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Evgenia Gilshteyn, Daler Amanbaev, Maxim Silibin, Artem Sysa, Vladislav Kondrashov, Anton Anisimov, Tanja Kallio, Albert Nasibulin
The integration of the energy harvesting and energy storage in a single device both enables the conversion of the ambient energy into electricity and provides a sustainable power source for various electronic devices and systems. On the other hand, mechanical flexibility coupled with optical transparency of the energy storage devices is required for many applications, ranging from self-powered rolled-up displays to wearable optoelectronic devices. We integrate a piezoelectric poly(vinylidene-trifluoroethylene) film into a flexible supercapacitor system to harvest and store the energy...
May 21, 2018: Nanotechnology
Parikshit Sahatiya, Akash Shinde, Sushmee Badhulika
Even though 2D ZnO has been utilized for enhanced self-powered sensing by strain modulation due to its piezoelectric property, study on utilizing pyroelectric property of ZnO remains unexplored. The piezoelectric property of 2D ZnO works on mechanical strain which disrupts the structure of ZnO leading to the failure of device. For pyroelectric nanogenerator, temperature difference can be triggered by external light source which does not disrupt the ZnO structure and also avoids the need for physical bending/pressing as in case of piezoelectric nanogenerator...
May 21, 2018: Nanotechnology
Ran Cao, Xianjie Pu, Xinyu Du, Wei Yang, Jiaona Wang, Hengyu Guo, Shuyu Zhao, Zuqing Yuan, Chi Zhang, Congju Li, Zhong Lin Wang
Electronic textile (E-textile) with designable electric circuit and multi-functionalities holds great application prospect for future wearable electronics. However, most of the E-textiles still have critical challenges, including air permeability, satisfactory washability and massive fabrication. In this work, we fabricate a washable E-textile that addresses all of the concerns and show its application as a self-powered triboelectric gesture textile for intelligent human-machine interface. Utilizing conductive carbon nanotubes (CNTs) and screen-printing technology, this kind of E-textile embraces high conductivity (0...
May 17, 2018: ACS Nano
Xinxin Xiao, Edmond Magner
A quasi-solid-state and flexible biofuel cell using a hydrogel electrolyte preloaded with sugar as a fuel is described. The device can function as a self-powered biosupercapacitor delivering pulses for over 600 cycles, with a power density over 10 times higher than that from the biofuel cell alone.
May 14, 2018: Chemical Communications: Chem Comm
Chengcheng Gu, Panpan Gai, Lei Han, Wen Yu, Qingyun Liu, Feng Li
We developed a facile and ultrasensitive enzymatic biofuel cell (EBFC)-based self-powered biosensor of protein kinase A (PKA) activity and inhibition via thiophosphorylation-mediated interface engineering. The detection limit was down to 0.00022 U mL-1 (S/N = 3). In addition, the PKA activities from MCF-7 and A549 cell lysates were analyzed and achieved reliable results.
May 10, 2018: Chemical Communications: Chem Comm
Venkateswaran Vivekananthan, Nagamalleswara Rao Alluri, Yuvasree Purusothaman, Arunkumar Chandrasekhar, Sophia Selvarajan, Sang-Jae Kim
In contrast with the conventional ceramic/oxide humidity sensors (HS), a self-powered piezoelectric biopolymer (SP-PB)-HS with reasonable sensitivity, reliability, non-toxic, and eco-friendly nature is highly desirable. A piezoelectric nanogenerator (PNG) driven biopolymer based HS provides a pathway towards a sustainable and greener environment in the field of smart sensors. For that, a piezoelectric collagen-nanofibrils (PCNF) biopolymer coated on to a cotton fabric has dual functionality (energy harvesting and sensor)...
May 10, 2018: ACS Applied Materials & Interfaces
Younghoon Lee, Seung Hee Cha, Yong-Woo Kim, Dukhyun Choi, Jeong-Yun Sun
Human-machine interfaces have benefited from the advent of wireless sensor networks and the internet of things, but rely on wearable/attachable electronics exhibiting stretchability, biocompatibility, and transmittance. Limited by weight and volume, wearable devices should be energy efficient and even self-powered. Here, we report practical approaches for obtaining a stably self-cleanable, transparent and attachable ionic communicator based on triboelectric nanogenerators. The communicator can be easily applied on human skin due to softness and chemically anchored robust layers...
