1
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Khaliq N, Ali G, Rasheed MA, Khan M, Xie Y, Schmuki P, Cho SO, Karim S. Multifunctional tunable Cu 2O and CuInS 2 quantum dots on TiO 2 nanotubes for efficient chemical oxidation of cholesterol and ibuprofen. NANOSCALE 2024; 16:12207-12227. [PMID: 38845383 DOI: 10.1039/d4nr00422a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/28/2024]
Abstract
In this study, a CuInS2/Cu2O/TiO2 nanotube (TNT) heterojunction-based hybrid material is reported for the selective detection of cholesterol and ibuprofen. Anodic TNTs were co-decorated with Cu2O and CuInS2 quantum dots (QDs) using a modified chemical bath deposition (CBD) method. QDs help trigger the chemical oxidation of cholesterol by cathodically generating hydroxyl radicals (˙OH). The small size of QDs can be used to tune the energy levels of electrode materials to the effective redox potential of redox species, resulting in highly improved sensing characteristics. Under optimal conditions, CuInS2/Cu2O/TNTs show the highest sensitivity (∼12 530 μA mM-1 cm-2, i.e. up to 11-fold increase compared to pristine TNTs) for cholesterol detection with a low detection limit (0.013 μM) and a fast response time (1.3 s). The proposed biosensor was successfully employed for the detection of cholesterol in real blood samples. In addition, fast (4 s) and reliable detection of ibuprofen (with a sensitivity of ∼1293 μA mM-1 cm-2) as a water contaminant was achieved using CuInS2/Cu2O/TNTs. The long-term stability and favourable reproducibility of CuInS2/Cu2O/TNTs illustrate a unique concept for the rational design of a stable and high-performance multi-purpose electrochemical sensor.
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Affiliation(s)
- Nilem Khaliq
- Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad 45650, Pakistan.
- Department of Physics, Women University Swabi, Swabi, Khyber Pakhtunkhwa, Pakistan
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany.
| | - Ghafar Ali
- Nanomaterials Research Group (NRG), Physics Division, PINSTECH, Islamabad 44000, Pakistan.
| | - Muhammad Asim Rasheed
- Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad 45650, Pakistan.
| | - Maaz Khan
- Nanomaterials Research Group (NRG), Physics Division, PINSTECH, Islamabad 44000, Pakistan.
| | - Yi Xie
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, No. 122, Luoshi Road, Wuhan 430070, China
| | - Patrik Schmuki
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany.
| | - Sung Oh Cho
- Department of Nuclear and Quantum Engineering (NQe), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Shafqat Karim
- Nanomaterials Research Group (NRG), Physics Division, PINSTECH, Islamabad 44000, Pakistan.
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2
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Kumar P, Rajan R, Upadhyaya K, Behl G, Xiang XX, Huo P, Liu B. Metal oxide nanomaterials based electrochemical and optical biosensors for biomedical applications: Recent advances and future prospectives. ENVIRONMENTAL RESEARCH 2024; 247:118002. [PMID: 38151147 DOI: 10.1016/j.envres.2023.118002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 12/06/2023] [Accepted: 12/19/2023] [Indexed: 12/29/2023]
Abstract
The amalgamation of nanostructures with modern electrochemical and optical techniques gave rise to interesting devices, so-called biosensors. A biosensor is an analytical tool that incorporates various biomolecules with an appropriate physicochemical transducer. Over the past few years, metal oxide nanomaterials (MONMs) have significantly stimulated biosensing research due to their desired functionalities, versatile chemical stability, and low cost along with their unique optical, catalytic, electrical, and adsorption properties that provide an attractive platform for linking the biomolecules, for example, antibodies, nucleic acids, enzymes, and receptor proteins as sensing elements with the transducer for the detection of signals or signal amplifications. The signals to be measured are in direct proportionate to the concentration of the bioanalyte. Because of their simplicity, cost-effectiveness, portability, quick analysis, higher sensitivity, and selectivity against a broad range of biosamples, MONMs-based electrochemical and optical biosensing platforms are exhaustively explored as powerful early-diagnosis tools for point of care applications. Herein, we made a bibliometric analysis of past twenty years (2004-2023) on the application of MONMs as electrochemical and optical biosensing units using Web of Science database and the results of which clearly reveal the increasing number of publications since 2004. Geographical area distribution analysis of these publications shows that China tops the list followed by the United States of America and India. In this review, we first describe the electrochemical and optical properties of MONMs that are crucial for the creation of extremely stable, specific, and sensitive sensors with desirable characteristics. Then, the biomedical applications of MONMs-based bare and hybrid electrochemical and optical biosensing frameworks are highlighted in the light of recent literature. Finally, current limitations and future challenges in the field of biosensing technology are addressed.
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Affiliation(s)
- Parveen Kumar
- Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Xincun West Road 266, Zibo, 255000, China; School of Pharmacy, University College Cork, T12 K8AF, Cork, Ireland
| | - Ramachandran Rajan
- Translational Medical Center, Zibo Central Hospital, Zibo, 255036, Shandong, China
| | - Kapil Upadhyaya
- Chemical Physiology & Biochemistry Department, Oregon Health & Science University, Portland, OR, 97239, USA
| | - Gautam Behl
- Eirgen Pharma Ltd., Westside Business Park, Waterford, Ireland
| | - Xin-Xin Xiang
- Translational Medical Center, Zibo Central Hospital, Zibo, 255036, Shandong, China
| | - Peipei Huo
- Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Xincun West Road 266, Zibo, 255000, China.
| | - Bo Liu
- Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Xincun West Road 266, Zibo, 255000, China.
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3
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Wu X, Wang C, Hao P, He F, Yao Z, Wei R, Zhang X. Mesoscopic Model for Reversible Adsorption Stage of Albumin and Fibrinogen on TiO 2 Surface. J Phys Chem B 2024; 128:1900-1914. [PMID: 38289261 DOI: 10.1021/acs.jpcb.3c07372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2024]
Abstract
The competitive behavior of proteins in the reversible adsorption stage plays a crucial role in determining the composition of the protein layer and the subsequent biological responses to the biomaterial. However, such competitive adsorption is a mesoscopic process at physiological protein concentration, and neither a macroscopic experiment nor microscopic MD (molecular dynamics) simulation is suitable to clarify it. Here, we proposed a mesoscopic DPD (dissipative particle dynamics) model to illustrate the competitive process of albumin and fibrinogen on TiO2 surface with its parameters deduced from our previous MD simulation, and proved the model well retained the diffusion and adsorption properties of proteins in the competitive adsorption on the plane surface. We then applied the model to the competitive adsorption on the surfaces with different nanostructures and observed that when the nanostructure size is much larger than that of protein, the increase in surface area is the main influencing factor; when the nanostructure size is close to that of protein, the coordination between the nanostructure and the size and shape of protein significantly affects the competitive adsorption process. The model has revealed many mechanical phenomena observed in previous experimental studies and has the potential to contribute to the development of high-performance biomaterials.
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Affiliation(s)
- Xiao Wu
- Engineering Technology Research Center of Henan Province for MEMS Manufacturing and Applications, School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
- Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
| | - Chenyang Wang
- Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
| | - Pengfei Hao
- Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
- AVIC Aerodynamics Research Institute Joint Research Center for Advanced Materials and Anti-Icing School of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
| | - Feng He
- Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
| | - Zhaohui Yao
- University of Chinese Academy of Sciences, Beijing 101408, P. C. China
| | - Ronghan Wei
- Engineering Technology Research Center of Henan Province for MEMS Manufacturing and Applications, School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Xiwen Zhang
- Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China
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4
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Lai YH, Lee YC, Li HY, Hsieh WH. 4-(Triethoxysilyl)butanoic acid as a self-assembled monolayer for surface modification of titanium dioxide. Analyst 2024; 149:1202-1211. [PMID: 38214351 DOI: 10.1039/d3an01795h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
In this study, the carboxy silane 4-(triethoxysilyl)butanoic acid (TESBA) was used to modify titanium dioxide (TiO2) to create a self-assembled monolayer (SAM) and then directionally immobilize a capture antibody using protein A. We selected the amino silane (3-aminopropyl)triethoxysilane (APTES) to perform a comparative analysis with TESBA, and employed glutaraldehyde (GA) as the control. The modification and detection effects and the limit of detection (LOD) were evaluated by detecting human immunoglobulin G (IgG). The average normalized sensitivity of the dual-grating coupler waveguide biosensor was 49.63 ± 0.27 RIU-1 and the optimum resolution was 1.30 × 10-6 RIU. When the SAM was prepared using TESBA and APTES followed by GA, the LOD was 4.59 × 10-7 g mL-1 and 5.29 × 10-7 g mL-1, respectively. We analyzed the modification and detection effects by the t-test and concluded that the differences in the modification effects using TESBA and APTES followed by GA were significant and the differences in the detection effects using TESBA and APTES followed by GA were insignificant. The use of TESBA as the SAM led to the modification effect being superior to that obtained using APTES followed by GA. The detection effect using TESBA was as outstanding as that using APTES followed by GA. Our findings demonstrate the feasibility and effectiveness of using TESBA as the SAM to carboxylate the surface of TiO2, thereby enabling immobilization of biomolecules for human IgG detection.
