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Kalimuthu R, Meenachi Sellan K, Antony D, Rajaprakasam S, Chokkalingam V, Chidambaram P, Kanagarajan S. Nanopriming Action of Microwave-Assisted Biofunctionalized ZnO Nanoparticles to Enhance the Growth under Moisture Stress in Vigna radiata. ACS OMEGA 2023; 8:28143-28155. [PMID: 37576682 PMCID: PMC10413846 DOI: 10.1021/acsomega.3c01329] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2023] [Accepted: 07/13/2023] [Indexed: 08/15/2023]
Abstract
Bare and stabilized zinc oxide nanoparticles (ZnO NPs) were prepared by a microwave-assisted method and used as a priming agent to improve the morphological, physiological, and biochemical quality of Vigna radiata. The priming action was made under normal and moisture stress conditions. A microwave reactor of 850 watts power was used to heat 30 mL of a nanocolloidal solution at 140 °C for 20 min. The stable spherical ZnO NPs at 50.4 mV with 28.2 nm particle size were generated and capped with different biomolecules, cysteine and PVA, to get biostabilized ZnO NPs at 48.8 and 108.5 nm with ζ potentials of -56.2 and -52.0 mV, respectively, holding distinct morphology. The nanopriming effect was studied in V. radiata seeds for bare ZnO and capped ZnO NPs under normal and moisture stress environments. Cysteine-capped ZnO NPs at 250 ppm showed improved germination (90 and 76%), radicle growth (7.6 and 3.6 cm), seedling Vigor (3064 and 1816), dry matter production (145.06 and 96.92 mg/25 seedlings), and hydrolytic (α-amylase and protease) and antioxidant (peroxidase and superoxide dismutase) enzyme activity under normal and moisture stress conditions. The improved priming action of cysteine-capped ZnO NPs is due to increased cell elongation and cell division in the radicle. The uptake and translocation of ZnO NPs in the V. radiata root are evidenced by the presence of an 11.4 ppm zinc level, which was also supported by EDAX and FITC labeling results.
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Affiliation(s)
- Raja Kalimuthu
- Anbil
Dharmalingam Agricultural College & Research Institute, TNAU, Trichy 620027, Tamil Nadu, India
| | | | - Dhivya Antony
- Department
of Chemistry, Dhanalakshmi Srinivasan Arts
and Science (co-education) College (Affiliated to University of Madras), Mamallapuram, Chennai 603104, Tamil
Nadu, India
| | - Sudhagar Rajaprakasam
- Plant
Breeding and Genetics, Tamil Nadu Agricultural
University, TNAU, Coimbatore 641 003, India
| | - Vanniarajan Chokkalingam
- Anbil
Dharmalingam Agricultural College & Research Institute, TNAU, Trichy 620027, Tamil Nadu, India
| | - Prabu Chidambaram
- Department
of Environmental Science, Tamil Nadu Agricultural
University, Coimbatore 641 003, India
| | - Selvaraju Kanagarajan
- Department
of Plant Breeding, Swedish University of
Agricultural Sciences, P.O. Box 190, 234 22 Lomma, Sweden
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2
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Ren H, Xiang G. Morphology-Dependent Room-Temperature Ferromagnetism in Undoped ZnO Nanostructures. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:3199. [PMID: 34947546 PMCID: PMC8708357 DOI: 10.3390/nano11123199] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 11/18/2021] [Accepted: 11/19/2021] [Indexed: 01/19/2023]
Abstract
Since Dietl et al. predicted that Co-doped ZnO may show room-temperature ferromagnetism (RTFM) in 2000, researchers have focused on the investigation of ferromagnetic ZnO doped with various transition metals. However, after decades of exploration, it has been found that undoped ZnO nanostructures can also show RTFM, which in general is dependent on ZnO morphologies. Here, we will give an overall review on undoped ZnO nanomaterials with RTFM. The advanced strategies to achieve multidimensional (quasi-0D, 1D, 2D, and 3D) ferromagnetic ZnO nanostructures and the mechanisms behind RTFM are systematically presented. We have successfully prepared ferromagnetic nanostructures, including thin films, horizontal arrays and vertical arrays. The existing challenges, including open questions about quantum-bound ZnO nanostructures, are then discussed.
