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Wei Y, Liu X, Miao Y, Liu Y, Wang C, Ying X, Zhang G, Gu H, Zhang M, Chen H. A high-responsivity CsPbBr 3 nanowire photodetector induced by CdS@Cd xZn 1-xS gradient-alloyed quantum dots. NANOSCALE HORIZONS 2022; 7:644-654. [PMID: 35583596 DOI: 10.1039/d2nh00149g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Benefitting from excellent thermal and moisture stability, inorganic halide perovskite materials have established themselves quickly as promising candidates for fabricating photoelectric devices. However, due to their high trap state density and rapid carrier recombination rate, the photoelectric conversion efficiencies of current inorganic halide perovskite materials are still lower than expected. Here, after systematic research on the optoelectronic properties of CsPbBr3 nanowires (NWs) decorated with binary CdS quantum dots (QDs), CdS@ZnS core/shell QDs, and gradient-alloyed CdS@CdxZn1-xS QDs, respectively, we proposed a facile method to improve the quantum efficiency of perovskite-based photodetectors with low cost, in which the aforementioned QDs are firstly integrated with CsPbBr3 NWs, which act as a photosensitive layer. Notably, the responsivity of the CsPbBr3 NW photodetector decorated with CdS@CdxZn1-xS QDs was enhanced about 10-fold compared to that of pristine CsPbBr3 NW devices. This value is far superior to those for hybrids composed of binary CdS QDs and CdS@ZnS core/shell QDs. The high responsivity enhancement phenomena are interpreted based on the unique funnel-shaped energy level of CdS@CdxZn1-xS QDs, which is favorable for light-harvesting and photocarrier separation. This work indicates that our unique QD/NW hybrid nanostructure is a desirable building block for fabricating high-performance photodetectors.
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Affiliation(s)
- Ying Wei
- School of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, P. R. China.
| | - Xiao Liu
- School of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, P. R. China.
| | - Yu Miao
- Laboratory of Quantum Engineering and Quantum Material, School of Physics and Telecommunication Engineering, South China Normal University, Guangzhou 510006, P. R. China
| | - Yuxin Liu
- School of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, P. R. China.
| | - Chuanglei Wang
- School of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, P. R. China.
| | - Xiangjing Ying
- School of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, P. R. China.
| | - Gaotian Zhang
- School of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, P. R. China.
| | - Huaimin Gu
- School of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, P. R. China.
| | - Menglong Zhang
- School of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, P. R. China.
| | - Hongyu Chen
- School of Semiconductor Science and Technology, South China Normal University, Guangzhou 510631, P. R. China.
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Chan MH, Chang ZX, Huang CYF, Lee LJ, Liu RS, Hsiao M. Integrated therapy platform of exosomal system: hybrid inorganic/organic nanoparticles with exosomes for cancer treatment. NANOSCALE HORIZONS 2022; 7:352-367. [PMID: 35043812 DOI: 10.1039/d1nh00637a] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Recent studies have found that exosomes or extracellular vehicles (EVs) are associated with cancer metastasis, disease progression, diagnosis, and treatment, leading to a rapidly emerging area of exocrine vesicle research. Relying on the superior targeting function and bio-compatibility of exosomes, researchers have been able to deliver drugs to cancer stem cells deep within tumors in mouse models. Despite significant efforts made in this relatively new field of exosome research, progress has been held back by challenges such as inefficient separation methods, difficulties in characterization/tracking, and a lack of specific biomarkers. Therefore, current researches are devoted to combining nanomaterials with exosomes to improve these shortcomings. Adding inorganic/organic nanoparticles such as artificial liposomes and iron oxide can bring more drug options and various fluorescent or magnetic diagnostic possibilities to the exosome system. Moreover, the applications of exosomes need to be further evaluated under actual physiological conditions. This review article highlights the potential of exosome-biomimetic nanoparticles for their use as drug carriers to improve the efficacy of anticancer therapy.
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Affiliation(s)
- Ming-Hsien Chan
- Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan.
| | - Zhi-Xuan Chang
- Institute of Biopharmaceutical Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Chi-Ying F Huang
- Institute of Biopharmaceutical Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - L James Lee
- Institute of Biopharmaceutical Sciences, National Yang Ming Chiao Tung University, Taipei, Taiwan
- Department of Chemical and Biomolecular Engineering, Ohio State University, Columbus, 43210, Ohio, USA
| | - Ru-Shi Liu
- Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan.
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan.
| | - Michael Hsiao
- Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan.
- Department of Biochemistry, College of Medicine, Kaohsiung Medical University, Kaohsiung 807, Taiwan.
