JAP: Applied Biophysics http://scitation.aip.org/ JAP: Applied Biophysics Cell viability studies and operation in cellular culture medium of n-type organic field-effect transistors http://link.aip.org/link/?JAP/111/034702/1&agg=rss M. Barra, D. Viggiano, R. Di Capua, F. Di Girolamo, F. Santoro et al.<br/> The possibility of the fabrication of organic devices suitable to be applied in bio-sensing fields depends largely on the availability of organic compounds displaying robust electrical properties even in aqueous solutions and effective biocompatibility features. In this paper, we report about the go ... [J. Appl. Phys. 111, 034702 (2012)] published Mon Feb 13, 2012. Valence band dependence on thermal treatment of gold doped glasses and glass ceramics http://link.aip.org/link/?JAP/111/034701/1&agg=rss T. Radu, D. Benea, R. Ciceo-Lucacel, O. Ponta, and S. Simon<br/> This paper reports x-ray photoemission spectroscopy results regarding the nucleation and growing process of gold nanoparticles (AuNPs) in CaO-SiO-PO bioactive glasses heat treated at different temperatures. The analysis of the valence band (VB) spectra is discussed in terms of the AuNPs' shape, size ... [J. Appl. Phys. 111, 034701 (2012)] published Fri Feb 3, 2012. Size and shape effects on receptor-mediated endocytosis of nanoparticles http://link.aip.org/link/?JAP/111/024702/1&agg=rss Xinlei Li<br/> We present a thermodynamic approach to elucidate the effects of the size and shape of nanoparticles (NPs) on endocytosis. It is found that endocytosis needs to surmount a thermodynamic energy barrier and has a minimum radius of NPs for endocytosis. Through referring to the concept of diffusion lengt ... [J. Appl. Phys. 111, 024702 (2012)] published Wed Jan 18, 2012. Fluctuation modes of nanoconfined DNA http://link.aip.org/link/?JAP/111/024701/1&agg=rss Alena Karpusenko, Joshua H. Carpenter, Chunda Zhou, Shuang Fang Lim, Junhan Pan et al.<br/> We report an experimental investigation of the magnitude of length and density fluctuations in DNA that has been stretched in nanofluidic channels. We find that the experimental data can be described using a one-dimensional overdamped oscillator chain with nonzero equilibrium spring length and that ... [J. Appl. Phys. 111, 024701 (2012)] published Tue Jan 17, 2012. Forced wave motion with internal and boundary damping http://link.aip.org/link/?JAP/111/014702/1&agg=rss Tobias Louw, Scott Whitney, Anu Subramanian, and Hendrik Viljoen<br/> A d'Alembert-based solution of forced wave motion with internal and boundary damping is presented with the specific intention of investigating the transient response. The dynamic boundary condition is a convenient method to model the absorption and reflection effects of an interface without consider ... [J. Appl. Phys. 111, 014702 (2012)] published Fri Jan 6, 2012. Open photoacoustic cell for thermal diffusivity measurements of a fast hardening cement used in dental restoring http://link.aip.org/link/?JAP/111/014701/1&agg=rss F. B. G. Astrath, N. G. C. Astrath, M. L. Baesso, A. C. Bento, J. C. S. Moraes et al.<br/> Thermal diffusivity and conductivity of dental cements have been studied using open photoacoustic cell (OPC). The samples consisted of fast hardening cement named CER, developed to be a root-end filling material. Thermal characterization was performed in samples with different gel/powder ratio and p ... [J. Appl. Phys. 111, 014701 (2012)] published Thu Jan 5, 2012. Effects of cell cycle on the uptake of water soluble quantum dots by cells http://link.aip.org/link/?JAP/110/124701/1&agg=rss Shen Zheng, Ji-Yao Chen, Jun-Yong Wang, Lu-Wei Zhou, and Qian Peng<br/> Quantum dots (QDs) with excellent optical properties have become powerful candidates for cell imaging. Although numerous reports have studied the uptake of QDs by cells, little information exists on the effects of cell cycle on the cellular QD uptake. In this report, the effects of cell cycle on the ... [J. Appl. Phys. 110, 124701 (2011)] published Mon Dec 19, 2011. Behavior of peptides combining 1 alanine residue and 8 glycine residues on papain