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Affiliation(s)
- Hongtao Ren
- School of Materials Science and Engineering, Liaocheng University, Hunan Road No. 1, Liaocheng 252000, China
| | - Gang Xiang
- College of Physics, Sichuan University, Wangjiang Road No. 29, Chengdu 610064, China
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3
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Koo WT, Cho HJ, Kim DH, Kim YH, Shin H, Penner RM, Kim ID. Chemiresistive Hydrogen Sensors: Fundamentals, Recent Advances, and Challenges. ACS NANO 2020; 14:14284-14322. [PMID: 33124428 DOI: 10.1021/acsnano.0c05307] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Hydrogen (H2) is one of the next-generation energy sources because it is abundant in nature and has a high combustion efficiency that produces environmentally benign products (H2O). However, H2/air mixtures are explosive at H2 concentrations above 4%, thus any leakage of H2 must be rapidly and reliably detected at much lower concentrations to ensure safety. Among the various types of H2 sensors, chemiresistive sensors are one of the most promising sensing systems due to their simplicity and low cost. This review highlights the advances in H2 chemiresistors, including metal-, semiconducting metal oxide-, carbon-based materials, and other materials. The underlying sensing mechanisms for different types of materials are discussed, and the correlation of sensing performances with nanostructures, surface chemistry, and electronic properties is presented. In addition, the discussion of each material emphasizes key advances and strategies to develop superior H2 sensors. Furthermore, recent key advances in other types of H2 sensors are briefly discussed. Finally, the review concludes with a brief outlook, perspective, and future directions.
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Affiliation(s)
- Won-Tae Koo
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Hee-Jin Cho
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Dong-Ha Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Yoon Hwa Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Hamin Shin
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
| | - Reginald M Penner
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Il-Doo Kim
- Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
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4
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Chan CY, Chang CH, Tuan HY. Colloidal synthesis of porous red phosphorus nanoparticles as a metal-free electrocatalyst for the hydrogen evolution reaction. Chem Commun (Camb) 2020; 56:2937-2940. [PMID: 32040111 DOI: 10.1039/d0cc00543f] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Porous red phosphorus nanoparticles, P-RPNPs, were synthesized via a new colloidal approach and used as metal-free electrocatalysts in the hydrogen evolution reaction (HER). P-RPNPs were highly efficient in acidic media, required an overpotential of only 218 mV to reach 10 mA cm-2, and exhibited superior long-term durability.
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Affiliation(s)
- Cheng-Ying Chan
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, P. R. China.
| | - Chao-Hung Chang
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, P. R. China.
| | - Hsing-Yu Tuan
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan, P. R. China.
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5
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Sharma P, Shin JB, Park BC, Lee JW, Byun SW, Jang NY, Kim YJ, Kim Y, Kim YK, Cho NH. Application of radially grown ZnO nanowires on poly-l-lactide microfibers complexed with a tumor antigen for cancer immunotherapy. NANOSCALE 2019; 11:4591-4600. [PMID: 30809611 DOI: 10.1039/c8nr08704k] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Zinc oxide (ZnO)-based nanocomposites have shown promising potential for various biomedical applications, including vaccine development, owing to their multifunctionality and biocompatibility. Here, we synthesized radially grown ZnO nanowires (NWs) on poly-l-lactic acid (PLLA) microfibers with unique 3-dimensional structure and applied them as therapeutic cancer vaccines. This inorganic-organic hybrid nanocomposite has mild cellular toxicity but efficiently delivers a tumor antigen into dendritic cells, cellular bridges between innate and adaptive immunity, to stimulate them to express inflammatory cytokines and activation surface markers. We also demonstrated that the hybrid nanocomposites successfully induce tumor antigen-specific cellular immunity and significantly inhibit tumor growth in vivo. ZnO NWs on PLLA fibers systemically reduced immune suppressive TReg cells and enhanced the infiltration of T cells into tumor tissues, compared to mice immunized with PLLA fibers coated with the antigen. Our current findings open a new avenue in extending the biomedical application of inorganic metal oxide-inert organic hybrid nanocomposites as a novel vaccine platform.