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Affiliation(s)
- Yu-Hsing Lai
- Department of Mechanical Engineering, National Chung Cheng University, Minhsiung, Chiayi, Taiwan.
| | - Yan-Chang Lee
- Research Center for Precision Molding, National Chung Cheng University, Minhsiung, Chiayi, Taiwan
| | - Hsun-Yuan Li
- Research Center for Precision Molding, National Chung Cheng University, Minhsiung, Chiayi, Taiwan
| | - Wen-Hsin Hsieh
- Department of Mechanical Engineering, National Chung Cheng University, Minhsiung, Chiayi, Taiwan.
- Center for Nano Bio-detection, National Chung Cheng University, Minhsiung, Chiayi, Taiwan
- Advanced Institute of Manufacturing with High-Tech Innovations, National Chung Cheng University, Minhsiung, Chiayi, Taiwan
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5
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Gong C, Yang X, Tang SJ, Zhang QQ, Wang Y, Liu YL, Chen YC, Peng GD, Fan X, Xiao YF, Rao YJ, Gong Y. Submonolayer biolasers for ultrasensitive biomarker detection. LIGHT, SCIENCE & APPLICATIONS 2023; 12:292. [PMID: 38052775 DOI: 10.1038/s41377-023-01335-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 10/18/2023] [Accepted: 11/12/2023] [Indexed: 12/07/2023]
Abstract
Biomarker detection is key to identifying health risks. However, designing sensitive and single-use biosensors for early diagnosis remains a major challenge. Here, we report submonolayer lasers on optical fibers as ultrasensitive and disposable biosensors. Telecom optical fibers serve as distributed optical microcavities with high Q-factor, great repeatability, and ultralow cost, which enables whispering-gallery laser emission to detect biomarkers. It is found that the sensing performance strongly depends on the number of gain molecules. The submonolayer lasers obtained a six-order-of-magnitude improvement in the lower limit of detection (LOD) when compared to saturated monolayer lasers. We further achieve an ultrasensitive immunoassay for a Parkinson's disease biomarker, alpha-synuclein (α-syn), with a lower LOD of 0.32 pM in serum, which is three orders of magnitude lower than the α-syn concentration in the serum of Parkinson's disease patients. Our demonstration of submonolayer biolaser offers great potentials in high-throughput clinical diagnosis with ultimate sensitivity.
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Affiliation(s)
- Chaoyang Gong
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
- Key Laboratory of Optoelectronic Technology and Systems (Ministry of Education of China), School of Optoelectronic Engineering, Chongqing University, Chongqing, 400044, China
| | - Xi Yang
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Centre for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Shui-Jing Tang
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Centre for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China
| | - Qian-Qian Zhang
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
| | - Yanqiong Wang
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
| | - Yi-Ling Liu
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China
| | - Yu-Cheng Chen
- School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore
| | - Gang-Ding Peng
- School of Electrical Engineering and Telecommunications, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Xudong Fan
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, 48109, USA
| | - Yun-Feng Xiao
- State Key Laboratory for Mesoscopic Physics and Frontiers Science Centre for Nano-optoelectronics, School of Physics, Peking University, Beijing, 100871, China.
| | - Yun-Jiang Rao
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China.
- Research Centre for Optical Fiber Sensing, Zhejiang Laboratory, Hangzhou, Zhejiang, 310000, China.
| | - Yuan Gong
- Key Laboratory of Optical Fiber Sensing and Communications (Ministry of Education of China), School of Information and Communication Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 611731, China.
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6
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Photocatalytic Evaluation of TiOx Films Produced by Cathodic Arc-PVD with Silver Addition by UVC Photo-Reduction Method. INORGANICS 2022. [DOI: 10.3390/inorganics10100148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A titanium (Ti) commercial cathode material and high purity Ar and O2 were used in the cathodic arc physical vapor deposition (arc-PVD) process. The TiOx coating was deposited on the three sets of Raschig rings using decreasing ratios of Ar/O2:440/60, 400/100 and 300/100. The cross sections of the TiOx PVD coating were analyzed using field emission scanning electron microscopy (FE-SEM), X-ray energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). A homogeneous layer of Ti with small O content was observed, and the data suggest that a thin TiOx oxide film was deposited. For this reason, a thermal treatment was applied to the coating to oxidize it and form the rutile phase of TiO2 in the coating, which was demonstrated by grazing incidence XRD. In addition, the TiOx coatings absorb radiation, which was observed by diffuse reflectance band gap energy measurement. Silver (Ag) was added by the photo-reduction method, using UVC light to activate the TiO2 coating, and the band gap energy was analyzed by diffuse reflectance. The photocatalytic activities of the films were evaluated by degradation of the model dye rhodamine B and in the removal of fecal coliforms using two matrices, water from a secondary treatment effluent, and synthetic water.
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7
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Noviana E, Siswanto S, Budi Hastuti AAM. Advances in Nanomaterial-Based Biosensors for Determination of Glycated Hemoglobin. Curr Top Med Chem 2022; 22:CTMC-EPUB-126335. [PMID: 36111762 DOI: 10.2174/1568026622666220915114646] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/02/2022] [Accepted: 08/01/2022] [Indexed: 11/22/2022]
Abstract
Diabetes is a major public health burden whose prevalence has been steadily increasing over the past decades. Glycated hemoglobin (HbA1c) is currently the gold standard for diagnostics and monitoring glycemic control in diabetes patients. HbA1c biosensors are often considered to be cost-effective alternatives for smaller testing laboratories or clinics unable to access other reference methods. Many of these sensors deploy nanomaterials as recognition elements, detection labels, and/or transducers for achieving sensitive and selective detection of HbA1c. Nanomaterials have emerged as important sensor components due to their excellent optical and electrical properties, tunable morphologies, and easy integration into multiple sensing platforms. In this review, we discuss the advantages of using nanomaterials to construct HbA1c sensors and various sensing strategies for HbA1c measurements. Key gaps between the current technologies with what is needed moving forward are also summarized.
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Affiliation(s)
- Eka Noviana
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada, Indonesia
- Research Center for Drug Targeting and Personalized Medicine, Faculty of Pharmacy, Universitas Gadjah Mada, Indonesia
| | - Soni Siswanto
- Research Center for Drug Targeting and Personalized Medicine, Faculty of Pharmacy, Universitas Gadjah Mada, Indonesia
- Department of Pharmacology and Clinical Pharmacy, Faculty of Pharmacy, Universitas Gadjah Mada, Indonesia
| | - Agustina Ari Murti Budi Hastuti
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Universitas Gadjah Mada, Indonesia
- Center of Excellence Institute for Halal Industry and Systems (PUI-PT IHIS), Universitas Gadjah Mada, Indonesia
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8
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Zhou L, Wang L, Ma N, Wan Y, Qian W. Real-time monitoring of interactions between dietary fibers and lipid layer and their impact on the lipolysis process. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2021.107445] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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9
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Chen Y, Li W, Li J, Zhuo S, Jiao S, Wang S, Sun J, Li Q, Zheng T. Stable three-dimensional porous silicon-carbon-gold composite film for enrichment and directly electrochemical detection of bisphenol A. Microchem J 2021. [DOI: 10.1016/j.microc.2021.106881] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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10
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Lu X, Xu J, Wang Y, Xue Y, Li J, Hu X, Yang Z. Nitrogen‐doped TiO
2
Nanocrystals for Highly Sensitive Electrochemical Immunoassay of Carcinoembryonic Antigen. ELECTROANAL 2021. [DOI: 10.1002/elan.202100216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xin Lu
- College of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 PR China
| | - Jia Xu
- College of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 PR China
| | - Yulin Wang
- College of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 PR China
| | - Yadong Xue
- Central Laboratory, Affiliated Jinhua Hospital Zhejiang University School of Medicine Jinhua 321000 China
| | - Juan Li
- College of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 PR China
| | - Xiaoya Hu
- College of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 PR China
| | - Zhanjun Yang
- College of Chemistry and Chemical Engineering Yangzhou University Yangzhou 225002 PR China
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11
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Zhou L, Wang L, Ma N, Wu F, Wan Y, Zhang Y, Qian W. Construction of lipid layer and monitoring its digestion by optical interferometry. Food Chem 2021; 366:130553. [PMID: 34284194 DOI: 10.1016/j.foodchem.2021.130553] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2021] [Revised: 06/30/2021] [Accepted: 07/05/2021] [Indexed: 02/07/2023]
Abstract
A method for real-time monitoring of lipid digestion based on photonic crystals formed from silica was developed. As an effective "net", the highly ordered silica colloidal crystal (SCC) film provides structural support for lipid payload. This method based on optical interferometric film kinetics was used to record the whole kinetics progress of olive oil hydrolysis by lipase in real time and calculate the kinetic Michaelis constant. The kinetic parameters were compared with the results determined by the titration method. The effects of bile salt content on lipase and olive oil layer were studied. This method provides a potential evaluation system for real-time digestion and degradation of edible oil in the food field. It also provides a basis for further real-time evaluation of lipid bioavailability in food systems by real-time recording the release and degradation of lipids in the food nano-matrix.
