Browsing by Subject "Future applications"
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Item Open Access Nanomechanical motion transducers for miniaturized mechanical systems(MDPI AG, 2017) Kouh, T.; Hanay, M. S.; Ekinci, K. L.Reliable operation of a miniaturized mechanical system requires that nanomechanical motion be transduced into electrical signals (and vice versa) with high fidelity and in a robust manner. Progress in transducer technologies is expected to impact numerous emerging and future applications of micro- and, especially, nanoelectromechanical systems (MEMS and NEMS); furthermore, high-precision measurements of nanomechanical motion are broadly used to study fundamental phenomena in physics and biology. Therefore, development of nanomechanical motion transducers with high sensitivity and bandwidth has been a central research thrust in the fields of MEMS and NEMS. Here, we will review recent progress in this rapidly-advancing area.Item Open Access Superhydrophobic, hybrid, electrospun cellulose acetate nanofibrous mats for oil/water separation by tailored surface modification(American Chemical Society, 2016) Arslan, O.; Aytac Z.; Uyar, TamerElectrospun cellulose acetate nanofibers (CA-NF) have been modified with perfluoro alkoxysilanes (FS/CA-NF) for tailoring their chemical and physical features aiming oil-water separation purposes. Strikingly, hybrid FS/CA-NF showed that perfluoro groups are rigidly positioned on the outer surface of the nanofibers providing superhydrophobic characteristic with a water contact angle of ∼155°. Detailed analysis showed that hydrolysis/condensation reactions led to the modification of the acetylated β(1 → 4) linked d-glucose chains of CA transforming it into a superhydrophobic nanofibrous mat. Analytical data have revealed that CA-NF surfaces can be selectively controlled for fabricating the durable, robust and water resistant hybrid electrospun nanofibrous mat. The -OH groups available on the CA structure allowed the basic sol-gel reactions started by the reactive FS hybrid precursor system which can be monitored by spectroscopic analysis. Since alkoxysilane groups on the perfluoro silane compound are capable of reacting for condensation together with the CA, superhydrophobic nanofibrous mat is obtained via electrospinning. This structural modification led to the facile fabrication of the novel oil/water nanofibrous separator which functions effectively demonstrated by hexane/oil and water separation experiments. Perfluoro groups consequently modified the hydrophilic CA nanofibers into superhydrophobic character and therefore FS/CA-NF could be quite practical for future applications like water/oil separators, as well as self-cleaning or water resistant nanofibrous structures.Item Open Access Ultra-low power signal processing(Institute of Electrical and Electronics Engineers, 2010) Frantz, G.; Henkel, J.; Rabaey, J.; Schneider, T.; Wolf, M.; Batur, U.This IEEE Signal Processing Magazine (SPM) forum discusses the latest advances and challenges in ultra-low power (ULP) signal processing (SP). The forum members bring their expert insights to issues such as design requirements and future applications of ULP SP systems. The invited forum members are Gene Frantz (Texas Instruments), Jorg Henkel (Karlsruhe Institute of Technology), Jan Rabaey (University of California at Berkeley), Todd Schneider (ON Semiconductor), and Marilyn Wolf (Georgia Institute of Technology). The moderator of the forum is Umit Batur (Texas Instruments). Our readers may agree or disagree with the ideas discussed next. In either case, we invite you to share your comments with us by e-mailing batur@ti.com or spm.columns. forums@gmail.com. © 2006 IEEE.