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Affiliation(s)
- Prashant Sharma
- Department of Microbiology and Immunology, Seoul National University College of Medicine, Seoul 03080, Republic of Korea
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6
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Le Saux G, Bar-Hanin N, Edri A, Hadad U, Porgador A, Schvartzman M. Nanoscale Mechanosensing of Natural Killer Cells is Revealed by Antigen-Functionalized Nanowires. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1805954. [PMID: 30488552 DOI: 10.1002/adma.201805954] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 11/06/2018] [Indexed: 06/09/2023]
Abstract
Cells sense their environment by transducing mechanical stimuli into biochemical signals. Commonly used tools to study cell mechanosensing provide limited spatial and force resolution. Here, a novel nanowire-based platform for monitoring cell forces is reported. Nanowires are functionalized with ligands for cell immunoreceptors, and they are used to explore the mechanosensitivity of natural killer (NK) cells. In particular, it is found that NK cells apply centripetal forces to nanowires, and that the nanowires stimulate cell contraction. Based on the nanowire deformation, it is calculated that cells apply forces of down to 10 pN, which is the smallest value demonstrated so far by microstructured platforms for cell spreading. Furthermore, the roles of: i) nanowire topography and ii) activating ligands in the cell immune function are studied and it is found that only their combination produces enhanced population of activated NK cells. Thus, a mechanosensing mechanism of NK cells is proposed, by which they integrate biochemical and mechanical stimuli into a decision-making machinery analogous to the AND logic gate, whose output is the immune activation. This work reveals unprecedented mechanical aspects of NK cell immune function and introduces an innovative nanomaterial for studying cellular mechanics with unparalleled spatial and mechanical resolution.
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Affiliation(s)
- Guillaume Le Saux
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Netanel Bar-Hanin
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Avishay Edri
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Uzi Hadad
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Angel Porgador
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
| | - Mark Schvartzman
- Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
- Ilse Katz Institute for Nanoscale Science & Technology, Ben-Gurion University of the Negev, Beer Sheva, 84105, Israel
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7
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Cai X, Yuan T, Liu X, Tu G. Self-Assembly of 1-Pyrenemethanol on ZnO Surface toward Combined Cathode Buffer Layers for Inverted Polymer Solar Cells. ACS APPLIED MATERIALS & INTERFACES 2017; 9:36082-36089. [PMID: 28967247 DOI: 10.1021/acsami.7b10399] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Solid alcohol 1-pyrenemethanol (PyM) was first introduced to modify the zinc oxide (ZnO) layer which is used in the inverted polymer solar cells (PSCs) as a cathode buffer layer (CBL). As a low-cost industrial product, the PyM can modify the surface defects and improve the electron mobility of ZnO CBL, which can be attributed to the self-assembly of PyM on the ZnO surface due to the hydrogen bonds and the conjugated structure in PyM. With a blend of PTB7:PC71BM as active layer, the device with ZnO/PyM CBL exhibited a notable power conversion efficiency (PCE) of 8.26%, which is better than that of control devices based on bare ZnO CBL (7.26%). With the addition of PyM, the device based on PTB7-Th:PC71BM showed a higher PCE of 9.10%, an obvious improvement from the 7.79% of control devices. There was no obvious change in device performance with the increase of PyM solution concentration, indicating that the device fabrications are thickness-insensitive. These results could be particularly useful in solution processing of buffer layer materials to high-efficiency organic solar cells.
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Affiliation(s)
- Xiang Cai
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , Wuhan 430074, PR China
| | - Tao Yuan
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , Wuhan 430074, PR China
| | - Xiangfu Liu
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , Wuhan 430074, PR China
| | - Guoli Tu
- Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology , Wuhan 430074, PR China
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8
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Wu X, Xiong S, Mao Z, Hu S, Long X. A Designed ZnO@ZIF-8 Core-Shell Nanorod Film as a Gas Sensor with Excellent Selectivity for H2
over CO. Chemistry 2017; 23:7969-7975. [DOI: 10.1002/chem.201700320] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Xiaonan Wu
- Institute of Nuclear Physics and Chemistry; China Academy of Engineering Physics; Mianyang, Sichuan 621900 P. R. China
| | - Shunshun Xiong
- Institute of Nuclear Physics and Chemistry; China Academy of Engineering Physics; Mianyang, Sichuan 621900 P. R. China
| | - Zhenghao Mao
- Institute of Nuclear Physics and Chemistry; China Academy of Engineering Physics; Mianyang, Sichuan 621900 P. R. China
| | - Sheng Hu
- Institute of Nuclear Physics and Chemistry; China Academy of Engineering Physics; Mianyang, Sichuan 621900 P. R. China
| | - Xinggui Long
- Institute of Nuclear Physics and Chemistry; China Academy of Engineering Physics; Mianyang, Sichuan 621900 P. R. China
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9
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Liu X, Yang J, Zhao W, Wang Y, Li Z, Lin Z. A Simple Route to Reduced Graphene Oxide-Draped Nanocomposites with Markedly Enhanced Visible-Light Photocatalytic Performance. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:4077-4085. [PMID: 27322494 DOI: 10.1002/smll.201601110] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Revised: 05/17/2016] [Indexed: 06/06/2023]
