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Article: Fabrication and optoelectronic properties of novel films based on functionalized multiwalled carbon nanotubes and (Phthalocyaninato)Ruthenium(II) via coordination bonded layer-by-layer self-assembly

TitleFabrication and optoelectronic properties of novel films based on functionalized multiwalled carbon nanotubes and (Phthalocyaninato)Ruthenium(II) via coordination bonded layer-by-layer self-assembly
Authors
KeywordsMultilayer films
Functionalized multi-walled carbon nanotubes
Fabrication
Optoelectronic devices
Ruthenium
Issue Date2010
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/langmuir
Citation
Langmuir, 2010, v. 26 n. 20, p. 16084-16089 How to Cite?
Abstract4-(2-(4-pyridinyl)Ethynyl)benzenic diazonium salt (PBD) was used to modify multiwalled carbon nanotubes (MWCNTs) by the self-assembly technique. After the decomposition of the diazonium group in PBD under UV irradiation, the PBD monolayer film covalently anchored on multiwalled carbon nanotubes is very stable. The obtained pyridine-modified MWCNTs (Py(Ar)-MWCNTs) have good solubility in common organic solvents. Furthermore, the layer-by-layer (LBL) self-assembled fully conjugated films of Py(Ar)-MWCNTs and (phthalocyaninato) ruthenium(II) (RuPc) were fabricated on the PBD-modified substrates, and characterized using UV-vis absorption spectroscopy, scanning electron microscopy (SEM), and electrochemistry. The UV-vis analysis results indicate that the LBL RuPc/Py(Ar)-MWCNTs self-assembled multilayer films with axial ligands between the ruthenium atom and pyridine group were successfully fabricated, and the progressive assembly runs regularly with almost equal amounts of deposition in each cycle. A top view SEM image shows a random and homogeneous distribution of Py(Ar)-MWCNTs over the PBD-modified silicon substrate, which indicates well independence between all Py(Ar)-MWCNTs. Moreover, the opto-electronic conversion was also studied by assembling RuPc/Py(Ar)-MWCNTs multilayer films on PBD-modified ITO substrate. Under illumination, the LBL self-assembled films on ITO showed an effective photoinduced charge transfer because of their conjugated structure and the ITO current density changed with the number of bilayer. As the number of bilayers was increased, the photocurrent increases and reaches its maximum value (∼300 nA/cm 2) at nine bilayers. These results allow us to design novel materials for applications in optoelectronic devices by using LBL self-assembly techniques. © 2010 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/136702
ISSN
2015 Impact Factor: 3.993
2015 SCImago Journal Rankings: 1.750
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Scientific Foundation of China50573008
20634020
Specialized Research Fund for the Doctoral Program of High Education of China20050007018
20091101110031
Basic Research Foundation of Beijing Institute of Technology
Funding Information:

The authors are grateful to the National Natural Scientific Foundation of China (Grant No. 50573008, 20634020), The Specialized Research Fund for the Doctoral Program of High Education of China (Grant No. 20050007018, 20091101110031) and Basic Research Foundation of Beijing Institute of Technology for financial support of this work.

References

 

DC FieldValueLanguage
dc.contributor.authorZhao, Wen_HK
dc.contributor.authorTong, Ben_HK
dc.contributor.authorShi, Jen_HK
dc.contributor.authorPan, Yen_HK
dc.contributor.authorShen, Jen_HK
dc.contributor.authorZhi, Jen_HK
dc.contributor.authorChan, WKen_HK
dc.contributor.authorDong, Yen_HK
dc.date.accessioned2011-07-27T02:28:54Z-
dc.date.available2011-07-27T02:28:54Z-
dc.date.issued2010en_HK
dc.identifier.citationLangmuir, 2010, v. 26 n. 20, p. 16084-16089en_HK
dc.identifier.issn0743-7463en_HK
dc.identifier.urihttp://hdl.handle.net/10722/136702-
dc.description.abstract4-(2-(4-pyridinyl)Ethynyl)benzenic diazonium salt (PBD) was used to modify multiwalled carbon nanotubes (MWCNTs) by the self-assembly technique. After the decomposition of the diazonium group in PBD under UV irradiation, the PBD monolayer film covalently anchored on multiwalled carbon nanotubes is very stable. The obtained pyridine-modified MWCNTs (Py(Ar)-MWCNTs) have good solubility in common organic solvents. Furthermore, the layer-by-layer (LBL) self-assembled fully conjugated films of Py(Ar)-MWCNTs and (phthalocyaninato) ruthenium(II) (RuPc) were fabricated on the PBD-modified substrates, and characterized using UV-vis absorption spectroscopy, scanning electron microscopy (SEM), and electrochemistry. The UV-vis analysis results indicate that the LBL RuPc/Py(Ar)-MWCNTs self-assembled multilayer films with axial ligands between the ruthenium atom and pyridine group were successfully fabricated, and the progressive assembly runs regularly with almost equal amounts of deposition in each cycle. A top view SEM image shows a random and homogeneous distribution of Py(Ar)-MWCNTs over the PBD-modified silicon substrate, which indicates well independence between all Py(Ar)-MWCNTs. Moreover, the opto-electronic conversion was also studied by assembling RuPc/Py(Ar)-MWCNTs multilayer films on PBD-modified ITO substrate. Under illumination, the LBL self-assembled films on ITO showed an effective photoinduced charge transfer because of their conjugated structure and the ITO current density changed with the number of bilayer. As the number of bilayers was increased, the photocurrent increases and reaches its maximum value (∼300 nA/cm 2) at nine bilayers. These results allow us to design novel materials for applications in optoelectronic devices by using LBL self-assembly techniques. © 2010 American Chemical Society.en_HK
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/langmuiren_HK
dc.relation.ispartofLangmuiren_HK
dc.subjectMultilayer films-
dc.subjectFunctionalized multi-walled carbon nanotubes-
dc.subjectFabrication-
dc.subjectOptoelectronic devices-
dc.subjectRuthenium-
dc.titleFabrication and optoelectronic properties of novel films based on functionalized multiwalled carbon nanotubes and (Phthalocyaninato)Ruthenium(II) via coordination bonded layer-by-layer self-assemblyen_HK
dc.typeArticleen_HK
dc.identifier.emailChan, WK:waichan@hku.hken_HK
dc.identifier.authorityChan, WK=rp00667en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/la1022196en_HK
dc.identifier.pmid20853832-
dc.identifier.scopuseid_2-s2.0-77957919958en_HK
dc.identifier.hkuros186089en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77957919958&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume26en_HK
dc.identifier.issue20en_HK
dc.identifier.spage16084en_HK
dc.identifier.epage16089en_HK
dc.identifier.isiWOS:000282936700052-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridZhao, W=7403943293en_HK
dc.identifier.scopusauthoridTong, B=7004577725en_HK
dc.identifier.scopusauthoridShi, J=16686876400en_HK
dc.identifier.scopusauthoridPan, Y=23992867900en_HK
dc.identifier.scopusauthoridShen, J=18435148400en_HK
dc.identifier.scopusauthoridZhi, J=23010923700en_HK
dc.identifier.scopusauthoridChan, WK=13310083000en_HK
dc.identifier.scopusauthoridDong, Y=7403385986en_HK

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