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Ultraviolet Detectors Based on Wide Bandgap Semiconductor Nanowire: A Review. SENSORS 2018; 18:s18072072. [PMID: 29958452 PMCID: PMC6068994 DOI: 10.3390/s18072072] [Citation(s) in RCA: 146] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 06/05/2018] [Accepted: 06/27/2018] [Indexed: 12/25/2022]
Abstract
Ultraviolet (UV) detectors have attracted considerable attention in the past decade due to their extensive applications in the civil and military fields. Wide bandgap semiconductor-based UV detectors can detect UV light effectively, and nanowire structures can greatly improve the sensitivity of sensors with many quantum effects. This review summarizes recent developments in the classification and principles of UV detectors, i.e., photoconductive type, Schottky barrier type, metal-semiconductor-metal (MSM) type, p-n junction type and p-i-n junction type. The current state of the art in wide bandgap semiconductor materials suitable for producing nanowires for use in UV detectors, i.e., metallic oxide, III-nitride and SiC, during the last five years is also summarized. Finally, novel types of UV detectors such as hybrid nanostructure detectors, self-powered detectors and flexible detectors are introduced.
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Ahmad R, Srivastava R, Yadav S, Singh D, Gupta G, Chand S, Sapra S. Functionalized Molybdenum Disulfide Nanosheets for 0D-2D Hybrid Nanostructures: Photoinduced Charge Transfer and Enhanced Photoresponse. J Phys Chem Lett 2017; 8:1729-1738. [PMID: 28350471 DOI: 10.1021/acs.jpclett.7b00243] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The high-concentration stable dispersion of free-standing mono- or few-layer transition metal dichalcogenide (TMD) nanosheets (NSs) remains a significant barrier for their application in solution-processed optoelectronic devices. Here, we report oleylamine (OLA)- and dodecanethiol (DDT)-assisted exfoliation of MoS2 NSs in nonpolar organic solvent 1,2-dichlorobenzene (DCB), which enables high-concentration stable dispersion of free-standing mono- or few-layer NSs. The functionalized MoS2 NSs were further utilized for the fabrication of solution-processed 0D-2D hybrids of CuInS2 quantum dots (CIS QDs) and MoS2 NSs. The strong photoluminescence (PL) quenching and decreased PL lifetimes of CIS QDs attached to MoS2 NSs indicates efficient charge transfer from photoexcited CIS to MoS2 NSs. The photocurrent of CIS/MoS2 hybrid devices is dramatically enhanced compared to that of pure CIS and pristine MoS2-based devices, confirming that efficient charge separation and transfer occur from CIS QDs to MoS2 NSs.
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Affiliation(s)
- Razi Ahmad
- Center for Organic Electronics, Physics of Energy Harvesting Division, CSIR-National Physical Laboratory , Dr. K.S. Krishnan Road, New Delhi 110012, India
- Department of Chemistry, Indian Institute of Technology Delhi , New Delhi, India 110016
| | - Ritu Srivastava
- Center for Organic Electronics, Physics of Energy Harvesting Division, CSIR-National Physical Laboratory , Dr. K.S. Krishnan Road, New Delhi 110012, India
| | - Sushma Yadav
- Department of Chemistry, Indian Institute of Technology Delhi , New Delhi, India 110016
| | - Dinesh Singh
- Sophisticated Analytical Equipment Division, CSIR-National Physical Laboratory , Dr. K.S. Krishnan Road, New Delhi 110012, India
| | - Govind Gupta
- Advanced Materials & Devices, CSIR-National Physical Laboratory , Dr. K.S. Krishnan Road, New Delhi 110012, India
| | - Suresh Chand
- Center for Organic Electronics, Physics of Energy Harvesting Division, CSIR-National Physical Laboratory , Dr. K.S. Krishnan Road, New Delhi 110012, India
| | - Sameer Sapra
- Department of Chemistry, Indian Institute of Technology Delhi , New Delhi, India 110016
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Lee SH, Bae J, Lee SW, Jang JW. Improvement of polypyrrole nanowire devices by plasmonic space charge generation: high photocurrent and wide spectral response by Ag nanoparticle decoration. NANOSCALE 2015; 7:17328-17337. [PMID: 26413791 DOI: 10.1039/c5nr04537a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this study, improvement of the opto-electronic properties of non-single crystallized nanowire devices with space charges generated by localized surface plasmon resonance (LSPR) is demonstrated. The photocurrent and spectral response of single polypyrrole (PPy) nanowire (NW) devices are increased by electrostatically attached Ag nanoparticles (Ag NPs). To take advantage of plasmon-exciton coupling in the photocurrent of the device, 80 nm of Ag NPs (454 nm = λmax) were chosen for matching the maximum absorption with PPy NWs (442 nm = λmax). The photocurrent density is remarkably improved, up to 25.3 times (2530%), by the Ag NP decoration onto the PPy NW (PPyAgNPs NW) under blue light (λ = 425-475 nm) illumination. In addition, the PPyAgNPs NW shows a photocurrent decay time twice that of PPy NW, as well as an improved spectral response of the photocurrent. The improved photocurrent efficiency, decay time, and spectral response resulted from the space charges generated by the LSPR of Ag NPs. Furthermore, the increasing exponent (m) of the photocurrent (JPC ∼ V(m)) and finite-differential time domain (FDTD) simulation straightforwardly indicate relatively large plasmonic space charge generation under blue light illumination. These results prove that the performance of non-single crystallized polymer nanowire devices can also be improved by plasmonic enhancement.
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Affiliation(s)
- S-H Lee
- Department of Physics, Pukyong National University, Busan 48513, Republic of Korea.