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Affiliation(s)
- Lele Zhou
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Lu Wang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Ning Ma
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Feng Wu
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Yizhen Wan
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Yifan Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Weiping Qian
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
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Ravan BA, Saadati AA, Cheraghi A. Effect of the Length of TiO 2 Nanotube Arrays on Responsivity of Photoelectrochemical-Based Ultraviolet Photodetectors. INTERNATIONAL JOURNAL OF NANOSCIENCE 2021. [DOI: 10.1142/s0219581x21500241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
In this study, one-dimensional titanium dioxide (TiO[Formula: see text] nanotube arrays (NTAs) with different tube lengths are synthesized via anodic oxidation of Ti foils and their ultraviolet (UV) light detection properties are investigated to determine their optimum growth conditions. A TiO2 nanotube ultraviolet photodetector based on photoelectrochemical cell is fabricated using the optimum TiO2 nanotubes and its characteristics in the ultraviolet region are determined. The photodetector is examined under a UV illumination intensity of 10[Formula: see text]mW/cm2and at a wavelength of 368[Formula: see text]nm. Its responsivity is measured to be about 96[Formula: see text][Formula: see text]A/cm2 and its response time is less than 0.2[Formula: see text]s under an applied bias of 0.5[Formula: see text]V.
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Affiliation(s)
- Bahram Abedi Ravan
- Department of Basic Sciences, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
| | - Ali Akbar Saadati
- Department of Basic Sciences, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
| | - Akbar Cheraghi
- Department of Basic Sciences, Shahid Sattari Aeronautical University of Science and Technology, Tehran, Iran
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13
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Sedki M, Shen Y, Mulchandani A. Nano-FET-enabled biosensors: Materials perspective and recent advances in North America. Biosens Bioelectron 2021; 176:112941. [DOI: 10.1016/j.bios.2020.112941] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 12/24/2020] [Accepted: 12/26/2020] [Indexed: 02/06/2023]
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14
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Moretta R, De Stefano L, Terracciano M, Rea I. Porous Silicon Optical Devices: Recent Advances in Biosensing Applications. SENSORS (BASEL, SWITZERLAND) 2021; 21:1336. [PMID: 33668616 PMCID: PMC7917735 DOI: 10.3390/s21041336] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/25/2021] [Accepted: 02/05/2021] [Indexed: 02/07/2023]
Abstract
This review summarizes the leading advancements in porous silicon (PSi) optical-biosensors, achieved over the past five years. The cost-effective fabrication process, the high internal surface area, the tunable pore size, and the photonic properties made the PSi an appealing transducing substrate for biosensing purposes, with applications in different research fields. Different optical PSi biosensors are reviewed and classified into four classes, based on the different biorecognition elements immobilized on the surface of the transducing material. The PL signal modulation and the effective refractive index changes of the porous matrix are the main optical transduction mechanisms discussed herein. The approaches that are commonly employed to chemically stabilize and functionalize the PSi surface are described.
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Affiliation(s)
- Rosalba Moretta
- National Research Council, Institute of Applied Sciences and Intelligent Systems, Unit of Naples, 80131 Naples, Italy; (R.M.); (L.D.S.); (I.R.)
| | - Luca De Stefano
- National Research Council, Institute of Applied Sciences and Intelligent Systems, Unit of Naples, 80131 Naples, Italy; (R.M.); (L.D.S.); (I.R.)
| | - Monica Terracciano
- Department of Pharmacy, University of Naples Federico II, 80131 Naples, Italy
| | - Ilaria Rea
- National Research Council, Institute of Applied Sciences and Intelligent Systems, Unit of Naples, 80131 Naples, Italy; (R.M.); (L.D.S.); (I.R.)
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15
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Khaliq N, Rasheed MA, Khan M, Maqbool M, Ahmad M, Karim S, Nisar A, Schmuki P, Cho SO, Ali G. Voltage-Switchable Biosensor with Gold Nanoparticles on TiO 2 Nanotubes Decorated with CdS Quantum Dots for the Detection of Cholesterol and H 2O 2. ACS APPLIED MATERIALS & INTERFACES 2021; 13:3653-3668. [PMID: 33439005 DOI: 10.1021/acsami.0c19979] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
A thin layer of gold nanoparticles (Au NPs) sputtered on cadmium sulfide quantum dots (CdS QDs) decorated anodic titanium dioxide nanotubes (TNTs) (Au/CdS QDs/TNTs) was fabricated and explored for the nonenzymatic detection of cholesterol and hydrogen peroxide (H2O2). Morphological studies of the sensor revealed the formation of uniform nanotubes decorated with a homogeneously dispersed CdS QDs and Au NPs layer. The electrochemical measurements showed an enhanced electrocatalytic performance with a fast electron transfer (∼2 s) between the redox centers of each analyte and electrode surface. The hybrid nanostructure (Au/CdS QDs/TNTs) electrode exhibited about a 6-fold increase in sensitivity for both cholesterol (10,790 μA mM-1 cm-2) and H2O2 (78,833 μA mM-1 cm-2) in analyses compared to the pristine samples. The hybrid electrode utilized different operational potentials for both analytes, which may lead to a voltage-switchable dual-analyte biosensor with a higher selectivity. The biosensor also demonstrated a good reproducibility, thermal stability, and increased shelf life. In addition, the clinical significance of the biosensor was tested for cholesterol and H2O2 in real blood samples, which showed maximum relative standard deviations of 1.8 and 2.3%, respectively. These results indicate that a Au/CdS QDs/TNTs-based hybrid nanostructure is a promising choice for an enzyme-free biosensor due to its suitable band gap alignment and higher electrocatalytic activities.
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Affiliation(s)
- Nilem Khaliq
- Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad 45650, Pakistan
| | - Muhammad Asim Rasheed
- Department of Physics and Applied Mathematics, Pakistan Institute of Engineering and Applied Sciences (PIEAS), Islamabad 45650, Pakistan
| | - Maaz Khan
- Nanomaterials Research Group (NRG), Physics Division, PINSTECH, Islamabad 44000, Pakistan
| | - Muhammad Maqbool
- Department of Clinical & Diagnostic Sciences, the University of Alabama at Birmingham, Birmingham, Alabama 35294, United States
| | - Mashkoor Ahmad
- Nanomaterials Research Group (NRG), Physics Division, PINSTECH, Islamabad 44000, Pakistan
| | - Shafqat Karim
- Nanomaterials Research Group (NRG), Physics Division, PINSTECH, Islamabad 44000, Pakistan
| | - Amjad Nisar
- Nanomaterials Research Group (NRG), Physics Division, PINSTECH, Islamabad 44000, Pakistan
| | - Patrik Schmuki
- Department of Materials Science and Engineering, University of Erlangen-Nuremberg, Martensstrasse 7, D-91058 Erlangen, Germany
- Department of Chemistry, King Abdulaziz University, Jeddah 21413, Saudi Arabia
| | - Sung Oh Cho
- Department of Nuclear and Quantum Engineering (NQe), KAIST, Daejeon 34141, South Korea
| | - Ghafar Ali
- Nanomaterials Research Group (NRG), Physics Division, PINSTECH, Islamabad 44000, Pakistan
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16
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Yang Z, Li W, Kuang D. Partially disordered nano-porous metallic oxide engineering: surface morphology controllability and multiple scattering properties. NANOTECHNOLOGY 2020; 31:395701. [PMID: 32559750 DOI: 10.1088/1361-6528/ab9e92] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Random multiple light scattering in disordered photonics leads to interesting and unexpected physical phenomena. Here, we demonstrate two types of partially disordered nano-porous metallic oxide materials: disordered grating nano-pores and two-dimensional disordered nano-tubes, which are produced just with one-step anodic oxidation. The relations among the processing parameters, morphology properties and multiple scattering characteristics are investigated. The surface morphology controllability can be achieved by simply changing the processing direct voltages, leading to different scattering properties. The probabilistic model of partially disordered nano-porous metallic oxide is constructed according to the nano-structure characteristics of oxide, and the rigorous coupled wave analysis is utilized for optical field simulation to exhibit the theoretical multiple scattering properties. Futhermore, the experimental scattering fields are measured and are analysed by statistical method. The research focuses on the disorder caused by one-step oxidation, which is distinct from previous studies that introducing disorder into periodic materials, and would open up new prospects for sensing, bionics and structural color.
