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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 5, 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...
December 6, 2016: 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 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.
December 20, 2016: Advanced Materials
Jiang Ouyang, Zhenjun Liu, Yajing Han, Ke Zeng, Jianping Sheng, Liu Deng, You-Nian Liu
Glycoproteins are important biomarkers and therapeutic targets in clinical diagnostics. The conventional analytical methods for glycoprotein are usually faced with some challenges, such as the complex pretreatment of samples, poor availability, and limited stability of antibody, making them not suitable for point-of-care and on-site application. Herein, we demonstrate a novel miniaturized biofuel cells (BFCs)-based self-powered nanosensor for the specific and sensitive determination of glycoproteins in complex samples through the combination of boronate-affinity molecularly imprinted polymer (MIP) and the boronate affinity functionalized biliroxidase-carbon nanotube nanocomposites...
December 28, 2016: ACS Applied Materials & Interfaces
Xiang Gao, Liang Huang, Bo Wang, Dingfeng Xu, Junwen Zhong, Zhimi Hu, Lina Zhang, Jun Zhou
Developing eco-friendly and low-cost electronics is an effective strategy to address the electronic waste issue. In this study, transparent cellulose nanopaper (T-paper) and polylactic acid (PLA) electret were used to construct a biodegradable and transparent paper-based electret nanogenerator. The nanogenerator could be assembled with paper products to form a self-powered smart packaging system without impairing the appearance, due to the high transparency and desirable output performance. Furthermore, the self-degradation property in the natural soil of the nanogenerator is demonstrated, indicating that the nanogenerator is recycled and will not pollute the environment...
December 28, 2016: ACS Applied Materials & Interfaces
Lingxia Zheng, Pingping Yu, Kai Hu, Feng Teng, Hongyu Chen, Xiaosheng Fang
Hybrid inorganic-organic photoelectric devices draw considerable attention because of their unique features by combining the tunable functionality of organic molecules and the superior intrinsic carrier mobilities of inorganic semiconductors. An ordered thin layer of TiO2 nanowells is formed in situ with shallow nanoconcave patterns without cracking with scalable production by a facile and economic strategy, and these layers are used as building blocks to construct hybrid UV photodetectors (PDs). Organic conducting polymers (polyaniline (PANI) with various morphologies) have been exploited as p-type materials, enabling tunable photodetection performances at zero bias...
December 14, 2016: ACS Applied Materials & Interfaces
Guoquan Suo, Yanhao Yu, Zhiyi Zhang, Shifa Wang, Ping Zhao, Jianye Li, Xudong Wang
Piezoelectric and triboelectric nanogenerators have been developed as rising energy-harvesting devices in the past few years to effectively convert mechanical energy into electricity. Here, a novel hybrid piezo/triboelectric nanogenerator based on BaTiO3 NP/PDMS composite film was developed in a simple and low-cost way. The effects of the BTO content and polarization degree on the output performance were systematically studied. The device with 20 wt % BTO in PDMS and a 100-μm-thick film showed the highest output power...
December 21, 2016: ACS Applied Materials & Interfaces
Aifang Yu, Xiangyu Chen, Haotian Cui, Libo Chen, Jianjun Luo, Wei Tang, Mingzeng Peng, Yang Zhang, Junyi Zhai, Zhong Lin Wang
Modern cryptography increasingly employs random numbers generated from physical sources in lieu of conventional software-based pseudorandom numbers, primarily owing to the great demand of unpredictable, indecipherable cryptographic keys from true random numbers for information security. Thus, far, the sole demonstration of true random numbers has been generated through thermal noise and/or quantum effects, which suffers from expensive and complex equipment. In this paper, we demonstrate a method for self-powered creation of true random numbers by using triboelectric technology to collect random signals from nature...
December 27, 2016: ACS Nano
Hulin Zhang, Jie Wang, Yuhang Xie, Guang Yao, Zhuocheng Yan, Long Huang, Sihong Chen, Taisong Pan, Liping Wang, Yuanjie Su, Weiqing Yang, Yuan Lin
Meteorologic monitoring plays a key role on weather forecast and disaster warning and deeply relies on various sensor networks. It is an optimal choice that grabbing the environmental energy around sensors for driving sensor network. Here, we demonstrate a self-powered, wireless, remote meteorologic monitoring system based on an innovative TENG. The TENG has been proved capable of scavenging wind energy and can be employed for self-powered, wireless meteorologic sounding. This work not only promotes the development of renewable energy harvesting, but also exploits and enriches promising applications based on TENGs for self-powered, wireless, remote sensing...
December 7, 2016: ACS Applied Materials & Interfaces
Huajing Fang, Chao Xu, Jie Ding, Qiang Li, Jia-Lin Sun, Ji-Yan Dai, Tian-Ling Ren, Qingfeng Yan
Photodetectors capable of detecting two or more bands simultaneously with a single system have attracted extensive attentions because of their critical applications in image sensing, communication, and so on. Here, we demonstrate a self-powered ultrabroadband photodetector monolithically integrated on a 0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 (PMN-28PT) single crystal. By combining the optothermal and pyroelectric effect, the multifunctional PMN-28PT single crystal can response to a wide wavelength range from UV to terahertz (THz)...
December 7, 2016: ACS Applied Materials & Interfaces
Hengyu Guo, Min-Hsin Yeh, Ying-Chih Lai, Yunlong Zi, Changsheng Wu, Zhen Wen, Chenguo Hu, Zhong Lin Wang
Recently, a self-charging power unit consisting of an energy harvesting device and an energy storage device set the foundation for building a self-powered wearable system. However, the flexibility of the power unit working under extremely complex deformations (e.g., stretching, twisting, and bending) becomes a key issue. Here, we present a prototype of an all-in-one shape-adaptive self-charging power unit that can be used for scavenging random body motion energy under complex mechanical deformations and then directly storing it in a supercapacitor unit to build up a self-powered system for wearable electronics...
November 22, 2016: ACS Nano
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