associated with structural fluctuations http://link.aip.org/link/?JAP/110/114701/1&agg=rss Katsuhiko Nishiyama<br/> I investigated the behavior of the peptides combining 1 ALA residue and 8 GLY residues on papain associated with structural fluctuations via molecular dynamics and docking simulations. Although the chance of binding to sites near the active center of papain was reduced by replacing the GLY residue i ... [J. Appl. Phys. 110, 114701 (2011)] published Thu Dec 8, 2011. Selective zinc ion detection by functionalised ZnO nanorods with ionophore http://link.aip.org/link/?JAP/110/104702/1&agg=rss Z. H. Ibupoto, Syed M. Usman Ali, C. O. Chey, K. Khun, O. Nur et al.<br/> In this paper, highly dense and well aligned single-crystal zinc oxide nanorods were grown along the c-axis on a gold coated glass substrate using a low temperature aqueous chemical growth approach. The prepared ZnO nanorods were functionalized with plastic membrane coatings containing specific iono ... [J. Appl. Phys. 110, 104702 (2011)] published Tue Nov 29, 2011. Qualitative and quantitative analysis of dynamic deformation of a cell in nonuniform alternating electric field http://link.aip.org/link/?JAP/110/104701/1&agg=rss Hua Li, Ting Ye, and K. Y. Lam<br/> The present paper is dedicated to numerical modeling of the deformation of a cell in a nonuniform ac electric field. A two-fluid model is presented to characterize the flow mechanism of a cell suspending in a medium, in which the mechanical force of cell membranes and dielectrophoretic forces due to ... [J. Appl. Phys. 110, 104701 (2011)] published Wed Nov 23, 2011. Modeling the action-potential-sensitive nonlinear-optical response of myelinated nerve fibers and short-term memory http://link.aip.org/link/?JAP/110/094702/1&agg=rss M. N. Shneider, A. A. Voronin, and A. M. Zheltikov<br/> The GoldmanAlbus treatment of the action-potential dynamics is combined with a phenomenological description of molecular hyperpolarizabilities into a closed-form model of the action-potential-sensitive second-harmonic response of myelinated nerve fibers with nodes of Ranvier. This response is shown ... [J. Appl. Phys. 110, 094702 (2011)] published Thu Nov 10, 2011. Low-damage milling of an amino acid thin film with cluster ion beam http://link.aip.org/link/?JAP/110/094701/1&agg=rss Masaki Hada, Sachi Ibuki, Yusaku Hontani, Yasuyuki Yamamoto, Kazuya Ichiki et al.<br/> In this work, we characterized the surface damage layer and sputtering yield of polycrystalline L-leucine films before and after irradiation with Ar cluster or monomer ion beams with x ray photoelectron spectroscopy and ellipsometry. Irradiation with Ar monomer ion beams induced heavy damage on the ... [J. Appl. Phys. 110, 094701 (2011)] published Wed Nov 2, 2011. Highly effective gold nanoparticle-enhanced biosensor array on the wettability controlled substrate by wiping http://link.aip.org/link/?JAP/110/084701/1&agg=rss Jongsu Kim, Hyunkyu Park, Bongchul Kang, Renata Ku, Chulho Ham et al.<br/> We demonstrate the use of a highly effective biosensor array to fulfill the requirements of high intensity, reduced nonspecific adsorption (NSA), and low sample usage. The mixed self-assembled monolayers (SAMs), consisting of methyl-terminated and methoxy-(polyethylene glycol (PEG))-terminated silan ... [J. Appl. Phys. 110, 084701 (2011)] published Wed Oct 19, 2011. The stability of source localization in a whole-head magnetoencephalography system demonstrated by auditory evoked field measurements http://link.aip.org/link/?JAP/110/074702/1&agg=rss Kuen-Lin Chen, Hong-Chang Yang, Sung-Ying Tsai, Yu-Wei Liu, Shu-Hsien Liao et al.<br/> Superconducting quantum interference device (SQUID), which is a very sensitive magnetic sensor, has been widely used to detect the ultra-small magnetic signals in many different territories, especially in the biomagnetic measurement. In this study, a 128-channel SQUID first-order axial gradiometer s ... [J. Appl. Phys. 110, 074702 (2011)] published Fri Oct 14, 2011. Biophysical attributes of an in vitro spinal cord surrogate for use in developing an intradural neuromodulation system http://link.aip.org/link/?JAP/110/074701/1&agg=rss M. A. Howard, III, M. Utz, T. J. Brennan, B. D. Dalm, S. Viljoen et al.