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Affiliation(s)
- Zhuo Yang
- Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, and Institute of Modern Optics, Nankai University, Tianjin 300350, People's Republic of China
| | - Wenshuang Li
- Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, and Institute of Modern Optics, Nankai University, Tianjin 300350, People's Republic of China
| | - Dengfeng Kuang
- Tianjin Key Laboratory of Micro-scale Optical Information Science and Technology, and Institute of Modern Optics, Nankai University, Tianjin 300350, People's Republic of China
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17
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Bala J, Roy S, John AT, Wadhwa S, Mathur A, Singh D, Devi D, Tripathi A. Ion beam modified TiO 2 nanotubular bio-interface for electrochemical detection of L-tyrosine towards smart bandage application. Colloids Surf B Biointerfaces 2020; 195:111239. [PMID: 32663711 DOI: 10.1016/j.colsurfb.2020.111239] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2020] [Revised: 05/29/2020] [Accepted: 07/01/2020] [Indexed: 10/23/2022]
Abstract
One of the common complications diagnosed in Diabetes Mellitus (DM) patients is Diabetic Foot Ulcers (DFUs). It is a condition wherein the deep tissues located in the lower limb undergo inflammation and infection due to neurological abnormalities (neuropathy) and various degrees of vascular diseases (angiopathy). The concentration of l-tyrosine (Tyr) rises abruptly in DFUs, and therefore may be used as an indicator for early monitoring of the patient's condition during the onset of diabetic foot disease. Herein, we report the electrochemical enzymatic detection of Tyr using low energy ion beam modified titania nanotube (TiNT) thin films with nitrogen (N+) and gold (Au-) ions. Electrochemical Impedance Spectroscopy (EIS) analysis was performed to investigate the levels of Tyr using ion beam modified TiNT thin film electrodes. The modified electrodes exhibited excellent sensor performances with Au-TiNT and N-TiNT within the Tyr concentration range of 100 fM -500 μM with limit of detection (LoD)1.76 nM and 1.25 nM respectively and response time ∼ 1 min. The results indicate that low energy ion beam modified TiNT/enzyme bio-electrodes can potentially be employed as a highly sensitive and portable sensor for real-time detection of l-tyrosine in wound fluids for the development of a smart bandage.
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Affiliation(s)
- Jyoti Bala
- USICT, Guru Gobind Singh Indraprastha University, New Delhi, 110078, India
| | - Souradeep Roy
- Amity Institute of Nanotechnology, Amity University, Noida, 201313, India
| | - Alishba T John
- Amity Institute of Nanotechnology, Amity University, Noida, 201313, India
| | - Shikha Wadhwa
- Amity Institute of Nanotechnology, Amity University, Noida, 201313, India.
| | - Ashish Mathur
- Amity Institute of Nanotechnology, Amity University, Noida, 201313, India.
| | - Devraj Singh
- Department of Physics, Prof. Rajendra Singh (Rajju Bhaiya) Institute of Physical Sciences for Study and Research, V.B.S. Purvanchal University, Jaunpur, 222003, India.
| | - Devarani Devi
- Inter University Accelerator Centre (IUAC), New Delhi, 110067, India
| | - Ambuj Tripathi
- Inter University Accelerator Centre (IUAC), New Delhi, 110067, India
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18
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Amouzadeh Tabrizi M, Ferré-Borrull J, Marsal LF. An optical biosensor for the determination of cathepsin B as a cancer-associated enzyme using nanoporous anodic alumina modified with human serum albumin-thionine. Mikrochim Acta 2020; 187:230. [DOI: 10.1007/s00604-020-4188-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 02/24/2020] [Indexed: 11/28/2022]
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19
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Hasanzadeh Kafshgari M, Goldmann WH. Insights into Theranostic Properties of Titanium Dioxide for Nanomedicine. NANO-MICRO LETTERS 2020; 12:22. [PMID: 34138062 PMCID: PMC7770757 DOI: 10.1007/s40820-019-0362-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 12/08/2019] [Indexed: 05/02/2023]
Abstract
Titanium dioxide (TiO2) nanostructures exhibit a broad range of theranostic properties that make them attractive for biomedical applications. TiO2 nanostructures promise to improve current theranostic strategies by leveraging the enhanced quantum confinement, thermal conversion, specific surface area, and surface activity. This review highlights certain important aspects of fabrication strategies, which are employed to generate multifunctional TiO2 nanostructures, while outlining post-fabrication techniques with an emphasis on their suitability for nanomedicine. The biodistribution, toxicity, biocompatibility, cellular adhesion, and endocytosis of these nanostructures, when exposed to biological microenvironments, are examined in regard to their geometry, size, and surface chemistry. The final section focuses on recent biomedical applications of TiO2 nanostructures, specifically evaluating therapeutic delivery, photodynamic and sonodynamic therapy, bioimaging, biosensing, tissue regeneration, as well as chronic wound healing.
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Affiliation(s)
| | - Wolfgang H Goldmann
- Department of Physics, Biophysics Group, University of Erlangen-Nuremberg, 91052, Erlangen, Germany.
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20
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Carbon Nanotube-Based Electrochemical Biosensor for Label-Free Protein Detection. BIOSENSORS-BASEL 2019; 9:bios9040144. [PMID: 31861101 PMCID: PMC6956173 DOI: 10.3390/bios9040144] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 12/04/2019] [Accepted: 12/09/2019] [Indexed: 12/12/2022]
Abstract
There is a growing need for biosensors that are capable of efficiently and rapidly quantifying protein biomarkers, both in the biological research and clinical setting. While accurate methods for protein quantification exist, the current assays involve sophisticated techniques, take long to administer and often require highly trained personnel for execution and analysis. Herein, we explore the development of a label-free biosensor for the detection and quantification of a standard protein. The developed biosensors comprise carbon nanotubes (CNTs), a specific antibody and cellulose filtration paper. The change in electrical resistance of the CNT-based biosensor system was used to sense a standard protein, bovine serum albumin (BSA) as a proof-of-concept. The developed biosensors were found to have a limit of detection of 2.89 ng/mL, which is comparable to the performance of the typical ELISA method for BSA quantification. Additionally, the newly developed method takes no longer than 10 min to perform, greatly reducing the time of analysis compared to the traditional ELISA technique. Overall, we present a versatile, affordable, simplified and rapid biosensor device capable of providing great benefit to both biological research and clinical diagnostics.
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21
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Sahu DP, Jammalamadaka SN. Detection of bovine serum albumin using hybrid TiO 2 + graphene oxide based Bio - resistive random access memory device. Sci Rep 2019; 9:16141. [PMID: 31695093 PMCID: PMC6834672 DOI: 10.1038/s41598-019-52522-w] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Accepted: 10/15/2019] [Indexed: 11/09/2022] Open
Abstract
Bio - molecules detection and their quantification with a high precision is essential in modern era of medical diagnostics. In this context, the memristor device which can change its resistance state is a promising technique to sense the bio - molecules. In this work, detection of the Bovine Serum Albumin (BSA) protein using resistive switching memristors based on TiO2 and TiO2 + graphene oxide (GO) is explored. The sensitivity of BSA detection is found to be 4 mg/mL. Both the devices show an excellent bipolar resistive switching with an on/off ratio of 73 and 100 respectively, which essentially demonstrates that the device with GO, distinguishes the resistance states with a high precision. The enhanced performance in the GO inserted device (~ 650 cycles) is attributed to the prevention of multi-dimensional and random growth of conductive paths.
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Affiliation(s)
- Dwipak Prasad Sahu
- Magnetic Materials and Device Physics Laboratory, Department of Physics, Indian Institute of Technology Hyderabad, Hyderabad, 502 285, India
| | - S Narayana Jammalamadaka
- Magnetic Materials and Device Physics Laboratory, Department of Physics, Indian Institute of Technology Hyderabad, Hyderabad, 502 285, India.
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22
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Sit I, Xu Z, Grassian VH. Plasma protein adsorption on TiO2 nanoparticles: Impact of surface adsorption on temperature-dependent structural changes. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.06.036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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23
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Nezami S, Sadeghi M. pH-sensitive free AgNPs composite and nanocomposite beads based on starch as drug delivery systems. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02801-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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24
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A Novel Methodology for Economical Scale-Up of TiO2 Nanotubes Fabricated on Ti and Ti Alloys. JOURNAL OF NANOTECHNOLOGY 2019. [DOI: 10.1155/2019/5902346] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
The prospective use of nanotechnology for medical devices is increasing. While the impact of material surface nanopatterning on the biological response is convincing, creating a large surface area with such nanotechnology remains an unmet challenge. In this paper, we describe, for the first time, a reproducible scale-up manufacturing technique for creating controlled nanotubes on the surfaces of Ti and Ti alloys. We describe an average of approximately 7.5-fold increase in cost and time efficiency with regards to the generation of 20, 50, and 100 nm diameter nanotubes using an anodisation technique. These novel materials have great potential in the medical field through their influence on cellular activity, in particular, protein absorption, focal adhesion, and osteoinduction. In this paper, we provide a step-by-step guide to optimise an anodisation system, starting with design rationale, proof of concept, device upscaling, consistency, and reproducibility check, followed by cost and efficiency analysis. We show that the optimised device can produce a high number of anodised specimens with customisable specimen shape at reduced cost and time, without compromising the repeatability and consistency. The device can fabricate highly uniform and vertically oriented TiO2 nanotube layer with desired pore diameters.
