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Wang W, Jiang C, Tian S, Chen P, Xu K, Wu H, Yan L, Lu Y. Microsphere-assisted Fabry-Perot interferometry: proof of concept. APPLIED OPTICS 2022; 61:5442-5448. [PMID: 36256117 DOI: 10.1364/ao.455341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 05/19/2022] [Indexed: 06/16/2023]
Abstract
We propose a microsphere-assisted Fabry-Perot interferometry (MAFPI) for microstructure measurement. We stretch the single-mode fiber and combine it with microspheres of different sizes and refractive indices, which can form super-focused spots with different characteristics, that is, a photonic nanojet phenomenon. As a proof of principle, we performed scanning imaging of optical discs and holographic gratings by MAFPI. The optical disc image obtained by MAFPI is consistent with the result obtained by a scanning electron microscope, and the obtained grating image is consistent with the actual result.
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Pan C, Zhai J, Wang ZL. Piezotronics and Piezo-phototronics of Third Generation Semiconductor Nanowires. Chem Rev 2019; 119:9303-9359. [PMID: 31364835 DOI: 10.1021/acs.chemrev.8b00599] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
With the fast development of nanoscience and nanotechnology in the last 30 years, semiconductor nanowires have been widely investigated in the areas of both electronics and optoelectronics. Among them, representatives of third generation semiconductors, such as ZnO and GaN, have relatively large spontaneous polarization along their longitudinal direction of the nanowires due to the asymmetric structure in their c-axis direction. Two-way or multiway couplings of piezoelectric, photoexcitation, and semiconductor properties have generated new research areas, such as piezotronics and piezo-phototronics. In this review, an in-depth discussion of the mechanisms and applications of nanowire-based piezotronics and piezo-phototronics is presented. Research on piezotronics and piezo-phototronics has drawn much attention since the effective manipulation of carrier transport, photoelectric properties, etc. through the application of simple mechanical stimuli and, conversely, since the design of new strain sensors based on the strain-induced change in semiconductor properties.
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Affiliation(s)
- Caofeng Pan
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems , Chinese Academy of Sciences , Beijing 100083 , P. R. China.,School of Nanoscience and Technology , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Junyi Zhai
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems , Chinese Academy of Sciences , Beijing 100083 , P. R. China.,School of Nanoscience and Technology , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China
| | - Zhong Lin Wang
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems , Chinese Academy of Sciences , Beijing 100083 , P. R. China.,School of Nanoscience and Technology , University of Chinese Academy of Sciences , Beijing 100049 , P. R. China.,School of Material Science and Engineering , Georgia Institute of Technology , Atlanta , Georgia 30332 , United States
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Xiong D, Deng W, Tian G, Gao Y, Chu X, Yan C, Jin L, Su Y, Yan W, Yang W. A piezo-phototronic enhanced serrate-structured ZnO-based heterojunction photodetector for optical communication. NANOSCALE 2019; 11:3021-3027. [PMID: 30698573 DOI: 10.1039/c8nr09418g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
ZnO-based heterojunction photodetectors have been widely used in various fields such as optical imaging and health monitoring. As for the traditional planar heterojunction interface, their limited optical absorption will place restrictions on the full photoelectric potential of ZnO nanorods, which severely restrains the commercial applications of ZnO-based photodetectors. Herein, using an intrinsically octahedral structure of p-type Cu2O and one-dimensional ZnO arrays, the newly designed serrate-structured heterojunction was constructed, whose unique serrate-structured interface of ZnO/Cu2O is highly conducive to the aggrandizing of optical absorption. The as-fabricated photodetector could achieve a high on/off ratio up to 1000 and an optimum photocurrent of 24.90 μA under 1.41 mW mm-2 (405 nm) illumination without bias voltage, which was 2.5 times higher than that of the planar-structured photodetector, and the response time was as quick as 1.6 ms. When the additional external strain was 0.39%, the performance was dramatically enhanced more than 5 times due to the synergism of the piezo-phototronic effect and the serrate-structured design. Based on this, we successfully developed designed photodetector arrays with an excellent optical communication performance of transmitting information. Prospectively, this kind of unique serrate-structured heterojunction design will open up a possible opportunity for high performance photodetectors based on structural engineering.
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Affiliation(s)
- Da Xiong
- Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
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Facile and inexpensive fabrication of zinc oxide based bio-surfaces for C-reactive protein detection. Sci Rep 2018; 8:12687. [PMID: 30140055 PMCID: PMC6107546 DOI: 10.1038/s41598-018-30793-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 08/02/2018] [Indexed: 12/26/2022] Open
Abstract
The paper reports a biosensor formed from antibody coated ZnO nano-crystals which has been prepared using a rapid and inexpensive fabrication method which utilises colloidal dispersion enhanced using sonication. This technique was used to prepare highly ordered and uniform nano-crystalline sensor surfaces on polyethylene terephthalate (PET) using 0.5%, 1% and 5% concentrations of zinc oxide nano-crystal suspensions. Impedance spectroscopy was employed to interrogate the sensor surfaces and confirmed high reproducibility of the fabrication process. Changes in impedance values, at a frequency of 138 Hz, were used to establish dose dependent responses for C-reactive protein (CRP) antigen. A limit of detection of less than 1 ng/ml was demonstrated for nano-surfaces fabricated from concentrations of 1% ZnO.
