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Conference Paper: Synthesis Of Functional Triblock Copolymers And Their Characterization By Electrostatic Force Microscopy
Title | Synthesis Of Functional Triblock Copolymers And Their Characterization By Electrostatic Force Microscopy |
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Authors | |
Issue Date | 2014 |
Publisher | The European Polymer Federation (EPF). |
Citation | The Europolymer Conference (EUPOC 2014), Palazzo Feltrinelli, Italy, 25–29 May 2014. In the Book of Abstracts of the Europolymer Conference (EUPOC), 2014, p. 53, abstract no. OC39 How to Cite? |
Abstract | ABA typed triblock copolymers functionalized with pyrene and terpyridine moieties were synthesized by
reversible addition-fragmentation chain transfer polymerization. The terpyridine units on the polymer
chain can further be functionalized by ruthenium complexes. These ruthenium complex can enhance the
photosensitivity of the copolymer by broadening the optical absorption in the UV-vis region. In addition,
the copolymer (Figure 1) can also function as dispersant for carbon nanotubes, as the pyrene units at both
ends of the polymer chain strongly interact with the carbon nanotube surface. A stable dispersion was
formed when a solution of polymer 2 in DMF was ultrasonicated with carbon nanotube. The TEM photos
before (Figure 2a) and after dispersion (Figure 2b) clearly show the attachment of a layer of polymer on
the surface of carbon nanotube. The resulting polymer-nanotube hybrid was characterized by electrostatic
force microscopy due to the presence of charged complexes on the nanotube surface. A conductive AFM
probe with applied bias at the tip was scanned over the surface of individual nanotube, confirming the
presence of charged species on the surface. The enhance of photocurrent response was also measured by
photoconductive atomic force microscopy. An enhancement in photocurrent response in the region
between 500-650 was observed, which strongly suggested that the ruthenium complexes played a critical
role in the generation of photocurrent. |
Description | Conference Theme: Precision Polymers: Synthesis, Folding and Function Oral Contribution The Book of Abstracts can be viewed at: http://www1.dcci.unipi.it/eupoc2014/doc/booklet_of_abstract_eupoc_2014.pdf |
Persistent Identifier | http://hdl.handle.net/10722/198179 |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chan, WK | en_US |
dc.contributor.author | Lo, KC | en_US |
dc.contributor.author | Shi, H | en_US |
dc.date.accessioned | 2014-06-25T02:51:18Z | - |
dc.date.available | 2014-06-25T02:51:18Z | - |
dc.date.issued | 2014 | en_US |
dc.identifier.citation | The Europolymer Conference (EUPOC 2014), Palazzo Feltrinelli, Italy, 25–29 May 2014. In the Book of Abstracts of the Europolymer Conference (EUPOC), 2014, p. 53, abstract no. OC39 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/198179 | - |
dc.description | Conference Theme: Precision Polymers: Synthesis, Folding and Function | - |
dc.description | Oral Contribution | - |
dc.description | The Book of Abstracts can be viewed at: http://www1.dcci.unipi.it/eupoc2014/doc/booklet_of_abstract_eupoc_2014.pdf | - |
dc.description.abstract | ABA typed triblock copolymers functionalized with pyrene and terpyridine moieties were synthesized by reversible addition-fragmentation chain transfer polymerization. The terpyridine units on the polymer chain can further be functionalized by ruthenium complexes. These ruthenium complex can enhance the photosensitivity of the copolymer by broadening the optical absorption in the UV-vis region. In addition, the copolymer (Figure 1) can also function as dispersant for carbon nanotubes, as the pyrene units at both ends of the polymer chain strongly interact with the carbon nanotube surface. A stable dispersion was formed when a solution of polymer 2 in DMF was ultrasonicated with carbon nanotube. The TEM photos before (Figure 2a) and after dispersion (Figure 2b) clearly show the attachment of a layer of polymer on the surface of carbon nanotube. The resulting polymer-nanotube hybrid was characterized by electrostatic force microscopy due to the presence of charged complexes on the nanotube surface. A conductive AFM probe with applied bias at the tip was scanned over the surface of individual nanotube, confirming the presence of charged species on the surface. The enhance of photocurrent response was also measured by photoconductive atomic force microscopy. An enhancement in photocurrent response in the region between 500-650 was observed, which strongly suggested that the ruthenium complexes played a critical role in the generation of photocurrent. | - |
dc.language | eng | en_US |
dc.publisher | The European Polymer Federation (EPF). | - |
dc.relation.ispartof | Europolymer Conference (EUPOC) | en_US |
dc.title | Synthesis Of Functional Triblock Copolymers And Their Characterization By Electrostatic Force Microscopy | en_US |
dc.type | Conference_Paper | en_US |
dc.identifier.email | Chan, WK: waichan@hku.hk | en_US |
dc.identifier.authority | Chan, WK=rp00667 | en_US |
dc.identifier.hkuros | 229603 | en_US |
dc.identifier.spage | 53, abstract no. OC39 | - |
dc.identifier.epage | 53, abstract no. OC39 | - |