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25
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Resistance of Superhydrophobic Surface-Functionalized TiO₂ Nanotubes to Corrosion and Intense Cavitation. NANOMATERIALS 2018; 8:nano8100783. [PMID: 30279353 PMCID: PMC6215275 DOI: 10.3390/nano8100783] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 09/25/2018] [Accepted: 09/27/2018] [Indexed: 12/17/2022]
Abstract
The availability of robust superhydrophobic materials with the ability to withstand harsh environments are in high demand for many applications. In this study, we have presented a simple method to fabricate superhydrophobic materials from TiO2 nanotube arrays (TNTAs) and investigated the resilience of the materials when they are subjected to harsh conditions such as intense cavitation upon ultrasonication, corrosion in saline water, water-jet impact, and abrasion. The TNTAs were prepared by anodization of Ti foil in buffered aqueous electrolyte containing fluoride ions. The hydrophilic TNTAs were functionalized with octadecylphosphonic acid (ODPA) or 1H, 1H′, 2H, 2H′-perfluorodecyl phosphonic acid (PFDPA) to form a self-assembled monolayer on the TNTA surface to produce superhydrophobic ODPA@TNTA or PFDPA@TNTA surfaces. The superhydrophobic ODPA@TNTA and PFDPA@TNTA have contact angles of 156.0° ± 1.5° and 168° ± 1.5°, and contact angle hysteresis of 3.0° and 0.8°, respectively. The superhydrophobic ODPA@TNTA and PFDPA@TNTA were subjected to ultrasonication, corrosion in saline water, and water-jet impact and abrasion, and the resilience of the systems was characterized by electrochemical impedance spectroscopy (EIS), contact angle (CA) measurements, diffuse reflectance Fourier transform infrared spectroscopy (DRIFTS), and field-emission scanning electron microscopy (FESEM). The results presented here show that superhydrophobic ODPA@TNTA and PFDPA@TNTA are robust and resilient under the harsh conditions studied in this work, and indicate the potential of these materials to be deployed in practical applications.
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26
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Liu R, Li W, Cai T, Deng Y, Ding Z, Liu Y, Zhu X, Wang X, Liu J, Liang B, Zheng T, Li J. TiO 2 Nanolayer-Enhanced Fluorescence for Simultaneous Multiplex Mycotoxin Detection by Aptamer Microarrays on a Porous Silicon Surface. ACS APPLIED MATERIALS & INTERFACES 2018; 10:14447-14453. [PMID: 29624041 DOI: 10.1021/acsami.8b01431] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
A new aptamer microarray method on the TiO2-porous silicon (PSi) surface was developed to simultaneously screen multiplex mycotoxins. The TiO2 nanolayer on the surface of PSi can enhance the fluorescence intensity 14 times than that of the thermally oxidized PSi. The aptamer fluorescence signal recovery principle was performed on the TiO2-PSi surface by hybridization duplex strand DNA from the mycotoxin aptamer and antiaptamer, respectively, labeled with fluorescence dye and quencher. The aptamer microarray can simultaneously screen for multiplex mycotoxins with a dynamic linear detection range of 0.1-10 ng/mL for ochratoxin A (OTA), 0.01-10 ng/mL for aflatoxins B1 (AFB1), and 0.001-10 ng/mL for fumonisin B1 (FB1) and limits of detection of 15.4, 1.48, and 0.21 pg/mL for OTA, AFB1, and FB1, respectively. The newly developed method shows good specificity and recovery rates. This method can provide a simple, sensitive, and cost-efficient platform for simultaneous screening of multiplex mycotoxins and can be easily expanded to the other aptamer-based protocol.
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Affiliation(s)
- Rui Liu
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
| | - Wei Li
- Department of Electronic and Electrical Engineering , The University of Sheffield , Sheffield S3 7HQ , U.K
| | - Tingting Cai
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
| | - Yang Deng
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
| | - Zhi Ding
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
| | - Yan Liu
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
| | - Xuerui Zhu
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
| | - Xin Wang
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
| | - Jie Liu
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
| | - Baowen Liang
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
| | - Tiesong Zheng
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
| | - Jianlin Li
- Department of Food Science and Engineering , Nanjing Normal University , Nanjing 210024 , China
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27
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Shi Y, Zhang Q, Zhai TT, Zhou Y, Yang DR, Wang FB, Xia XH. Localized surface plasmon resonance enhanced label-free photoelectrochemical immunoassay by Au-MoS2 nanohybrid. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.03.167] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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28
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TiO2 and its composites as promising biomaterials: a review. Biometals 2018; 31:147-159. [DOI: 10.1007/s10534-018-0078-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 01/26/2018] [Indexed: 01/04/2023]
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30
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Tereshchenko A, Smyntyna V, Ramanavicius A. Interaction mechanism between TiO2 nanostructures and bovine leukemia virus proteins in photoluminescence-based immunosensors. RSC Adv 2018; 8:37740-37748. [PMID: 35558617 PMCID: PMC9089451 DOI: 10.1039/c8ra07347c] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 10/24/2018] [Indexed: 01/05/2023] Open
Abstract
In this research a mechanism of interaction between a semiconducting TiO2 layer and bovine leukemia virus protein gp51, applied in the design of photoluminescence-based immunosensors, is proposed and discussed. Protein gp51 was adsorbed on the surface of a nanostructured TiO2 thin film, formed on glass substrates (TiO2/glass). A photoluminescence (PL) peak shift from 517 nm to 499 nm was observed after modification of the TiO2/glass by adsorbed gp51 (gp51/TiO2/glass). After incubation of the gp51/TiO2/glass in a solution containing anti-gp51, a new structure (anti-gp51/gp51/TiO2/glass) was formed and the PL peak shifted backwards from 499 nm to 516 nm. The above-mentioned PL shifts are attributed to the variations in the self-trapped exciton energy level, which were induced by the changes of electrostatic interaction between the adsorbed gp51 and the negatively charged TiO2 surface. The strength of the electric field affecting the photoluminescence centers, was determined from variations between the PL-spectra of TiO2/glass, gp51/TiO2/glass and anti-gp51/gp51/TiO2/glass. The principle of how these electric field variations are induced has been predicted. The highlighted origin of the changes in the photoluminescence spectra of TiO2 after its protein modification reveals an understanding of the interaction mechanism between TiO2 and proteins that is the key issue responsible for biosensor performance. In this research a mechanism of interaction between a semiconducting TiO2 layer and bovine leukemia virus protein gp51, applied in the design of photoluminescence-based immunosensors, is proposed and discussed.![]()
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Affiliation(s)
- Alla Tereshchenko
- Experimental Physics Department
- Faculty of Mathematics, Physics and Information Technologies
- Odesa National I.I. Mechnikov University
- Odesa
- Ukraine
| | - Valentyn Smyntyna
- Experimental Physics Department
- Faculty of Mathematics, Physics and Information Technologies
- Odesa National I.I. Mechnikov University
- Odesa
- Ukraine
| | - Arunas Ramanavicius
- Department of Physical Chemistry
- Institute of Chemistry
- Faculty of Chemistry and Geosciences
- Vilnius University
- LT-03225 Vilnius
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31
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Zhang Q, Li X, Qian C, Dou L, Cui F, Chen X. Label-free electrochemical immunoassay for neuron specific enolase based on 3D macroporous reduced graphene oxide/polyaniline film. Anal Biochem 2017; 540-541:1-8. [PMID: 29113785 DOI: 10.1016/j.ab.2017.10.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 08/24/2017] [Accepted: 10/11/2017] [Indexed: 01/11/2023]
Abstract
The content of neuron specific enolase (NSE) in serum is considered to be an essential indicator of small cell lung cancer (SCLC). Here, a novel label-free electrochemical immunoassay for the detection of NSE based on the three dimensionally macroporous reduced graphene oxide/polyaniline (3DM rGO/PANI) film has been proposed. The 3DM rGO/PANI film was constructed by electrochemical co-deposition of GO and aniline into the interspaces of a sacrificial silica opal template modified Au slice. During the co-deposition, GO was successfully reduced by aniline and PANI could be deposited on the surfaces of rGO sheets. The ratio of rGO and PANI in the composite was also optimized to achieve the maximum electrochemical performance. The 3DM rGO/PANI composite provided larger specific surface area for the antibody immobilization, exhibited enhanced conductivity for electron transfer, and more important was that PANI acted as the electroactive probe for indicating the NSE concentration. Under the optimal conditions, a linear current response of PANI to NSE concentration was obtained over 0.5 pg mL-1-10.0 ng mL-1 with a detection limit of 0.1 pg mL-1. Moreover, the immunosensor showed excellent selectivity, good stability, satisfactory reproducibility and regeneration, and was employed to detect NSE in clinical serum specimens.