May 4, 2018: Nature Communications
Yanbin Luo, Xin Yan, Jinnan Zhang, Bang Li, Yao Wu, Qichao Lu, Chenxiaoshuai Jin, Xia Zhang, Xiaomin Ren
A graphene/nanowire Schottky junction is a promising structure for low-cost high-performance optoelectronic devices. Here we demonstrate a graphene/single GaAs nanowire Schottky junction photovoltaic device. The Schottky junction is fabricated by covering a single layer graphene onto an n-doped GaAs nanowire. Under 532 nm laser excitation, the device exhibits a high responsivity of 231 mA W-1 and a short response/recover time of 85/118 μs at zero bias. Under AM 1.5 G solar illumination, the device has an open-circuit voltage of 75...
May 4, 2018: Nanoscale
Kuntal Maity, Dipankar Mandal
Rapid development of wearable electronics, piezoelectric nanogenerator (PNG) has been paid a special attention due to its sustainable and accessible energy generation. In this context, we present a simple yet highly efficient design strategy to enhance the output performance of an all organic PNG (OPNG) based on multilayer assembled electrospun poly(vinyledine fluoride) (PVDF) nanofibers (NFs) mats where vapor phase polymerized poly(3,4- ethylenedioxythiphene) (PEDOT) coated PVDF NFs are assembled as electrodes and neat PVDF NFs is utilized as an active component...
May 4, 2018: ACS Applied Materials & Interfaces
Zuqing Yuan, Xinyu Du, Nianwu Li, Yingying Yin, Ran Cao, Xiuling Zhang, Shuyu Zhao, Huidan Niu, Tao Jiang, Weihua Xu, Zhong Lin Wang, Congju Li
Private and security information for personal identification requires an encrypted tool to extend communication channels between human and machine through a convenient and secure method. Here, a triboelectric-based transparent secret code (TSC) that enables self-powered sensing and information identification simultaneously in a rapid process method is reported. The transparent and hydrophobic TSC can be conformed to any cambered surface due to its high flexibility, which extends the application scenarios greatly...
April 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
Longfei Wang, Shuhai Liu, Guoyun Gao, Yaokun Pang, Xin Yin, Xiaolong Feng, Laipan Zhu, Yu Bai, Libo Chen, Tianxiao Xiao, Xudong Wang, Yong Qin, Zhong Lin Wang
Silicon transistors rapidly approaching their scaling limit due to the short-channel effects, alternative technologies are being urgently needed for the next-generation electronics. Here, we demonstrate ultrathin ZnO piezotronic transistors with a ~2-nm physical channel length using the inner crystal self-generated out-of-plane piezopotential as the gate voltage to control the carriers transport. This design removes the need for external gate electrodes that are challenging at nanometer scale. These ultrathin devices exhibit a strong piezotronic effect and excellent pressure-switching characteristics...
April 27, 2018: ACS Nano
Fei Xue, Junwei Zhang, Weijin Hu, Wei-Ting Hsu, Ali Han, Siu-Fung Leung, Jing-Kai Huang, Yi Wan, Shuhai Liu, Junli Zhang, Jr-Hau He, Wen-Hao Chang, Zhong Lin Wang, Xixiang Zhang, Lain-Jong Li
Piezoelectric materials have been widely used for sensors, actuators, electronics, and energy conversion. Two-dimensional (2D) ultrathin semiconductors, such as monolayer h-BN and MoS2 with their atom-level geometry, are currently emerging as new and attractive members of the piezoelectric family. However, their piezoelectric polarization is commonly limited to the in-plane direction of odd-number ultrathin layers, largely restricting their application in integrated nanoelectromechanical systems. Recently, theoretical calculations have predicted the existence of out-of-plane and in-plane piezoelectricity in monolayer α-In2 Se3 ...
April 30, 2018: ACS Nano
Yu Han, Jingdian Zou, Zhen Li, Wenqiang Wang, Yang Jie, Jinming Ma, Bin Tang, Qi Zhang, Xia Cao, Shengming Xu, Zhong Lin Wang
In recent years, research in lithium-ion batteries (LIBs) has been focused on improving their performance in various ways, such as density, capacity and life time, but little attention has been paid to the energy consumption costed in the manufacturing process. Herein, we report an energy-efficient preparation method of anode materials for LIBs based on a self-powered electrospinning system without an external power source, which consists of a rotatory triboelectric nanogenerator (r-TENG), a power management circuit and an electrospinning unit...
April 23, 2018: ACS Nano
Xiangdan Meng, Wenhao Dai, Kai Zhang, Haifeng Dong, Xueji Zhang
Herein, we design a smart autonomous ATP self-powered strand-displacement cascade amplification (SDCA) system for highly sensitive multiple intracellular miRNA detection. Rationally engineered Y-motif DNA structures are functionalized on mesoporous silica-coated copper sulfide nanoparticles loaded with numerous ATPs (CuS@mSiO2 -Y/ATP) through pH stimulus-responsive disulfide bonds. The SDCA system is implemented by endogenous specific miRNA as a trigger and ATP as fuel released from the nanocarrier at acidic pH and photothermal stimuli-responsive CuS...