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High carrier concentration ZnO nanowire arrays for binder-free conductive support of supercapacitors electrodes by Al doping. J Colloid Interface Sci 2016; 484:155-161. [DOI: 10.1016/j.jcis.2016.08.070] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 08/19/2016] [Accepted: 08/27/2016] [Indexed: 11/24/2022]
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Gutruf P, Zeller E, Walia S, Nili H, Sriram S, Bhaskaran M. Stretchable and Tunable Microtectonic ZnO-Based Sensors and Photonics. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:4532-4539. [PMID: 26044575 DOI: 10.1002/smll.201500729] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 05/10/2015] [Indexed: 06/04/2023]
Abstract
The concept of realizing electronic applications on elastically stretchable "skins" that conform to irregularly shaped surfaces is revolutionizing fundamental research into mechanics and materials that can enable high performance stretchable devices. The ability to operate electronic devices under various mechanically stressed states can provide a set of unique functionalities that are beyond the capabilities of conventional rigid electronics. Here, a distinctive microtectonic effect enabled oxygen-deficient, nanopatterned zinc oxide (ZnO) thin films on an elastomeric substrate are introduced to realize large area, stretchable, transparent, and ultraportable sensors. The unique surface structures are exploited to create stretchable gas and ultraviolet light sensors, where the functional oxide itself is stretchable, both of which outperform their rigid counterparts under room temperature conditions. Nanoscale ZnO features are embedded in an elastomeric matrix function as tunable diffraction gratings, capable of sensing displacements with nanometre accuracy. These devices and the microtectonic oxide thin film approach show promise in enabling functional, transparent, and wearable electronics.
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Affiliation(s)
- Philipp Gutruf
- Functional Materials and Microsystems Research Group and Micro Nano Research Facility, RMIT University, Melbourne, 3001, Victoria, Australia
| | - Eike Zeller
- Functional Materials and Microsystems Research Group and Micro Nano Research Facility, RMIT University, Melbourne, 3001, Victoria, Australia
| | - Sumeet Walia
- Functional Materials and Microsystems Research Group and Micro Nano Research Facility, RMIT University, Melbourne, 3001, Victoria, Australia
| | - Hussein Nili
- Functional Materials and Microsystems Research Group and Micro Nano Research Facility, RMIT University, Melbourne, 3001, Victoria, Australia
| | - Sharath Sriram
- Functional Materials and Microsystems Research Group and Micro Nano Research Facility, RMIT University, Melbourne, 3001, Victoria, Australia
| | - Madhu Bhaskaran
- Functional Materials and Microsystems Research Group and Micro Nano Research Facility, RMIT University, Melbourne, 3001, Victoria, Australia
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Zheng X, Yan X, Sun Y, Bai Z, Zhang G, Shen Y, Liang Q, Zhang Y. Au-embedded ZnO/NiO hybrid with excellent electrochemical performance as advanced electrode materials for supercapacitor. ACS APPLIED MATERIALS & INTERFACES 2015; 7:2480-2485. [PMID: 25584699 DOI: 10.1021/am5073468] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Here we design a nanostructure by embedding Au nanoparticles into ZnO/NiO core-shell composites as supercapacitors electrodes materials. This optimized hybrid electrodes exhibited an excellent electrochemical performance including a long-term cycling stability and a maximum specific areal capacitance of 4.1 F/cm(2) at a current density of 5 mA/cm(2), which is much higher than that of ZnO/NiO hierarchical materials (0.5 F/cm(2)). Such an enhanced property is attributed to the increased electro-electrolyte interfaces, short electron diffusion pathways and good electrical conductivity. Apart from this, electrons can be temporarily trapped and accumulated at the Fermi level (EF') because of the localized schottky barrier at Au/NiO interface in charge process until fill the gap between ZnO and NiO, so that additional electrons can be released during discharge. These results demonstrate that suitable interface engineering may open up new opportunities in the development of high-performance supercapacitors.
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Affiliation(s)
- Xin Zheng
- State Key Laboratory for Advanced Metals and Materials, School of Materials Science and Engineering, University of Science and Technology Beijing , Beijing 100083, People's Republic of China
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Song HJ, Lv D, Wang JB, Li B, Zhong XL, Jia LH, Wang F. Multi-channel ferroelectric-gate field effect transistors with excellent performance based on ZnO nanofibers. RSC Adv 2014. [DOI: 10.1039/c4ra04937c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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