Abstract
Nanocomposites (denoted RGO/ZnONRA) comprising reduced graphene oxide (RGO) draped over the surface of zinc oxide nanorod array (ZnONRA) were produced via a simple low-temperature route, dispensing with the need for hydrothermal growth, electrochemical deposition or other complex treatments. The amount of deposited RGO can be readily tuned by controlling the concentration of graphene oxide (GO). Interestingly, the addition of Sn(2+) not only enables the reduction of GO, but also functions as a bridge that connects the resulting RGO and ZnONRA. Remarkably, the incorporation of RGO improves the visible-light absorption and reduces the bandgap of ZnO, thereby leading to the markedly improved visible-light photocatalytic performance. Moreover, RGO/ZnONRA nanocomposites exhibit a superior stability as a result of the surface protection of ZnONRA by RGO. The mechanism on the improved photocatalytic performance based on the cophotosensitizations under the visible-light irradiation has been proposed. This simple yet effective route to the RGO-decorated semiconductor nanocomposites renders the better visible-light utilization, which may offer great potential for use in photocatalytic degradation of organic pollutants, solar cells, and optoelectronic materials and devices.
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Affiliation(s)
- Xueqin Liu
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, Hubei, 430074, China
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Jianbo Yang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, Hubei, 430074, China
| | - Wen Zhao
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, Hubei, 430074, China
| | - Yang Wang
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, Hubei, 430074, China
| | - Zhen Li
- Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan, Hubei, 430074, China
| | - Zhiqun Lin
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA, 30332, USA
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10
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Liu Y, Feng S, Li Z, Zhang L, Wang G, Chen W, Wang T, Zhong W. Oxygen vacancy-related room temperature ferromagnetism in TiO2 nanohole arrays. RSC Adv 2016. [DOI: 10.1039/c6ra08833c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
Room temperature ferromagnetism was observed in hole-like TiO2 nanostructure arrays prepared by a monolayer colloidal crystal template.
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Affiliation(s)
- Yanping Liu
- Department of Physics and Electronic Engineering
- Taizhou University
- Taizhou
- China
| | - Shangshen Feng
- Department of Physics and Electronic Engineering
- Taizhou University
- Taizhou
- China
| | - Zhigang Li
- Department of Physics and Electronic Engineering
- Taizhou University
- Taizhou
- China
| | - Li Zhang
- Department of Physics and Electronic Engineering
- Taizhou University
- Taizhou
- China
| | - Guping Wang
- Department of Physics and Electronic Engineering
- Taizhou University
- Taizhou
- China
| | - Weiping Chen
- Department of Physics and Electronic Engineering
- Taizhou University
- Taizhou
- China
| | - Tianle Wang
- Department of Physics and Electronic Engineering
- Taizhou University
- Taizhou
- China
| | - Wenwu Zhong
- Department of Physics and Electronic Engineering
- Taizhou University
- Taizhou
- China
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11
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Vedhanayagam M, Mohan R, Nair BU, Sreeram KJ. Nanorod mediated collagen scaffolds as extra cellular matrix mimics. Biomed Mater 2015; 10:065010. [DOI: 10.1088/1748-6041/10/6/065010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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12
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A versatile solution-phase, precursor route to surface-mazelike hierarchical structures. Sci China Chem 2015. [DOI: 10.1007/s11426-014-5298-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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13
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García Núñez C, Sachsenhauser M, Blashcke B, García Marín A, Garrido JA, Pau JL. Effects of hydroxylation and silanization on the surface properties of ZnO nanowires. ACS APPLIED MATERIALS & INTERFACES 2015; 7:5331-5337. [PMID: 25675135 DOI: 10.1021/am508752m] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Silanization is commonly used to form bonds between inorganic materials and biomolecules as a step in the surface preparation of solid-state biosensors. This work investigates the effects of silanization with amino-propyldiethoxymethylsilane on hydroxylated sidewalls of zinc oxide (ZnO) nanowires (NWs). The surface properties and electrical characteristics of NWs are analyzed by different techniques after their hydroxylation and later silanization. Contact angle measurements reveal a stronger hydrophobic behavior after silanization, and X-ray photoelectron spectroscopy (XPS) results show a reduction of the surface dipole induced by the replacement of the hydroxyl group with the amine terminal group. The lower work function obtained after silanization in contact potential measurements corroborates the attenuation of the surface dipole observed in XPS. Furthermore, the surface band bending of NWs is determined from surface photovoltage measurements upon irradiation with UV light, yielding a 0.5 eV energy in hydroxylated NWs, and 0.18 eV, after silanization. From those results, a reduction in the surface state density of 3.1 × 10(11) cm(-2) is estimated after silanization. The current-voltage (I-V) characteristics measured in a silanized single NW device show a reduction of the resistance, due to the enhancement of the conductive volume inside the NW, which also improves the linearity of the I-V characteristic.
