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Panpan Gai, Chengcheng Gu, Ting Hou, Feng Li
Herein, we reported a novel ultrasensitive one-compartment enzyme biofuel cells (EBFCs)-based self-powered aptasensing platform for antibiotic residue detection. By taking full advantage of the unique features of both EBFCs-based self-powered sensors and aptamers, the as-proposed aptasensing platform has the merits of simple instrumentation, anti-interference ability, high selectivity, and low cost. In this study, DNA bioconjugate, i.e., SiO2@gold nanoparticles-complementary strand of aptamer (SiO2@AuNPs-csDNA), was elaborately designed and played a key role in blocking the mass transport of glucose to the bioanode...
February 7, 2017: Analytical Chemistry
Ryohei Seki, Cai Li, Qi Fang, Shinichi Hayashi, Shiro Egawa, Jiang Hu, Luohao Xu, Hailin Pan, Mao Kondo, Tomohiko Sato, Haruka Matsubara, Namiko Kamiyama, Keiichi Kitajima, Daisuke Saito, Yang Liu, M Thomas P Gilbert, Qi Zhou, Xing Xu, Toshihiko Shiroishi, Naoki Irie, Koji Tamura, Guojie Zhang
Unlike microevolutionary processes, little is known about the genetic basis of macroevolutionary processes. One of these magnificent examples is the transition from non-avian dinosaurs to birds that has created numerous evolutionary innovations such as self-powered flight and its associated wings with flight feathers. By analysing 48 bird genomes, we identified millions of avian-specific highly conserved elements (ASHCEs) that predominantly (>99%) reside in non-coding regions. Many ASHCEs show differential histone modifications that may participate in regulation of limb development...
February 6, 2017: Nature Communications
Fan Wu, Christoph Rüdiger, Mehmet Rasit Yuce
Wireless sensor networks (WSNs) play an increasingly important role in monitoring applications in many areas. With the emergence of the Internet-of-Things (IoT), many more lowpower sensors will need to be deployed in various environments to collect and monitor data about environmental factors in real time. Providing power supply to these sensor nodes becomes a critical challenge for realizations of IoT applications as sensor nodes are normally battery-powered and have a limited lifetime. This paper proposes a wireless sensor network that is powered by solar energy harvesting...
February 1, 2017: Sensors
Liang Zhou, Shantanu Chakrabartty
In our previous work we demonstrated that by eliminating regulation and rectification modules from the energy harvesting pathway, the minimum activation power of a piezoelectricity-driven hot-electron injector (p-HEI) can be reduced down to a few nanowatts. As a result the p-HEI device could be used for self-powered, in-vivo recording of biomechanical strain variations. However, for large magnitudes of input strain energy, the response of the modified p-HEI sensor was found to be quasi-linear with respect to the number of loading cycles, which made the calibration of the sensor difficult across a wide variety of biomedical applications...
November 14, 2016: IEEE Transactions on Biomedical Circuits and Systems
Mingquan Yuan, Keng-Ku Liu, Srikanth Singamaneni, Shantanu Chakrabartty
This paper extends our previous work on silver-enhancement based self-assembling structures for designing reliable, self-powered biosensors with forward error correcting (FEC) capability. At the core of the proposed approach is the integration of paper-based microfluidics with quick response (QR) codes that can be optically scanned using a smart-phone. The scanned information is first decoded to obtain the location of a web-server which further processes the self-assembled QR image to determine the concentration of target analytes...
September 6, 2016: IEEE Transactions on Biomedical Circuits and Systems
Mingquan Yuan, Keng-Ku Liu, Srikanth Singamaneni, Shantanu Chakrabartty
This paper extends our previous work on silver-enhancement based self-assembling structures for designing reliable, self-powered biosensors with forward error correcting (FEC) capability. At the core of the proposed approach is the integration of paper-based microfluidics with quick response (QR) codes that can be optically scanned using a smart-phone. The scanned information is first decoded to obtain the location of a web-server which further processes the self-assembled QR image to determine the concentration of target analytes...
October 2016: IEEE Transactions on Biomedical Circuits and Systems
Yiin Kuen Fuh, Zih Ming Huang, Bo Sheng Wang, Shan Chien Li
In this study, we demonstrated a flexible and self-powered sensor based on piezoelectric fibers in the diameter range of nano- and micro-scales. Our work is distinctively different from previous electrospinning research; we fabricated this apparatus precisely via near-field electrospinning which has a spectacular performance to harvest mechanical deformation in arbitrary direction and a novel concentrically circular topography. There are many piezoelectric devices based on electrospinning polymeric fibers. However, the fibers were mostly patterned in parallel lines and they could be actuated in limited direction only...