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Affiliation(s)
- Qi Zhang
- Geological Survey of Jiangsu Province, Nanjing 210018, PR China.
| | - Xiaoyan Li
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China
| | - Chunhua Qian
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China
| | - Li Dou
- Wuxi Public Security Bureau, Wuxi 214002, PR China
| | - Feng Cui
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China
| | - Xiaojun Chen
- College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 211816, PR China.
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32
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Jang I, Choi DS, Lee JK, Kim WT, Cha BK, Choi WY. Effect of drug-loaded TiO2 nanotube arrays on osseointegration in an orthodontic miniscrew: an in-vivo pilot study. Biomed Microdevices 2017; 19:94. [DOI: 10.1007/s10544-017-0237-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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33
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Koukouvinos G, Petrou P, Goustouridis D, Misiakos K, Kakabakos S, Raptis I. Development and Bioanalytical Applications of a White Light Reflectance Spectroscopy Label-Free Sensing Platform. BIOSENSORS-BASEL 2017; 7:bios7040046. [PMID: 29027976 PMCID: PMC5746769 DOI: 10.3390/bios7040046] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 10/09/2017] [Accepted: 10/11/2017] [Indexed: 12/15/2022]
Abstract
The development of a sensing platform based on white light reflectance spectroscopy (WLRS) is presented. The evolution of the system, from polymer film characterization and sensing of volatile organic compounds to biosensor for the label-free determination of either high (e.g., proteins) or low molecular weight analytes (e.g., pesticides), is described. At the same time, the passage from single to multi-analyte determinations, and from a laboratory prototype set-up to a compact device appropriate for on-site determination, is outlined. The improvements made on both the sensor and the optical set-up, and the concomitant advances in the analytical characteristics and the robustness of the assays performed with the different layouts, are also presented. Finally, the future perspectives of the system, aiming for the creation of a standalone instrument to be used by non-experts, will be discussed.
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Affiliation(s)
- Georgios Koukouvinos
- Immunoassay/Immunosensors Lab, Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, NCSR "Demokritos", 15310 Aghia Paraskevi, Greece.
| | - Panagiota Petrou
- Immunoassay/Immunosensors Lab, Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, NCSR "Demokritos", 15310 Aghia Paraskevi, Greece.
| | - Dimitrios Goustouridis
- ThetaMetrisis S.A., 12243 Egaleo, Greece.
- Department of Electronics Engineering TEI of Piraeus, 12244 Egaleo, Greece.
| | - Konstantinos Misiakos
- Optical sensors Lab, Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", 15310 Aghia Paraskevi, Greece.
| | - Sotirios Kakabakos
- Immunoassay/Immunosensors Lab, Institute of Nuclear & Radiological Sciences & Technology, Energy & Safety, NCSR "Demokritos", 15310 Aghia Paraskevi, Greece.
| | - Ioannis Raptis
- ThetaMetrisis S.A., 12243 Egaleo, Greece.
- Optical sensors Lab, Institute of Nanoscience and Nanotechnology, NCSR "Demokritos", 15310 Aghia Paraskevi, Greece.
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34
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Zhang Y, Farsinezhad S, D Wiltshire B, Kisslinger R, Kar P, Shankar K. Optical anisotropy in vertically oriented TiO 2 nanotube arrays. NANOTECHNOLOGY 2017; 28:374001. [PMID: 28675755 DOI: 10.1088/1361-6528/aa7d9d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanofabricated optically anisotropic uniaxial thin films with deep submicron feature sizes are emerging as potential platforms for low-loss all-dielectric metamaterials, and for Dyakonov surface wave-based subwavelength optical confinement and guiding at interfaces with isotropic media. In this context, we investigate the optical properties of one such uniaxial platform, namely self-organized titania nanotube arrays (TNTAs) grown by the bottom-up nanofabrication process of electrochemical anodization on silicon wafer substrates, and subsequently annealed at different temperatures, i.e. 500 °C and 750 °C. We performed detailed quantitative analysis of the structure of the TNTAs using x-ray diffraction and Raman spectroscopy, which revealed a measurable phonon confinement in TNTAs annealed at 500 °C. Variable angle spectroscopic ellipsometry was used to investigate the optical anisotropy in two kinds of TNTAs-those constituted by anatase-phase and those containing a mixture of anatase and rutile phases. Both kinds of TNTAs were found to have positive birefringence (Δn) exceeding 0.06 in the spectral region of interest while mixed phase TNTAs exhibited Δn as high as 0.15. The experimentally measured anisotropy in the refractive index of the TNTAs was compared with the predictions of two different effective medium approximations incorporating the uniaxial geometry. The measured value of Δn for TNTAs exceeded that of bulk anatase single crystals, indicating the potential of nanostructured dielectrics to outperform dielectric crystals of the same material with respect to the magnitude of the achievable directional refractive index contrast.
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Affiliation(s)
- Yun Zhang
- Department of Electrical and Computer Engineering, University of Alberta, 9211-116 St, Edmonton, Alberta, T6G 1H9, Canada
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35
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Mauruto de Oliveira GC, P. de Palma E, Kunita MH, Antigo Medeiros R, de Matos R, Francisco KR, Janegitz BC. Tapioca Biofilm Containing Nitrogen-doped Titanium Dioxide Nanoparticles for Electrochemical Detection of 17-β Estradiol. ELECTROANAL 2017. [DOI: 10.1002/elan.201700392] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Gabriela C. Mauruto de Oliveira
- Departamento de Ciências da Natureza, Matemática e Educação; Universidade Federal de São Carlos; 13600-970 Araras, SP Brazil
| | | | - Marcos H. Kunita
- Departamento de Química; Universidade Estadual do Maringá; 87020-900 Maringá, PR Brazil
| | | | - Roberto de Matos
- Departamento de Química; Universidade Estadual de Londrina; 86057-970 Londrina, PR Brazil
| | - Kelly Roberta Francisco
- Departamento de Ciências da Natureza, Matemática e Educação; Universidade Federal de São Carlos; 13600-970 Araras, SP Brazil
| | - Bruno C. Janegitz
- Departamento de Ciências da Natureza, Matemática e Educação; Universidade Federal de São Carlos; 13600-970 Araras, SP Brazil
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36
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Kupcik R, Rehulka P, Bilkova Z, Sopha H, Macak JM. New Interface for Purification of Proteins: One-Dimensional TiO 2 Nanotubes Decorated by Fe 3O 4 Nanoparticles. ACS APPLIED MATERIALS & INTERFACES 2017; 9:28233-28242. [PMID: 28787115 DOI: 10.1021/acsami.7b08445] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
In this work, a high surface area interface, based on anodic one-dimensional (1D) TiO2 nanotubes homogeneously decorated by Fe3O4 nanoparticles (TiO2NTs@Fe3O4NPs) is reported for the first time for an unprecedented purification of His-tagged recombinant proteins. Excellent purification results were achieved from the model protein mixture, as well as from the whole cell lysate (with His-tagged ubiquitin). Compared to a conventional immobilized-metal affinity chromatography (IMAC) system, specific isolation of selected His-tagged proteins on behalf of other proteins was significantly enhanced on TiO2NTs@Fe3O4NPs interface under optimized binding and elution conditions. The combination of specific isolation properties, magnetic features, biocompatibility, and ease of preparation of this material consisting of two basic metal oxides makes it a suitable candidate for future purification of recombinant proteins in biotechnology. The principally new material bears a large potential to open new pathways for discoveries in nanobiotechnology and nanomedicine.
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Affiliation(s)
- Rudolf Kupcik
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice , Studentska 573, 532 10 Pardubice, Czech Republic
| | - Pavel Rehulka
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice , Studentska 573, 532 10 Pardubice, Czech Republic
| | - Zuzana Bilkova
- Department of Biological and Biochemical Sciences, Faculty of Chemical Technology, University of Pardubice , Studentska 573, 532 10 Pardubice, Czech Republic
| | - Hanna Sopha
- Center of Materials and Nanotechnologies, Faculty of Chemical Technology, University of Pardubice , Nam. Cs. Legii 565, 530 02 Pardubice, Czech Republic
| | - Jan M Macak
- Center of Materials and Nanotechnologies, Faculty of Chemical Technology, University of Pardubice , Nam. Cs. Legii 565, 530 02 Pardubice, Czech Republic
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37
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Khoshnood N, Zamanian A, Massoudi A. Mussel-inspired surface modification of titania nanotubes as a novel drug delivery system. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 77:748-754. [PMID: 28532088 DOI: 10.1016/j.msec.2017.03.293] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 10/29/2016] [Accepted: 03/24/2017] [Indexed: 01/28/2023]
Abstract
Titania nanotubes (TNTs) have attracted considerable attention for the development of new devices for local drug delivery applications. In this study TNTs were synthesized by hydrothermal method from titania nanoparticles and then the surface of TNTs were functionalized by in situ polymerization of bioinspired polydopamine (PDA). The proposed strategies emphasized on remarkable properties of these materials and their unique combination to design local drug delivery system with advanced performance. The samples were characterized using Transmission Electron Microscope (TEM), Field Emission Scanning Electron Microscope (FESEM), X-ray diffraction pattern (XRD), Fourier-transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA) and surface area analysis (BET). The results showed that the specific surface area significantly is increased by creating tubular nanostructure. TGA results indicated Surface functionalization of TNTs with PDA (TNTs-PDA) about 19.3% that led to increase biocompatibility and bioactivity of TNTs as well as improve drug loading and release properties. It is attributed to the effect of NH2 groups which immobilize drug molecules on the TNTs. According to the obtained release profiles for the samples, the release profiles followed from a Hill model. Thus, PDA modified TNTs can be excellent candidate as specific drug delivery systems.