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Affiliation(s)
- C García Núñez
- Grupo de Electrónica y Semiconductores, Departamento Física Aplicada, Universidad Autónoma de Madrid , C/Francisco Tomás y Valiente 7, 28049 Madrid, España
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14
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Wang L, Li R, Feng L, Liu J, Gao X, Wang W. Study on the interface electronic states of chemically modified ZnO nanowires. RSC Adv 2015. [DOI: 10.1039/c5ra20822j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
In this work, ZnO nanowires were modified with three mercaptans.
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Affiliation(s)
- Lei Wang
- Department of Chemistry
- Liaocheng University
- Liaocheng 252000
- China
| | - Rui Li
- Department of Chemistry
- Liaocheng University
- Liaocheng 252000
- China
| | - Lu Feng
- Department of Chemistry
- Liaocheng University
- Liaocheng 252000
- China
| | - Jifeng Liu
- Key Laboratory of Food Nutrition and Safety
- Ministry of Education of China
- Tianjin University of Science and Technology
- Tianjin 300457
- China
| | - Xuexi Gao
- Department of Physics
- Liaocheng University
- Liaocheng 252000
- China
| | - Wenjun Wang
- Department of Physics
- Liaocheng University
- Liaocheng 252000
- China
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15
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Growth of Ultra-Long ZnO Microtubes Using a Modified Vapor-Solid Setup. MICROMACHINES 2014. [DOI: 10.3390/mi5041069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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16
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Costenaro D, Carniato F, Gatti G, Marchese L, Bisio C. Organo-modified ZnO nanoparticles: tuning of the optical properties for PLED device fabrication. NEW J CHEM 2014. [DOI: 10.1039/c4nj01331j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Lu J, Liu H, Zheng M, Zhang H, Lim SX, Tok ES, Sow CH. Laser modified ZnO/CdSSe core-shell nanowire arrays for Micro-Steganography and improved photoconduction. Sci Rep 2014; 4:6350. [PMID: 25213321 PMCID: PMC4161969 DOI: 10.1038/srep06350] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2014] [Accepted: 08/22/2014] [Indexed: 11/09/2022] Open
Abstract
Arrays of ZnO/CdSSe core/shell nanowires with shells of tunable band gaps represent a class of interesting hybrid nanomaterials with unique optical and photoelectrical properties due to their type II heterojunctions and chemical compositions. In this work, we demonstrate that direct focused laser beam irradiation is able to achieve localized modification of the hybrid structure and chemical composition of the nanowire arrays. As a result, the photoresponsivity of the laser modified hybrid is improved by a factor of ~3. A 3D photodetector with improved performance is demonstrated using laser modified nanowire arrays overlaid with monolayer graphene as the top electrode. Finally, by controlling the power of the scanning focused laser beam, micropatterns with different fluorescence emissions are created on a substrate covered with nanowire arrays. Such a pattern is not apparent when imaged under normal optical microscopy but the pattern becomes readily revealed under fluorescence microscopy i.e. a form of Micro-Steganography is achieved.
