Directed Crystallization of CuSO4 center dot 5H(2)O onto Carbon Nanotube Microarchitectures

作者：Lim Sharon Xiaodai; Lim Yong Hui; Loh Chang Le Charlotte; Yap Ying Yi Wendy; Chia Guo Mao; Sow Chorng Haur^*

来源：Journal of Physical Chemistry C, 2011, 115(43): 20964-20969.

DOI：10.1021/jp2062805

An assembly technique based on crystallization of thin CuSO4 center dot 5H(2)O microcrystals from salt solution onto patterned three-dimensional (3D) multiwalled carbon nanotube (MWNT) platform was developed. The vertically aligned MWNT arrays served as nucleation sites for the formation of microstructured CuSO4 center dot 5H(2)O crystals. In the presence of MWNTs, the CuSO4 center dot 5H(2)O crystal exhibited preferential crystallization in the ((2) over bar 22) orientation. Sculpting the MWNT platforms using a focused laser beam, as well as utilizing capillary forces that occurred during the drying process of the salt solution, a variety of 3D MWNT-microcrystal hybrid systems were created. In addition to the 3D MWNT platform created by focused laser beam pruning, we have also achieved assembly of the microcrystals onto MWNT array with patterned hydrophilic and hydrophobic regions. Such chemical modifications of the MWNT surface were achieved without introducing any physical destruction to the MWNT arrays. As such, two-dimensional template-directed assembly of crystals onto the hydrophilic regions on the MWNT surface was realized.

• 出版日期2011-11-3