December 2017: Nanoscale Research Letters
Xiaofeng Wang, Simiao Niu, Fang Yi, Yajiang Yin, Chenglong Hao, Keren Dai, Yue Zhang, Zheng You, Zhong Lin Wang
Vibration is one of the most common energy sources in ambient environment. Harvesting vibration energy is a promising route to sustainably drive small electronics. This work introduces an approach to scavenge vibrational energy over a wide frequency range as an exclusive power source for continuous operation of electronics. An elastic multiunit triboelectric nanogenerator (TENG) is rationally designed to efficiently harvest low-frequency vibration energy, which can provide a maximum instantaneous output power density of 102 W·m(-3) at as low as 7 Hz and maintain its stable current outputs from 5 to 25 Hz...
January 17, 2017: ACS Nano
Peiyi Song, Shuangyang Kuang, Nishtha Panwar, Guang Yang, Danny Jian Hang Tng, Swee Chuan Tjin, Wun Jern Ng, Maszenan Bin Abdul Majid, Guang Zhu, Ken-Tye Yong, Zhong Lin Wang
The first triboelectric-nanogenerator (TENG)-based self-powered implantable drug-delivery system is presented. Pumping flow rates from 5.3 to 40 µL min(-1) under different rotating speeds of the TENG are realized. The implantable drug-delivery system can be powered with a TENG device rotated by human hand motion. Ex vivo trans-sclera drug delivery in porcine eyes is demonstrated by utilizing the biokinetic energies of human hands.
January 9, 2017: Advanced Materials
Shuyan Gao, Jingzhen Su, Xianjun Wei, Miao Wang, Miao Tian, Tao Jiang, Zhong Lin Wang
A rotary disc-structured triboelectric nanogenerator (rd-TENG) on the basis of free-standing electrification has been designed, where the aluminum composite panel has not been tailored to the stator becauseit is commercially available and cost-effective, has good electronic conductivity, and is easily processed. With the rotating speed increasing from 200 to 1000 rpm, the short-circuit current (Isc) is sharply enhanced from 50 μA to 200 μA, while the measured open-circuit voltage (Voc) and transferred charge (Qtr) almost keep constant, 600 V and 0...
January 11, 2017: ACS Nano
Huijuan Guo, Tao Li, Xiaotao Cao, Jin Xiong, Yang Jie, Magnus Willander, Xia Cao, Ning Wang, Zhong Lin Wang
Triboelectric nanogenerators (TENGs) offer great opportunities to deploy advanced wearable electronics that integrate a power generator and smart sensor, which eliminates the associated cost and sustainability concerns. Here, an embodiment of such integrated platforms has been presented in a graphene oxide (GO) based single-electrode TENG (S-TENG). The as-designed multifunctional device could not only harvest tiny bits of mechanical energy from ambient movements with a high power density of 3.13 W·m(-2) but also enable detecting dynamic force with an excellent sensitivity of about 388 μA·MPa(-1)...
January 9, 2017: ACS Nano
Xuexian Chen, Mengdi Han, Haotian Chen, Xiaoliang Cheng, Yu Song, Zongming Su, Yonggang Jiang, Haixia Zhang
A wave-shaped hybrid nanogenerator (NG) with mutually enhanced piezoelectric and triboelectric output is presented in this work. By sandwiching piezoelectric P(VDF-TrFE) nanofibers between wave-shaped Kapton films, the device forms a three-layer structure, which can generate piezoelectric and triboelectric outputs simultaneously in one press and release cycle. Through systematic situational analysis and experimental validation, the three-layer structure can achieve obvious improvement of the output performance for both parts...
January 19, 2017: Nanoscale
Zhiwei Xie, Yixue Su, Gloria B Kim, Erhan Selvi, Chuying Ma, Virginia Aragon-Sanabria, Jer-Tsong Hsieh, Cheng Dong, Jian Yang
Although tremendous efforts have been made on targeted drug delivery systems, current therapy outcomes still suffer from low circulating time and limited targeting efficiency. The integration of cell-mediated drug delivery and theranostic nanomedicine can potentially improve cancer management in both therapeutic and diagnostic applications. By taking advantage of innate immune cell's ability to target tumor cells, the authors develop a novel drug delivery system by using macrophages as both nanoparticle (NP) carriers and navigators to achieve cancer-specific drug delivery...