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Affiliation(s)
- Junpeng Lu
- Department of Physics, 2 Science Drive 3, National University of Singapore, 117542, Singapore
| | - Hongwei Liu
- Institute of Materials Research and Engineering, A*STAR (Agency for Science, Technology and Research), 3 Research Link, 117602, Singapore
| | - Minrui Zheng
- Department of Physics, 2 Science Drive 3, National University of Singapore, 117542, Singapore
| | - Hongji Zhang
- Department of Physics, 2 Science Drive 3, National University of Singapore, 117542, Singapore
| | - Sharon Xiaodai Lim
- Department of Physics, 2 Science Drive 3, National University of Singapore, 117542, Singapore
| | - Eng Soon Tok
- Department of Physics, 2 Science Drive 3, National University of Singapore, 117542, Singapore
| | - Chorng Haur Sow
- Department of Physics, 2 Science Drive 3, National University of Singapore, 117542, Singapore
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18
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Singh SB, Wang YF, Shao YC, Lai HY, Hsieh SH, Limaye MV, Chuang CH, Hsueh HC, Wang H, Chiou JW, Tsai HM, Pao CW, Chen CH, Lin HJ, Lee JF, Wu CT, Wu JJ, Pong WF, Ohigashi T, Kosugi N, Wang J, Zhou J, Regier T, Sham TK. Observation of the origin of d0 magnetism in ZnO nanostructures using X-ray-based microscopic and spectroscopic techniques. NANOSCALE 2014; 6:9166-9176. [PMID: 24978624 DOI: 10.1039/c4nr01961j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Efforts have been made to elucidate the origin of d(0) magnetism in ZnO nanocactuses (NCs) and nanowires (NWs) using X-ray-based microscopic and spectroscopic techniques. The photoluminescence and O K-edge and Zn L3,2-edge X-ray-excited optical luminescence spectra showed that ZnO NCs contain more defects than NWs do and that in ZnO NCs, more defects are present at the O sites than at the Zn sites. Specifically, the results of O K-edge scanning transmission X-ray microscopy (STXM) and the corresponding X-ray-absorption near-edge structure (XANES) spectroscopy demonstrated that the impurity (non-stoichiometric) region in ZnO NCs contains a greater defect population than the thick region. The intensity of O K-edge STXM-XANES in the impurity region is more predominant in ZnO NCs than in NWs. The increase in the unoccupied (occupied) density of states at/above (at/below) the conduction-band minimum (valence-band maximum) or the Fermi level is related to the population of defects at the O sites, as revealed by comparing the ZnO NCs to the NWs. The results of O K-edge and Zn L3,2-edge X-ray magnetic circular dichroism demonstrated that the origin of magnetization is attributable to the O 2p orbitals rather than the Zn d orbitals. Further, the local density approximation (LDA) + U verified that vacancies in the form of dangling or unpaired 2p states (due to Zn vacancies) induced a significant local spin moment in the nearest-neighboring O atoms to the defect center, which was determined from the uneven local spin density by analyzing the partial density of states of O 2p in ZnO.
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Affiliation(s)
- Shashi B Singh
- Department of Physics, Tamkang University, Tamsui 251, Taiwan.
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19
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Wang L, Feng L, Liu J. Study the effect of functional molecule types on the surface properties of ZnO nanorods. RSC Adv 2014. [DOI: 10.1039/c4ra12889c] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
To better understand the effect of functional molecule types to the surface properties of ZnO nanorods, three organic molecules – ethylenediamine, sodium citrate and butanethiol were used for the surface modification of ZnO nanorods.
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Affiliation(s)
- Lei Wang
- Department of Chemistry
- Liaocheng University
- Liaocheng, China
| | - Lu Feng
- Department of Chemistry
- Liaocheng University
- Liaocheng, China
| | - Jifeng Liu
- Department of Chemistry
- Liaocheng University
- Liaocheng, China
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20
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Yu C, Yang K, Xie Y, Fan Q, Yu JC, Shu Q, Wang C. Novel hollow Pt-ZnO nanocomposite microspheres with hierarchical structure and enhanced photocatalytic activity and stability. NANOSCALE 2013; 5:2142-2151. [PMID: 23385557 DOI: 10.1039/c2nr33595f] [Citation(s) in RCA: 130] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Noble metal/semiconductor nanocomposites play an important role in high efficient photocatalysis. Herein, we demonstrate a facile strategy for fabrication of hollow Pt-ZnO nanocomposite microspheres with hierarchical structure under mild solvothermal conditions using Zn (CH(3)COO)(2)·2H(2)O and HPtCl(4) as the precursors, and polyethylene glycol-6000 (PEG-6000) and ethylene glycol as the reducing agent and solvent, respectively. The as-synthesized ZnO and Pt-ZnO composite nanocrystals were well characterized by powder X-ray diffraction (XRD), nitrogen-physical adsorption, scanning electron microscopy (SEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflectance spectra (DRS), and photoluminescence (PL) emission spectroscopy. It was found that Pt content greatly influences the morphology of Pt-ZnO composite nanocrystals. Suitable concentration of HPtCl(4) in the reaction solution system can produce well hierarchically hollow Pt-ZnO nanocomposite microspheres, which are composed of an assembly of fine Pt-ZnO nanocrystals. Photocatalytic tests of the Pt-ZnO microspheres for the degradation of the dye acid orange II revealed extremely high photocatalytic activity and stability compared with those of pure ZnO and corresponding Pt deposited ZnO. The remarkable photocatalytic performance of hollow Pt-ZnO microspheres mainly originated from their unique nanostructures and the low recombination rate of the e(-)/h(+) pairs by the platinum nanoparticles embedded in ZnO nanocrystals.
