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1 Mar 2010

Volume 96, Issue 9, Articles (09xxxx)

Issue Cover Spotlight Figure

Appl. Phys. Lett. 96, 091102 (2010); http://dx.doi.org/10.1063/1.3332591 (3 pages)

A. Schropp, P. Boye, J. M. Feldkamp, R. Hoppe, J. Patommel, D. Samberg, S. Stephan, K. Giewekemeyer, R. N. Wilke, T. Salditt, J. Gulden, A. P. Mancuso, I. A. Vartanyants, E. Weckert, S. Schöder, et al.
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Four probe architecture using high spatial resolution single multi-walled carbon nanotube electrodes for electrophysiology and bioimpedance monitoring of whole tissue

Edward D. de Asis, Joseph Leung, Sally Wood, and Cattien V. Nguyen

Appl. Phys. Lett. 96, 093701 (2010); http://dx.doi.org/10.1063/1.3292216 (3 pages) | Cited 1 time

Online Publication Date: 3 March 2010

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We report the application of a sensor with a multielectrode architecture consisting of four single multiwalled carbon nanotube electrodes (sMWNT electrodes) with nanotube tip diameters of approximately 30 nm to stimulation, recording, and bioimpedance characterization of whole muscle. Parallel pairs of sMWNT electrodes achieve improved stimulation efficiency from a reduction in electrode impedance and enhanced signal-to-noise ratio by detecting endogenic signals from a larger population of electrically active cells. The sensor with a four sMWNT electrode configuration can monitor changes in whole tissue bioimpedance.
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87.85.Rs Nanotechnologies-applications
87.85.Ox Biomedical instrumentation and transducers, including micro-electro-mechanical systems (MEMS)
87.17.-d Cell processes
87.19.Ff Muscles
87.19.R- Mechanical and electrical properties of tissues and organs

Superhydrophilic TiO2 surface without photocatalytic activation

Vassilia Zorba, Xiaobo Chen, and Samuel S. Mao

Appl. Phys. Lett. 96, 093702 (2010); http://dx.doi.org/10.1063/1.3291667 (3 pages) | Cited 11 times

Online Publication Date: 3 March 2010

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Since the discovery of extreme surface wetting phenomenon induced by ultraviolet photocatalysis, TiO2 has become the material of choice for environmental friendly applications such as self-cleaning coatings. Nevertheless, it remains a significant challenge to realize surfaces exhibiting persistent superhydrophilicity but without the need of external stimuli. We report a bioinspired TiO2 nanostructure that shows extreme superhydrophilicity without the need of light activation, and with stability against successive wetting-dewetting cycles. This ultimate TiO2 wetting surface exhibits high transmittance from near ultraviolet to the infrared, thus enabling practical antifogging technologies where transparency is critical.
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68.08.Bc Wetting
68.03.Cd Surface tension and related phenomena
78.20.Ci Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
78.67.Rb Nanoporous materials
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