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Yakunin S, Dirin DN, Protesescu L, Sytnyk M, Tollabimazraehno S, Humer M, Hackl F, Fromherz T, Bodnarchuk MI, Kovalenko MV, Heiss W. High infrared photoconductivity in films of arsenic-sulfide-encapsulated lead-sulfide nanocrystals. ACS NANO 2014; 8:12883-94. [PMID: 25470412 PMCID: PMC4278417 DOI: 10.1021/nn5067478] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Accepted: 12/03/2014] [Indexed: 05/21/2023]
Abstract
Highly photoconductive thin films of inorganic-capped PbS nanocrystal quantum dots (QDs) are reported. Stable colloidal dispersions of (NH4)3AsS3-capped PbS QDs were processed by a conventional dip-coating technique into a thin homogeneous film of electronically coupled PbS QDs. Upon drying at 130 °C, (NH4)3AsS3 capping ligands were converted into a thin layer of As2S3, acting as an infrared-transparent semiconducting glue. Photodetectors obtained by depositing such films onto glass substrates with interdigitate electrode structures feature extremely high light responsivity and detectivity with values of more than 200 A/W and 1.2×10(13) Jones, respectively, at infrared wavelengths up to 1400 nm. Importantly, these devices were fabricated and tested under ambient atmosphere. Using a set of time-resolved optoelectronic experiments, the important role played by the carrier trap states, presumably localized on the arsenic-sulfide surface coating, has been elucidated. Foremost, these traps enable a very high photoconductive gain of at least 200. The trap state density as a function of energy has been plotted from the frequency dependence of the photoinduced absorption (PIA), whereas the distribution of lifetimes of these traps was recovered from PIA and photoconductivity (PC) phase spectra. These trap states also have an important impact on carrier dynamics, which led us to propose a kinetic model for trap state filling that consistently describes the experimental photoconductivity transients at various intensities of excitation light. This model also provides realistic values for the photoconductive gain and thus may serve as a useful tool to describe photoconductivity in nanocrystal-based solids.
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Affiliation(s)
- Sergii Yakunin
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstraße 69, Linz 4040, Austria
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zurich CH-8093, Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstraße 129, Dübendorf CH-8600, Switzerland
| | - Dmitry N. Dirin
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zurich CH-8093, Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstraße 129, Dübendorf CH-8600, Switzerland
| | - Loredana Protesescu
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zurich CH-8093, Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstraße 129, Dübendorf CH-8600, Switzerland
| | - Mykhailo Sytnyk
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstraße 69, Linz 4040, Austria
| | - Sajjad Tollabimazraehno
- Zentrum für Oberflächen- und Nanoanalytik, University Linz, Altenbergerstraße 69, Linz 4040, Austria
| | - Markus Humer
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstraße 69, Linz 4040, Austria
| | - Florian Hackl
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstraße 69, Linz 4040, Austria
| | - Thomas Fromherz
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstraße 69, Linz 4040, Austria
| | - Maryna I. Bodnarchuk
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zurich CH-8093, Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstraße 129, Dübendorf CH-8600, Switzerland
| | - Maksym V. Kovalenko
- Department of Chemistry and Applied Biosciences, ETH Zürich, Vladimir-Prelog-Weg 1, Zurich CH-8093, Switzerland
- Empa-Swiss Federal Laboratories for Materials Science and Technology, Überlandstraße 129, Dübendorf CH-8600, Switzerland
| | - Wolfgang Heiss
- Institute of Semiconductor and Solid State Physics, Johannes Kepler University Linz, Altenbergerstraße 69, Linz 4040, Austria
- Materials for Electronics and Energy Technology (i-MEET), Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstraße 7, 91058 Erlangen, Germany
- Energie Campus Nürnberg (EnCN), Fürther Straße 250, 90429 Nürnberg, Germany
- Address correspondence to
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Ultrasmall SnO₂ nanocrystals: hot-bubbling synthesis, encapsulation in carbon layers and applications in high capacity Li-ion storage. Sci Rep 2014; 4:4647. [PMID: 24732294 PMCID: PMC3986698 DOI: 10.1038/srep04647] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 03/25/2014] [Indexed: 11/28/2022] Open
Abstract
Ultrasmall SnO2 nanocrystals as anode materials for lithium-ion batteries (LIBs) have been synthesized by bubbling an oxidizing gas into hot surfactant solutions containing Sn-oleate complexes. Annealing of the particles in N2 carbonifies the densely packed surface capping ligands resulting in carbon encapsulated SnO2 nanoparticles (SnO2/C). Carbon encapsulation can effectively buffer the volume changes during the lithiation/delithiation process. The assembled SnO2/C thus deliver extraordinarily high reversible capacity of 908 mA·h·g−1 at 0.5 C as well as excellent cycling performance in the LIBs. This method demonstrates the great potential of SnO2/C nanoparticles for the design of high power LIBs.
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Zheng X, Sun Y, Yan X, Chen X, Bai Z, Lin P, Shen Y, Zhao Y, Zhang Y. Tunable channel width of a UV-gate field effect transistor based on ZnO micro-nano wire. RSC Adv 2014. [DOI: 10.1039/c4ra01661k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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