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Affiliation(s)
- Changlin Yu
- School of Metallurgy and Chemical Engineering, Jiangxi University of Science and Technology, 86 Hongqi Road, Ganzhou 341000, Jiangxi, PR China.
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21
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Mohmood I, Lopes CB, Lopes I, Ahmad I, Duarte AC, Pereira E. Nanoscale materials and their use in water contaminants removal-a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2013; 20:1239-60. [PMID: 23292223 DOI: 10.1007/s11356-012-1415-x] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Accepted: 12/09/2012] [Indexed: 05/26/2023]
Abstract
Water scarcity is being recognized as a present and future threat to human activity and as a consequence water purification technologies are gaining major attention worldwide. Nanotechnology has many successful applications in different fields but recently its application for water and wastewater treatment has emerged as a fast-developing, promising area. This review highlights the recent advances on the development of nanoscale materials and processes for treatment of surface water, groundwater and industrial wastewater that are contaminated by toxic metals, organic and inorganic compounds, bacteria and viruses. In addition, the toxic potential of engineered nanomaterials for human health and the environment will also be discussed.
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Affiliation(s)
- Iram Mohmood
- Department of Chemistry and CESAM, University of Aveiro, 3810-193, Aveiro, Portugal.
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22
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Qi K, Yang J, Fu J, Wang G, Zhu L, Liu G, Zheng W. Morphology-controllable ZnO rings: Ionic liquid-assisted hydrothermal synthesis, growth mechanism and photoluminescence properties. CrystEngComm 2013. [DOI: 10.1039/c3ce27007f] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Bui CT, Xie R, Zheng M, Zhang Q, Sow CH, Li B, Thong JTL. Diameter-dependent thermal transport in individual ZnO nanowires and its correlation with surface coating and defects. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2012; 8:738-745. [PMID: 22162412 DOI: 10.1002/smll.201102046] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Indexed: 05/31/2023]
Abstract
A systematic study of the thermal transport properties of individual single-crystal zinc oxide (ZnO) nanowires (NWs) with diameters in the range of ∼50-210 nm is presented. The thermal conductivity of the NWs is found to be dramatically reduced by at least an order of magnitude compared to bulk values, due to enhanced phonon-boundary scattering with a reduction in sample size. While the conventional phonon transport model can qualitatively explain the temperature dependence, it fails to account for the diameter dependence. An empirical relationship for assessing diameter-dependent thermal properties is observed, which shows an approximately linear dependence of the thermal conductivity on the cross-sectional area of the NWs in the measured diameter range. Furthermore, it is found that an amorphous-carbon layer coating on the NWs does not perturb the thermal properties of the NW cores, whereas 30 keV Ga(+) ion irradiation at low dose (∼4 × 10(14) cm(-2)) leads to a remarkable reduction of the thermal conductivity of the ZnO NWs.
