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nanotimes News in Brief

paration of porous polyimide films with an ordered surface and may be extended to prepare other ordered porous polymer films.

Chao Wang, Qihua Wang, and Tingmei Wang: Simple Method for Preparation of Porous Polyimide Film with an Ordered Surface Based on in Situ Self-Assembly of Polyamic Acid and Silica Microspheres, In: Langmuir, Vol. 26(2011), No. 23, February 1, 2011, Pages 18357- 18361, DOI:10.1021/la103473u: http://pubs.acs.org/doi/abs/10.1021/la103473u

11-01 :: December 2010 / January 2011

Wei, Yufeng Li, Yuliang Zhao, and Chunying Chen: Selective Targeting of Gold Nanorods at the Mitochond- ria of Cancer Cells: Implications for Cancer Therapy, In: Nano Letters ASAP, December 27, 2010, DOI:10.1021/ nl103992v:

http://dx.doi.org/10.1021/nl103992v

Prof. CHEN Chunying’s and Prof. WU Xiaochun’s groups at National Center for Nanoscience and Technology, Chinese Academy of Sciences, found that gold nanorods (Au NRs) can effectively kill tumor cells while hardly affect the physiological functions of normal cells and adult stem cells. The reason is that Au NRs have different trafficking process in three types of cells. In tumor cells, inter- nalized Au NRs selectively target at mitochondria, destroy their structures, affect metabolic functions and finally cause cell death. While in normal and stem cells, Au NRs remain in lysosomes and do not decrease their viabilities. Although similar uptake pathways are involved in the internalization of Au NRs in three types of cells, the cell-specific effects come from sensitivity or resistance of lysosomal membrane to surface molecules of Au NRs. This finding provides a good opportunity to design smart nanocarriers or nanoparticles with organelle- target to overcome cancer.

Liming Wang, Ying Liu, Wei Li, Xiumei Jiang, Yinglu Ji, Xiaochun Wu, Ligeng Xu, Yang Qiu, Kai Zhao, Taotao

With the supports of the Chinese Academy of Sci- ences, the Chinese Ministry of Science and Techno- logy, and the National Natural Science Foundation of China, the researchers in the Chinese Academy of Sciences Key Laboratory of Molecular nano- structure and nanotechnology and Key Laboratory of Organic Solids made a series of progresses in photodetectors based on metal selenide nanoma- terials

They prepared indium selenide (InSe) nanowires through a vapor transport system without any metal catalysts. A single nanowire deposited between two electrodes produced a low current (40 pA) in the dark, and a current up to 50 times higher (2000 pA) upon visible light irradiation. Switching between the two distinct states was reversible and fast. Most importantly, the photoresponse of the nanowires undegraded after stored in air over two months. In addition, CuInSe2

is a promising light-absorbing

material suitable for high-efficiency solar cells with a appropriate direct band-gap and high absorption coefficient. The reseachers synthesized uniform hexagonal shape and monodispersed CuInSe2

crystals.

A high-performance photodetector based on a hybrid film of CuInSe2

nanocrystals and poly(3-

nano-