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Affiliation(s)
- Negin Khoshnood
- Biomaterials Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC), Tehran, IRAN
| | - Ali Zamanian
- Biomaterials Research Group, Nanotechnology and Advanced Materials Department, Materials and Energy Research Center (MERC), Tehran, IRAN.
| | - Abouzar Massoudi
- Department of Semiconductors, Materials and Energy Research Center (MERC), Tehran, IRAN
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38
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Zhang J, Wang Y, Qin Y, Yu C, Cui L, Shu X, Cui J, Zheng H, Zhang Y, Wu Y. A facile one-step synthesis of Mn3O4 nanoparticles-decorated TiO2 nanotube arrays as high performance electrode for supercapacitors. J SOLID STATE CHEM 2017. [DOI: 10.1016/j.jssc.2016.11.021] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Pallotti DK, Passoni L, Gesuele F, Maddalena P, Di Fonzo F, Lettieri S. Giant O 2-Induced Photoluminescence Modulation in Hierarchical Titanium Dioxide Nanostructures. ACS Sens 2017; 2:61-68. [PMID: 28722431 DOI: 10.1021/acssensors.6b00432] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate exceptionally large modulation of PL intensity in hierarchical titanium dioxide (TiO2) nanostructures exposed to molecular oxygen (O2). Optical responsivities up to about 1100% at 20% O2 concentrations are observed in hyperbranched anatase-phase hierarchical structures, outperforming those obtainable by commercial TiO2 nanopowders (up to a factor of ∼7 for response to synthetic air) and significantly improving the ones typically reported in PL-based opto-chemical gas sensing using MOXs. The improved PL response is discussed in terms of the specific morphology of hierarchical structures, characterized by simultaneous presence of small nanoparticles, large surface areas, and large voids. These characteristics guarantee an optimal interplay between photogenerated charges, PL-active centers, and adsorbed gas molecules. The results highlight the potentialities offered by hierarchical structures based on TiO2 or other MOXs and open interesting scenarios toward the development of all-optical and/or hybrid (opto/electrical) chemical sensors with improved sensitivity.
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Affiliation(s)
- Deborah K. Pallotti
- Institute of Applied Sciences and Intelligent Systems (CNR-ISASI), Via Campi Flegrei 34, I-80078 Pozzuoli, Italy
| | - Luca Passoni
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Via Giovanni Pascoli, 70/3, 20133 Milano, Italy
- Dipartimento
di Fisica, Politecnico di Milano, piazza Leonardo da Vinci 32, Milano 20133 Italy
| | - Felice Gesuele
- Dipartimento
di Fisica “E. Pancini”, Università degli Studi di Napoli “Federico II”, Via Cintia I-80126 Napoli, Italy
| | - Pasqualino Maddalena
- Dipartimento
di Fisica “E. Pancini”, Università degli Studi di Napoli “Federico II”, Via Cintia I-80126 Napoli, Italy
| | - Fabio Di Fonzo
- Center for Nano Science and Technology@PoliMi, Istituto Italiano di Tecnologia, Via Giovanni Pascoli, 70/3, 20133 Milano, Italy
| | - Stefano Lettieri
- Institute of Applied Sciences and Intelligent Systems (CNR-ISASI), Via Campi Flegrei 34, I-80078 Pozzuoli, Italy
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40
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Farsinezhad S, Banerjee SP, Bangalore Rajeeva B, Wiltshire BD, Sharma H, Sura A, Mohammadpour A, Kar P, Fedosejevs R, Shankar K. Reduced Ensemble Plasmon Line Widths and Enhanced Two-Photon Luminescence in Anodically Formed High Surface Area Au-TiO 2 3D Nanocomposites. ACS APPLIED MATERIALS & INTERFACES 2017; 9:740-749. [PMID: 28001362 DOI: 10.1021/acsami.6b13164] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Localized surface plasmon resonances (LSPR) in TiO2 nanorod and nanotube arrays decorated by gold nanoparticles can be exploited to improve photocatalytic activity, enhance nonlinear optical coefficients, and increase light harvesting in solar cells. However, the LSPR typically has a low quality factor, and the resonance is often obscured by the Urbach tail of the TiO2 band gap absorption. Attempts to increase the LSPR extinction intensity by increasing the density of gold nanoparticles on the surface of the TiO2 nanostructures invariably produce peak broadening due to the effects of either agglomeration or polydispersity. We present a new class of hybrid nanostructures containing gold nanoparticles (NPs) partially embedded in nanoporous/nanotubular TiO2 by performing the anodization of cosputtered Ti-Au thin films containing a relatively high ratio of Au:Ti. Our method of anodizing thin film stacks containing alternate layers of Ti and TiAu results in very distinctive LSPR peaks with quality factors as high as 6.9 and ensemble line widths as small as 0.33 eV even in the presence of an Urbach tail. Unusual features in the anodization of such films are observed and explained, including oscillatory current transients and the observation of coherent heterointerfaces between the Au NPs and anatase TiO2. We further show that such a plasmonic NP-embedded nanotube structure dramatically outperforms a plasmonic NP-decorated anodic nanotube structure in terms of the extinction coefficient, and achieves a strongly enhanced two-photon fluorescence due to the high density of gold nanoparticles in the composite film and the plasmonic local field enhancement.
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Affiliation(s)
- Samira Farsinezhad
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Shyama Prasad Banerjee
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Bharath Bangalore Rajeeva
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Benjamin D Wiltshire
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Himani Sharma
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Anton Sura
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Arash Mohammadpour
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Piyush Kar
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Robert Fedosejevs
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
| | - Karthik Shankar
- Department of Electrical and Computer Engineering, University of Alberta , 9211-116 Street, Edmonton, Alberta T6G 1H9, Canada
- NRC National Institute for Nanotechnology , 11421 Saskatchewan Drive NW, Edmonton, Alberta T6G 2M9, Canada
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41
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Fabrication of Fiber Bragg Grating Coating with TiO2 Nanostructured Metal Oxide for Refractive Index Sensor. JOURNAL OF NANOTECHNOLOGY 2017. [DOI: 10.1155/2017/2791282] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
To increase the sensitivity of biosensor a new approach using an optical fiber Bragg grating (FBG) coated with a suitable nanostructured metal oxide (NMO) is proposed which is costly effective compared to other biosensors. Bragg grating was written on a D-shaped optical fiber by phase mask method using a 248 nm KrF excimer laser for a 5 min exposure time producing a grating with a period of 528 nm. Titanium dioxide (TiO2) nanostructured metal oxide was coated over the fiber for the purpose of increasing its sensing area. The etched D-shaped FBG was then coated with 312 nm thick TiO2 nanostructured layer to ensure propagating the radiation modes within the core. The final structure was used to sense deionized water and saline. The etched D-shaped FBG original sensitivity before coating to air-deionized water and to air-saline was 0.314 nm/riu and 0.142 nm/riu, respectively. After coating the sensitivity became 1.257 nm/riu for air-deionized water and 0.857 nm/riu for air-saline.
