%0 Journal Article %1 Zhu2006 %A Zhu, Yanwu %A Elim, Hendry Izaac %A Foo, Yong-Lim %A Yu, Ting %A Liu, Yanjiao %A Ji, Wei %A Lee, Jim-Yang %A Shen, Zexiang %A Wee, Andrew Thye-Shen %A Thong, John Thiam-Leong %A Sow, Chorng-Haur %D 2006 %J Advanced Materials %K %P 587-592 %R 10.1002/adma.200501918 %T Multiwalled Carbon Nanotubes Beaded with ZnO Nanoparticles for Ultrafast Nonlinear Optical Switching %V 18 %X In this work, we report on a hybrid system of ZnO nanoparticles on MWNT scaffolds synthesized via a very simple and straightforward process. This involves the coating of pure Zn on as-grown, aligned MWNT films, followed by oxidization by simply heating the coated sample in air. After cooling, ZnO nanoparticles were found to have formed chain-like structures along the MWNTs, while the morphology of the aligned MWNTs remained unaltered. By directly changing the duration of the Zn coating step and thus the coating thickness, the average ZnO particle size and interparticle distance can be readily controlled. Based on this ZnO/MWNT hybrid system, an ultrafast nonlinear optical switching behavior has been demonstrated. Furthermore, three-photon adsorption of ZnO nanoparticles has been observed. Our results highlight opportunities for integrating CNTs with other functional oxide nanoparticles via a simple method, and for exploring the collective properties of nanoparticles/CNT hybrid materials. Moreover, it is expected that the larger specific surface area of ZnO nanoparticles on CNT forests would further enhance the performance of ZnO as a biological catalyst and gas sensor.

@article{Zhu2006, abstract = {In this work, we report on a hybrid system of ZnO nanoparticles on MWNT scaffolds synthesized via a very simple and straightforward process. This involves the coating of pure Zn on as-grown, aligned MWNT films, followed by oxidization by simply heating the coated sample in air. After cooling, ZnO nanoparticles were found to have formed chain-like structures along the MWNTs, while the morphology of the aligned MWNTs remained unaltered. By directly changing the duration of the Zn coating step and thus the coating thickness, the average ZnO particle size and interparticle distance can be readily controlled. Based on this ZnO/MWNT hybrid system, an ultrafast nonlinear optical switching behavior has been demonstrated. Furthermore, three-photon adsorption of ZnO nanoparticles has been observed. Our results highlight opportunities for integrating CNTs with other functional oxide nanoparticles via a simple method, and for exploring the collective properties of nanoparticles/CNT hybrid materials. Moreover, it is expected that the larger specific surface area of ZnO nanoparticles on CNT forests would further enhance the performance of ZnO as a biological catalyst and gas sensor.}, added-at = {2011-10-01T01:15:06.000+0200}, author = {Zhu, Yanwu and Elim, Hendry Izaac and Foo, Yong-Lim and Yu, Ting and Liu, Yanjiao and Ji, Wei and Lee, Jim-Yang and Shen, Zexiang and Wee, Andrew Thye-Shen and Thong, John Thiam-Leong and Sow, Chorng-Haur}, biburl = {https://www.bibsonomy.org/bibtex/2db8db46f90bc808b44c1f00f23a78e43/afcallender}, doi = {10.1002/adma.200501918}, file = {Zhu2006.pdf:indexed\\Zhu2006.pdf:PDF}, groups = {public}, interhash = {e617836f72b8d5acd9fa1c04da74760e}, intrahash = {db8db46f90bc808b44c1f00f23a78e43}, journal = {Advanced Materials}, keywords = {}, pages = {587-592}, timestamp = {2011-10-01T01:15:06.000+0200}, title = {Multiwalled Carbon Nanotubes Beaded with ZnO Nanoparticles for Ultrafast Nonlinear Optical Switching}, username = {afcallender}, volume = 18, year = 2006 }