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Affiliation(s)
- Cong Tinh Bui
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, 117456, Republic of Singapore
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Zhang Z, Gao H, Cai W, Liu C, Guo Y, Gao PX. In situ TPR removal: a generic method for fabricating tubular array devices with mechanical and structural soundness, and functional robustness on various substrates. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm34606k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Zhang S, Pelligra CI, Keskar G, Majewski PW, Ren F, Pfefferle LD, Osuji CO. Liquid crystalline order and magnetocrystalline anisotropy in magnetically doped semiconducting ZnO nanowires. ACS NANO 2011; 5:8357-64. [PMID: 21905709 DOI: 10.1021/nn203070d] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
Controlled alignment of nanomaterials over large length scales (>1 cm) presents a challenge in the utilization of low-cost solution processing techniques in emerging nanotechnologies. Here, we report on the lyotropic liquid crystalline behavior of transition-metal-doped zinc oxide nanowires and their facile alignment over large length scales under external fields. High aspect ratio Co- and Mn-doped ZnO nanowires were prepared by solvothermal synthesis with uniform incorporation of dopant ions into the ZnO wurtzite crystal lattice. The resulting nanowires exhibited characteristic paramagnetic behavior. Suspensions of surface-functionalized doped nanowires spontaneously formed stable homogeneous nematic liquid crystalline phases in organic solvent above a critical concentration. Large-area uniaxially aligned thin films of doped nanowires were obtained from the lyotropic phase by applying mechanical shear and, in the case of Co-doped nanowires, magnetic fields. Application of shear produced thin films in which the nanowire long axes were aligned parallel to the flow direction. Conversely, the nanowires were found to orient perpendicular to the direction of the applied magnetic fields. This indicates that the doped ZnO possesses magnetocrystalline anisotropy sufficient in magnitude to overcome the parallel alignment which would be predicted based solely on the anisotropic demagnetizing field associated with the high aspect ratio of the nanowires. We use a combination of magnetic property measurements and basic magnetostatics to provide a lower-bound estimate for the magnetocrystalline anisotropy.
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Affiliation(s)
- Shanju Zhang
- Department of Chemical and Environmental Engineering, Yale University, New Haven, Connecticut 06511, United States
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Chen JK, Qui JQ. Nanowires of 3-D cross-linked gold nanoparticle assemblies behave as thermosensors on silicon substrates. Colloid Polym Sci 2011. [DOI: 10.1007/s00396-011-2503-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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27
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Gao X, Li X, Gao W, Qiu J, Gan X, Wang C, Leng X. Nanocrystalline/nanoporous ZnO spheres, hexapods and disks transformed from zinc fluorohydroxide, their self-assembly and patterned growth. CrystEngComm 2011. [DOI: 10.1039/c1ce05125c] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Huang SP, Xu H, Bello I, Zhang RQ. Surface Passivation-Induced Strong Ferromagnetism of Zinc Oxide Nanowires. Chemistry 2010; 16:13072-6. [DOI: 10.1002/chem.201001167] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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29
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SelegArd L, Khranovskyy V, Söderlind F, Vahlberg C, Ahrén M, Käll PO, Yakimova R, Uvdal K. Biotinylation of ZnO nanoparticles and thin films: a two-step surface functionalization study. ACS APPLIED MATERIALS & INTERFACES 2010; 2:2128-2135. [PMID: 20608650 DOI: 10.1021/am100374z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
This study reports ZnO nanoparticles and thin film surface modification using a two-step functionalization strategy. A small silane molecule was used to build up a stabilizing layer and for conjugation of biotin (vitamin B7), as a specific tag. Biotin was chosen because it is a well-studied bioactive molecule with high affinity for avidin. ZnO nanoparticles were synthesized by electrochemical deposition under oxidizing condition, and ZnO films were prepared by plasma-enhanced metal-organic chemical vapor deposition. Both ZnO nanoparticles and ZnO thin films were surface modified by forming a (3-mercaptopropyl)trimethoxysilane (MPTS) layer followed by attachment of a biotin derivate. Iodoacetyl-PEG2-biotin molecule was coupled to the thiol unit in MPTS through a substitution reaction. Powder X-ray diffraction, transmission electron microscopy, X-ray photoemission electron microscopy, atomic force microscopy, X-ray photoelectron spectroscopy, and near-edge X-ray absorption fine structure spectroscopy were used to investigate the as-synthesized and functionalized ZnO materials. The measurements showed highly crystalline materials in both cases with a ZnO nanoparticle diameter of about 5 nm and a grain size of about 45 nm for the as-grown ZnO thin films. The surface modification process resulted in coupling of silanes and biotin to both the ZnO nanoparticles and ZnO thin films. The two-step functionalization strategy has a high potential for specific targeting in bioimaging probes and for recognition studies in biosensing applications.
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Affiliation(s)
- Linnéa SelegArd
- Divisions of Molecular Surface Physics and Nanoscience, Semiconductor Materials, and Chemistry, Department of Physics, Chemistry and Biology (IFM), Linkoping University, SE-58183 Linkoping, Sweden
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