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42
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Cha BK, Choi DS, Jang I, Choe BH, Choi WY. Orthodontic tunnel miniscrews with and without TiO2 nanotube arrays as a drug-delivery system: In vivo study. Biomed Mater Eng 2016; 27:375-387. [PMID: 27689571 DOI: 10.3233/bme-161597] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Orthodontic tunnel miniscrews with and without TiO2 nanotube arrays were fabricated to improve the induction of new bone formation and osseointegration. To inject the drug of recombinant human bone morphogenetic protein, tunnels in a conventional machined miniscrew were machined by a computer-numerical-control lathe. TiO2 nanotube arrays to load the drug were also formed on the surface of the tunnel miniscrew by anodic oxidation. To obtain clean TiO2 nanotube arrays, two-step anodic oxidation was conducted. The diameters of TiO2 nanotube window and TiO2 nanotube were ∼70 nm and ∼110 nm, respectively. Three groups, i.e., a conventional machined miniscrew, a tunnel miniscrew without TiO2 nanotube arrays, and a tunnel miniscrew with TiO2 nanotube arrays, were prepared and inserted in the legs of five New Zealand White rabbits. In a histomorphometric analysis, the bone implant contact ratios of the tunnel miniscrews with the TiO2 nanotube arrays and without the TiO2 nanotube arrays were 5.84% and 5.88%, respectively. These values were higher than the value of 4.30% for the conventional machined miniscrew. The bone surface ratios in the tunnel miniscrew with and without the TiO2 nanotube were also higher than those of the conventional machined miniscrew. The measured values of the tunnel miniscrew with and without the nanotube and the conventional miniscrew were 76.75%, 73.41%, and 44.82%, respectively, although the differences were statistically insignificant. New bone at three weeks and six weeks after the operations were found in the tunnel miniscrews in fluorescent images. Both the tunnel miniscrews with and without the TiO2 nanotube arrays demonstrated greater bone formation compared to the conventional miniscrews. However, TiO2 nanotube arrays was not likely to provide additional benefit to the tunnel miniscrew. An in vivo study suggested that the tunnel fabricated in the miniscrew can be efficient drug-delivery systems to improve osseointegration.
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Affiliation(s)
- Bong-Kuen Cha
- Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, South Korea.,Research Institute for Dental Engineering, Gangneung-Wonju National University, Gangneung, South Korea
| | - Dong-Soon Choi
- Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, South Korea.,Research Institute for Dental Engineering, Gangneung-Wonju National University, Gangneung, South Korea
| | - Insan Jang
- Department of Orthodontics, College of Dentistry, Gangneung-Wonju National University, Gangneung, South Korea.,Research Institute for Dental Engineering, Gangneung-Wonju National University, Gangneung, South Korea
| | - Byung-Hak Choe
- Department of Metal and Materials Engineering, Gangneung-Wonju National University, Gangneung, South Korea.,Research Institute for Dental Engineering, Gangneung-Wonju National University, Gangneung, South Korea
| | - Won-Youl Choi
- Department of Metal and Materials Engineering, Gangneung-Wonju National University, Gangneung, South Korea.,Research Institute for Dental Engineering, Gangneung-Wonju National University, Gangneung, South Korea
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43
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Fathil M, Md Arshad M, Ruslinda A, Nuzaihan M.N. M, Gopinath SC, Adzhri R, Hashim U. Progression in sensing cardiac troponin biomarker charge transductions on semiconducting nanomaterials. Anal Chim Acta 2016; 935:30-43. [DOI: 10.1016/j.aca.2016.06.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Revised: 05/19/2016] [Accepted: 06/07/2016] [Indexed: 01/27/2023]
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44
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Maggio E, Martsinovich N, Troisi A. Continuum and atomistic description of excess electrons in TiO2. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2016; 28:074004. [PMID: 26808551 DOI: 10.1088/0953-8984/28/7/074004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The modelling of an excess electron in a semiconductor in a prototypical dye sensitised solar cell is carried out using two complementary approaches: atomistic simulation of the TiO2 nanoparticle surface is complemented by a dielectric continuum model of the solvent-semiconductor interface. The two methods are employed to characterise the bound (excitonic) states formed by the interaction of the electron in the semiconductor with a positive charge opposite the interface. Density-functional theory (DFT) calculations show that the excess electron in TiO2 in the presence of a counterion is not fully localised but extends laterally over a large region, larger than system sizes accessible to DFT calculations. The numerical description of the excess electron at the semiconductor-electrolyte interface based on the continuum model shows that the exciton is also delocalised over a large area: the exciton radius can have values from tens to hundreds of Ångströms, depending on the nature of the semiconductor (characterised by the dielectric constant and the electron effective mass in our model).
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Affiliation(s)
- Emanuele Maggio
- Department of Chemistry and Centre for Scientific Computing, University of Warwick, Coventry CV4 7AL, UK
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45
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He JL, Wang DS, Fan SK. Opto-Microfluidic Immunosensors: From Colorimetric to Plasmonic. MICROMACHINES 2016; 7:E29. [PMID: 30407402 PMCID: PMC6189923 DOI: 10.3390/mi7020029] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/13/2015] [Revised: 01/25/2016] [Accepted: 02/04/2016] [Indexed: 02/06/2023]
Abstract
Optical detection has long been the most popular technique in immunosensing. Recent developments in the synthesis of luminescent probes and the fabrication of novel nanostructures enable more sensitive and efficient optical detection, which can be miniaturized and integrated with microfluidics to realize compact lab-on-a-chip immunosensors. These immunosensors are portable, economical and automated, but their sensitivity is not compromised. This review focuses on the incorporation and implementation of optical detection and microfluidics in immunosensors; it introduces the working principles of each optical detection technique and how it can be exploited in immunosensing. The recent progress in various opto-microfluidic immunosensor designs is described. Instead of being comprehensive to include all opto-microfluidic platforms, the report centers on the designs that are promising for point-of-care immunosensing diagnostics, in which ease of use, stability and cost-effective fabrication are emphasized.
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Affiliation(s)
- Jie-Long He
- Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan.
| | - Da-Shin Wang
- Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan.
| | - Shih-Kang Fan
- Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan.
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46
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Zhu J, Huo X, Liu X, Ju H. Gold Nanoparticles Deposited Polyaniline-TiO2 Nanotube for Surface Plasmon Resonance Enhanced Photoelectrochemical Biosensing. ACS APPLIED MATERIALS & INTERFACES 2016; 8:341-349. [PMID: 26673630 DOI: 10.1021/acsami.5b08837] [Citation(s) in RCA: 56] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A novel ternary composite composed of TiO2 nanotubes (TiONTs), polyaniline (PANI), and gold nanoparticles (GNPs) was prepared for photoelectrochemical (PEC) biosensing. PANI was initially coated on TiONTs with an oxidative polymerization method, and 12-phosphotungstic acid was then used as a highly localized photoactive reducing agent to deposit GNPs on TiONT-PANI. The morphology and composition of the composite were characterized by various spectroscopic and microscopic methods. Electrochemical impedance spectroscopy was also conducted to demonstrate the excellent electrical conductivity of the composite. A PEC biosensor was fabricated by immobilizing a mixture of lactate dehydrogenase and the composite onto ITO electrodes, which regenerated nicotinamide adenine dinucleotide (NAD(+)) to complete the enzymatic cycle and led to an improved method for PEC detection of lactate. Because of the surface plasmon resonance enhanced effect of GNPs, the electrochromic performance of PANI, and excellent conductivity and biocompatibility of the composite, this method showed a dynamic range of 0.5-210 μM, sensitivity of 0.0401 μA μM(-1), and a detection limit of 0.15 μM.
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Affiliation(s)
- Jie Zhu
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan Province 475004, PR China
| | - Xiaohe Huo
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan Province 475004, PR China
| | - Xiaoqiang Liu
- Institute of Environmental and Analytical Sciences, College of Chemistry and Chemical Engineering, Henan University , Kaifeng, Henan Province 475004, PR China
| | - Huangxian Ju
- State Key Laboratory of Analytical Chemistry for Life Science, Department of Chemistry, Nanjing University , Nanjing 210023, PR China
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47
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Tam PD, Thang CX. Label-free electrochemical immunosensor based on cerium oxide nanowires for Vibrio cholerae O1 detection. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 58:953-9. [DOI: 10.1016/j.msec.2015.09.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 07/27/2015] [Accepted: 09/07/2015] [Indexed: 10/23/2022]
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48
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Zhang F, Cheng Z, Cui L, Duan T, Anan A, Zhang C, Kang L. Controllable synthesis of Ag@TiO2 heterostructures with enhanced photocatalytic activities under UV and visible excitation. RSC Adv 2016. [DOI: 10.1039/c5ra17762f] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The proposed mechanism of photo-generated charge separation and migration process in the Ag/TiO2 nanoheterostructures under UV light.
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Affiliation(s)
- Fanli Zhang
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
| | - Zhiqiang Cheng
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
- School of Aerospace Engineering
| | - Liying Cui
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
| | - Tingting Duan
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
| | - Ahmed Anan
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
| | - Chunfeng Zhang
- State grid jilin electric power compnay limited electric power research institute
- China
| | - Lijuan Kang
- College of Resources and Environment
- Jilin Agriculture University
- Changchun 130118
- People's Republic of China
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49
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Li J, Xie H, Liu Y, Ren H, Zhao W, Huang X. Au-F127 strawberry-like nanospheres as an electrochemical interface for sensitive detection of carcinoembryonic antigen in real sample. Talanta 2015; 144:404-10. [DOI: 10.1016/j.talanta.2015.06.065] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 06/18/2015] [Accepted: 06/23/2015] [Indexed: 01/31/2023]
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Jang I, Shim SC, Choi DS, Cha BK, Lee JK, Choe BH, Choi WY. Effect of TiO2 nanotubes arrays on osseointegration of orthodontic miniscrew. Biomed Microdevices 2015; 17:76. [DOI: 10.1007/s10544-015-9986-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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