 [entrez]
PHST- 2009/04/21 09:00 [pubmed]
PHST- 2009/04/21 09:01 [medline]
AID - 10.1021/la803906s [doi]
PST - ppublish
SO  - Langmuir. 2009 May 19;25(10):5814-24. doi: 10.1021/la803906s.