Synthesis and Third-Order Optical Nonlinearities of Conjugated Polymer-Bonded Carbon Nanotubes

Yi, Wenhui; Feng, Wei; Xu, Youlong; Wu, Hougcai

doi:10.1143/jjap.44.3022

Cited by 7 publications

(2 citation statements)

References 43 publications

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“…The synthesis and characterization of this material were published elsewhere. 31 Figure 1 shows the molecular structure of POTABQ-MWNTs. All the solvents and chemicals were analyzing reagent grade and were obtained from Beijing Chem.…”

Section: Methodsmentioning

confidence: 99%

Enhancement of third-order optical nonlinearities by conjugated polymer-bonded carbon nanotubes

Feng

et al. 2005

Journal of Applied Physics

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Third-order nonlinear susceptibility ͑3͒ and second-order hyperpolarizability ␥ of poly͕͓3-octylthiophene-2,5-diyl͔-͓p-aminobenzylidenequinomethane͔-bonded multiwalled carbon nanotubes ͑POTABQ-MWNTs͒ were measured in chloroform solution using degenerate four-wave mixing at 532 nm under nanosecond pulse excitation. Effective nonlinear absorption coefficient ␤ eff and nonlinear refraction index n 2 were obtained using open aperture and close aperture Z-scan technique at the same wavelength, respectively. Optical limiting property of the sample was also investigated. The resulting POTABQ-MWNTs exhibited large third-order nonlinear optical responses mainly due to the formation of intramolecular photoinduced charge-transfer system of polymers and carbon nanotubes.

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Section: Methodsmentioning

confidence: 99%

Enhancement of third-order optical nonlinearities by conjugated polymer-bonded carbon nanotubes

Feng

et al. 2005

Journal of Applied Physics

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“…It is thus of great interest to design and prepare soluble CNTs covalently functionalized with polymers, which allows the easy manufacture of large‐area thin film optoelectronic devices by spin coating or screen‐printing technologies. Some solube polymers containing CNTs (including single‐walled carbon nanotubes (SWNTs) and multi‐walled carbon nanotubes (MWNTs)) for optical limiting have been reported 9–13…”

Section: Introductionmentioning

confidence: 99%

Multiwalled carbon nanotubes covalently functionalized with poly(N‐vinylcarbazole) via RAFT polymerization: Synthesis and nonliner optical properties

Zhang

Wang

Chen

et al. 2010

J. Polym. Sci. A Polym. Chem.

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The poly(N-vinylcarbazole)-grafted MWNTs (MWNT-PVK) hybrid materials were synthesized in the presence of S-1-Dodecyl-S 0 -(a, a 0 -dimethyl-a 00 -acetic acid) trithiocarbonate (DDAT)-covalently functionalized multiwalled carbon nanotubes (MWNT-DDAT) as reversible addition-fragmentation chain transfer (RAFT) agent. Incorporation of the PVK moieties onto the MWNTs surface can considerably improve the solubility and processability of MWNTs. For all MWNT-PVK hybrid materials, they are soluble in some common organic solvents such as toluene, THF, chloroform, DMF and others. In contrast to the UV/Vis spectrum of DDAT-PVK, which was synthesized by use of DDAT as RAFT agent under the same synthetic condition, in the visible region, the absorption spectrum of MWNT-PVK exhibited a typical electronic absorption characteristics of solubilized carbon nanotubes, in which the ab-sorbance decreases gradually in the range of 350-600 nm. At the same level of linear transmission the MWNT-PVK with 79.2% PVK moieties in the material structure possesses best optical limiting performance in comparison with the other MWNT-PVK composites, MWNTs and C 60 . The significant NLO responses manifest the MWNT-PVK materials suitable candidate for viable optical limiting devices. Light scattering, originating from the thermalinduced microplasmas and/or microbubbles, is responsible for the optical limiting. V C 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 3161-3168, 2010

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Conjugated polymer covalently modified multiwalled carbon nanotubes for optical limiting

Niu

Chen

et al. 2010

J. Polym. Sci. A Polym. Chem.

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A new soluble multiwalled carbon nanotubes (MWNTs) covalently functionalized with conjugated polymer PCBF, in which the wt % of MWNTs is approximately calculated as 7.3%, and the average thickness of PCBF covalently grafted onto MWNTs is 10.4 nm, was synthesized by an amidation reaction. In contrast to the starting polymer PCBF-NH 2 , grafting of PCBF onto MWNTs led to a 0.3 eV red-shift of the N1s XPS peak at 399.7 eV assigning to N in the unreacted NH 2 moieties in the resulting copolymer structure and an appearance of new peak at 402 eV corresponding to N bound to the carbonyl C (i.e., NHAC¼ ¼O). Unlike PCBF-NH 2 , which only dis-played a weak optical limiting response at 532 nm, Z-scan for MWNT-PCBF exhibited a much broader reduction in transmission and a scattering accompanying on the focus of the lens at both 532 and 1064 nm, indicating a prominent broadband optical limiting response. The thermally induced nonlinear scattering is responsible for the optical limiting.

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Synthesis and Third-Order Optical Nonlinearities of Conjugated Polymer-Bonded Carbon Nanotubes

Cited by 7 publications

References 43 publications

Enhancement of third-order optical nonlinearities by conjugated polymer-bonded carbon nanotubes

Enhancement of third-order optical nonlinearities by conjugated polymer-bonded carbon nanotubes

Multiwalled carbon nanotubes covalently functionalized with poly(N‐vinylcarbazole) via RAFT polymerization: Synthesis and nonliner optical properties

Conjugated polymer covalently modified multiwalled carbon nanotubes for optical limiting

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