December 27, 2016: Small
Sun Jin Kim, Han Eol Lee, Hyeongdo Choi, Yongjun Kim, Ju Hyung We, Ji Seon Shin, Keon Jae Lee, Byung Jin Cho
Flexible thermoelectric generators (f-TEGs) are emerging as a semipermanent power source for self-powered sensors, which is an important area of research for next-generation smart network monitoring systems in the Internet-of-things era. We report in this paper a f-TEG produced by a screen-printing technique (SPT) and a laser multiscanning (LMS) lift-off process. A screen-printed TEG was fabricated on a SiO2/a-Si/quartz substrate via the SPT process, and the LMS process completely separated the rigid quartz substrate from the original TEG by selective reaction of the XeCl excimer laser with the exfoliation layer (a-Si)...
December 27, 2016: ACS Nano
Long Wen, Qin Chen, Xin Hu, Huacun Wang, Lin Jin, Qiang Su
Plasmonic scattering from metallic nanoparticles has been used for centuries to create the colorful appearance of stained glass. Besides their use as passive spectral filtering components, multifunctional optoelectronic applications can be achieved by integrating the nanoscatters with semiconductors that generate electricity using the complementary spectral components of plasmonic colors. To suppress the usual degradation of both efficiency and the gamut of plasmonic scattering coloration in highly asymmetric index configurations like a silicon host, aluminum nanodisks on indium tin oxide (ITO) coated silicon were experimentally studied and demonstrated color sorting in the full visible range along with photocurrent generation...
December 27, 2016: ACS Nano
Sophia Selvarajan, Nagamalleswara Rao Alluri, Arunkumar Chandrasekhar, Sang-Jae Kim
Simple, novel, and direct detection of clinically important biomolecules have continuous demand among scientific community as well as in market. Here, we report the first direct detection and facile fabrication of a cysteine-responsive, film-based, self-powered device. NH2 functionalized BaTiO3 nanoparticles (BT-NH2 NPs) suspended in a three-dimensional matrix of an agarose (Ag) film, were used for cysteine detection. BaTiO3 nanoparticles (BT NPs) semiconducting as well as piezoelectric properties were harnessed in this study...
May 15, 2017: Biosensors & Bioelectronics
C S Chitra Lekha, Ajith S Kumar, S Vivek, U P Mohammed Rasi, K Venkata Saravanan, K Nandakumar, Swapna S Nair
Harvesting energy from surrounding vibrations and developing self-powered portable devices for wireless and mobile electronics have recently become popular. Here the authors demonstrate the synthesis of piezoelectric energy harvesters based on nanotube arrays by a wet chemical route, which requires no sophisticated instruments. The energy harvester gives an output voltage of 400 mV. Harvesting energy from a sinusoidal magnetic field is another interesting phenomenon for which the authors fabricated a magnetoelectric energy harvester based on piezoelectric-magnetostrictive coaxial nanotube arrays...
February 3, 2017: Nanotechnology
Longfei Mi, Hui Wang, Yan Zhang, Xudong Yao, Yajing Chang, Guopeng Li, Guohua Li, Yang Jiang
Here we fabricate self-powered photodetectors based on PbS-quantum-dots/indium Schottky barrier diodes successfully. These devices exhibit excellent repeatability and stability at a high frequency (up to1 MHz), and show a typical fast rise time/fall time of ∼0.8 μs/3.2 μs. They also show excellent rectification ratios up to 10(4) with bias from -0.5 V to +0.5 V in the dark and a pronounced photovoltaic performance under light illumination. Moreover, the devices demonstrate high sensitivity in weak light illumination detection (detectivity) approaching 10(12) Jones and low noise currents <1 pAHz(-1/2)...
February 3, 2017: Nanotechnology
Ashok Bera, Ayon Das Mahapatra, Sulakshana Mondal, Durga Basak
Organic-inorganic hybrid diodes are very promising for solution processing, low cost, high performance optoelectronic devices. Here, we report a high quality p-n heterojunction diode composed of n-type inorganic Sb2S3 and p-type organic 2,2',7,7'-tetrakis-(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene (spiro-OMeTAD) with a rectification ratio of ∼10(2) at an applied bias of 1 V. On illumination with visible light (470 nm, 1.82 mW/cm(2)), the current value in our device becomes 8 × 10(2) times that of its dark value even at a zero bias condition...
December 21, 2016: ACS Applied Materials & Interfaces
Beibei Xu, Himanshu Chakraborty, Richard C Remsing, Michael L Klein, Shenqiang Ren
Magnetic-energy harvesting in a centimeter-sized free-standing (BEDT-TTF)C60 charge-transfer single crystal is demonstrated. The crystal shows sensitive magnetic-, thermal-, and mechanical-sensing ability, with an excellent piezoresistance coefficient of -5.1 × 10(-6) Pa(-1) . The self-powered sensing performance, together with its solution processability and flexibility, endow it with the capability of driving a new generation of noncontact magnetic-energy harvesting and sensing technologies.
February 2017: Advanced Materials
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