<br/> We have developed a spinal cord surrogate for use in testing a pial-surface spinal cord stimulator. Our surrogate is of a commercially available silicone mix, has an oval cross-sectional area that matches that of actual human spinal cord at the lower thoracic level, and has measured values of durome ... [J. Appl. Phys. 110, 074701 (2011)] published Tue Oct 4, 2011. Three-dimensional endoscopic photoacoustic imaging based on multielement linear transducer array http://link.aip.org/link/?JAP/110/054701/1&agg=rss Yi Yuan, Sihua Yang, and Da Xing<br/> An implementation system of three-dimensional endoscopic photoacoustic imaging is presented. The developed endoscopic photoacoustic detector integrates a multielement linear transducer array, a reflective device, a Plexiglass tube, and ultrasonic coupling medium. To match with the acoustic impendenc ... [J. Appl. Phys. 110, 054701 (2011)] published Fri Sep 9, 2011. Intradural approach to selective stimulation in the spinal cord for treatment of intractable pain: design principles and wireless protocol http://link.aip.org/link/?JAP/110/044702/1&agg=rss M. A. Howard, III, M. Utz, T. J. Brennan, B. D. Dalm, S. Viljoen et al.<br/> We introduce an intradural approach to spinal cord stimulation for the relief of intractable pain, and describe the biophysical rationale that underlies its design and performance requirements. The proposed device relies on wireless, inductive coupling between a pial surface implant and its epidural ... [J. Appl. Phys. 110, 044702 (2011)] published Tue Aug 30, 2011. Strongly coupled bio-plasmonic system: Application to oxygen sensing http://link.aip.org/link/?JAP/110/044701/1&agg=rss Shourya Dutta-Gupta and Olivier J. F. Martin<br/> We investigate theoretically the strong coupling between surface plasmon resonances (SPRs) and absorption bands of hemoglobin. When the surface plasmon resonance spectrally overlaps the absorption bands of hemoglobin, the system is strongly coupled and its dispersion diagram exhibits an anti-crossin ... [J. Appl. Phys. 110, 044701 (2011)] published Fri Aug 26, 2011. Clinical diagnostic of pleural effusions using a high-speed viscosity measurement method http://link.aip.org/link/?JAP/110/034701/1&agg=rss Cedric Hurth, Katherine Klein, Lena van Nimwegen, Ronald Korn, Krishnaswami Vijayaraghavan et al.<br/> We present a novel bio-analytical method to discriminate between transudative and exudative pleural effusions based on a high-speed video analysis of a solid glass sphere impacting a liquid. Since the result depends on the solution viscosity, it can ultimately replace the battery of biochemical assa ... [J. Appl. Phys. 110, 034701 (2011)] published Mon Aug 8, 2011. Mode of bindings of zinc oxide nanoparticles to myoglobin and horseradish peroxidase: A spectroscopic investigations http://link.aip.org/link/?JAP/110/024701/1&agg=rss Gopa Mandal, Sudeshna Bhattacharya, and Tapan Ganguly<br/> The interactions between two heme proteins myoglobin (HMb) and horseradish peroxidase (HRP) with zinc oxide (ZnO) nanoparticles are investigated by using UVvis absorption, steady state fluorescence, synchronous fluorescence, time-resolved fluorescence, FT-IR, atomic force microscopy (AFM) and circul ... [J. Appl. Phys. 110, 024701 (2011)] published Fri Jul 29, 2011. Selective fibronectin adsorption against albumin and enhanced stem cell attachment on helium atmospheric pressure glow discharge treated titanium http://link.aip.org/link/?JAP/109/124701/1&agg=rss Inho Han, Barbora Vagaska, Bong Joo Park, Mi Hee Lee, Seung Jin Lee et al.<br/> Successful tissue integration of implanted medical devices depends on appropriate initial cellular response. In this study, the effect of helium atmospheric pressure glow discharge (He-APGD) treatment of titanium on selective protein adsorption and the initial attachment processes and focal adhesion ... [J. Appl. Phys. 109, 124701 (2011)] published Thu Jun 23, 2011.