February 7, 2018: Chemical Science
Jayaraman Theerthagiri, K Karuppasamy, Govindarajan Durai, Abu Ul Hassan Sarwar Rana, Prabhakarn Arunachalam, Kirubanandam Sangeetha, Parasuraman Kuppusami, Hyun-Seok Kim
Supercapacitors (SCs) have received a great deal of attention and play an important role for future self-powered devices, mainly owing to their higher power density. Among all types of electrical energy storage devices, electrochemical supercapacitors are considered to be the most promising because of their superior performance characteristics, including short charging time, high power density, safety, easy fabrication procedures, and long operational life. An SC consists of two foremost components, namely electrode materials, and electrolyte...
April 19, 2018: Nanomaterials
Jiawei Lai, Xin Liu, Junchao Ma, Qinsheng Wang, Kenan Zhang, Xiao Ren, Yinan Liu, Qiangqiang Gu, Xiao Zhuo, Wei Lu, Yang Wu, Yuan Li, Ji Feng, Shuyun Zhou, Jian-Hao Chen, Dong Sun
Photodetectors based on Weyl semimetal promise extreme performance in terms of highly sensitive, broadband and self-powered operation owing to its extraordinary material properties. Layered Type-II Weyl semimetal that break Lorentz invariance can be further integrated with other two-dimensional materials to form van der Waals heterostructures and realize multiple functionalities inheriting the advantages of other two-dimensional materials. Herein, we report the realization of a broadband self-powered photodetector based on Type-II Weyl semimetal Td -MoTe2 ...
April 17, 2018: Advanced Materials
Gengrui Zhao, Xiaodi Zhang, Xin Cui, Shu Wang, Zhirong Liu, Lin Deng, Anhui Qi, Xiran Qiao, Lijie Li, Caofeng Pan, Yan Zhang, Linlin Li
To meet the growing demands in flexible and wearable electronics, various sensors have been designed for detecting and monitoring the physical quantity changes. However, most of these sensors can only detect one certain kind of physical quantity based on a single mechanism. In this paper, we have fabricated a multifunctional sensor made from carbonized electrospun polyacrylonitrile/barium titanate (PAN-C/BTO) nanofiber film. It can detect two physical quantities (pressure and curvature), independently and simultaneously, by integrating piezoresistive, piezoelectric and triboelectric effect...
April 17, 2018: ACS Applied Materials & Interfaces
Haiwu Zheng, Yunlong Zi, Xu He, Hengyu Guo, Ying-Chih Lai, Jie Wang, Steven L Zhang, Changsheng Wu, Gang Cheng, Zhong Lin Wang
Harvesting energy available from ambient environment is highly desirable for powering personal electronics and health applications. Due to natural process and human activities, steam can be produced by boilers, human perspiration and the wind exists ubiquitously. In the outdoor environment, these two phenomena usually exist at the same place, which contain heat and mechanical energies simultaneously. However, previous studies have isolated them as separate sources of energy to harvest and hence failed to utilize them effectively...
April 16, 2018: ACS Applied Materials & Interfaces
Ruijie Qi, Jinhui Nie, Mingyang Liu, Mengyang Xia, Xianmao Lu
Stretchable energy storage devices are of great importance for the viable applications of wearable/stretchable electronics. Studies on stretchable energy storage devices, especially supercapacitors (SCs), have shown encouraging progress. However, challenges still remain in the pursuit of high specific capacitances and facile fabrication methods. Herein, we report a modular materials fabrication and assembly process for stretchable SCs. With a V2O5/PEDOT composite as the active material, the resulting stretchable SCs exhibited high areal specific capacitances up to 240 mF cm-2 and good capacitance retention at a strain of 50%...
April 16, 2018: Nanoscale
Shuaishuai Li, Tao Wang, Xiaoshuang Chen, Wei Lu, Yiqun Xie, Yibin Hu
High polarization sensitivity, suppressed dark current and low energy consumption are all desirable device properties for photodetectors. In this work, we propose phosphorene-based photodetectors that are driven using photogalvanic effects (PGEs). The inversion symmetry of pristine phosphorene is broken using either application of an out-of-plane gate voltage or a heterostructure that is composed of the original phosphorene and blue phosphorene. The potential asymmetry enables PGEs under illumination by polarized light...
April 13, 2018: Nanoscale
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