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Zhang T, Zhu J, Xie M, Meng K, Yao G, Pan T, Gao M, Cheng H, Lin Y. Highly Sensitive Wearable Sensor Based on (001)-Orientated TiO 2 for Real-Time Electrochemical Detection of Dopamine, Tyrosine, and Paracetamol. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2312238. [PMID: 38319031 DOI: 10.1002/smll.202312238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/22/2024] [Indexed: 02/07/2024]
Abstract
The concentration of dopamine (DA) and tyrosine (Tyr) reflects the condition of patients with Parkinson's disease, whereas moderate paracetamol (PA) can help relieve their pain. Therefore, real-time measurements of these bioanalytes have important clinical implications for patients with Parkinson's disease. However, previous sensors suffer from either limited sensitivity or complex fabrication and integration processes. This work introduces a simple and cost-effective method to prepare high-quality, flexible titanium dioxide (TiO2) thin films with highly reactive (001)-facets. The as-fabricated TiO2 film supported by a carbon cloth electrode (i.e., TiO2-CC) allows excellent electrochemical specificity and sensitivity to DA (1.390 µA µM-1 cm-2), Tyr (0.126 µA µM-1 cm-2), and PA (0.0841 µA µM-1 cm-2). More importantly, accurate DA concentration in varied pH conditions can be obtained by decoupling them within a single differential pulse voltammetry measurement without additional sensing units. The TiO2-CC electrochemical sensor can be integrated into a smart diaper to detect the trace amount of DA or an integrated skin-interfaced patch with microfluidic sampling and wireless transmission units for real-time detection of the sweat Try and PA concentration. The wearable sensor based on TiO2-CC prepared by facile manufacturing methods holds great potential in the daily health monitoring and care of patients with neurological disorders.
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Affiliation(s)
- Tianyao Zhang
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Jia Zhu
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
- Yangtze Delta Region Institute (Quzhou), University of Electronic Science and Technology of China, Quzhou, 324000, China
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA
| | - Maowen Xie
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Ke Meng
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Guang Yao
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Taisong Pan
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Min Gao
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
| | - Huanyu Cheng
- Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania, 16802, USA
| | - Yuan Lin
- School of Material and Energy, University of Electronic Science and Technology of China, Chengdu, 610054, China
- Medico-Engineering Cooperation on Applied Medicine Research Center, University of Electronics Science and Technology of China, Chengdu, 610054, China
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Contact Guidance Effect and Prevention of Microfouling on a Beta Titanium Alloy Surface Structured by Electron-Beam Technology. NANOMATERIALS 2021; 11:nano11061474. [PMID: 34199432 PMCID: PMC8227382 DOI: 10.3390/nano11061474] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 05/28/2021] [Accepted: 05/31/2021] [Indexed: 02/06/2023]
Abstract
Nano- and micro-structuring of implantable materials constitute a promising approach to introduce mechanical contact guidance effect, drive cells colonization, as well as to prevent bacteria adhesion and biofilm aggregation, through antifouling topography. Accordingly, this paper aims to extend the application of e-beam surface texturing and nano-structuring to the beta titanium alloys, which are of great interest for biomedical implants because of the low Young modulus and the reduction of the stress shielding effect. The paper shows that surface texturing on the micro-scale (micro-grooves) is functional to a contact guidance effect on gingival fibroblasts. Moreover, nano-structuring, derived from the e-beam surface treatment, is effective to prevent microfouling. In fact, human fibroblasts were cultivated directly onto grooved specimens showing to sense the surface micro-structure thus spreading following the grooves’ orientation. Moreover, Staphylococcus aureus colonies adhesion was prevented by the nano-topographies in comparison to the mirror-polished control, thus demonstrating promising antifouling properties. Furthermore, the research goes into detail to understand the mechanism of microfouling prevention due to nano-topography and microstructure.
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Ji Y, Qi Z, Misra S, Jin R, Ou X, Lin Y, Yang H, Wang H. Breaking Lattice Symmetry in Highly Strained Epitaxial VO 2 Films on Faceted Nanosurface. ACS APPLIED MATERIALS & INTERFACES 2019; 11:44905-44912. [PMID: 31738511 DOI: 10.1021/acsami.9b16455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The lattice symmetry of strongly correlated oxide heterostructures determines their exotic physical properties by coupling the degrees of freedom between lattices and electrons, orbitals, and spin states. Systematic studies on VO2, a Mott insulator, have previously revealed that lattice distortion can be manipulated by the interfacial strain and electronic phase separation can emerge. However, typical epitaxial film-substrate interface strain provides a very limited range for exploring such interface-engineered phenomena. Herein, epitaxially grown VO2 thin films on asymmetrically faceted m-plane sapphire substrates with the hill-and-valley type surfaces have been demonstrated. Interestingly, lattice symmetry breaking has been proven based on the large residual strain from the different faceted planes. By this lattice symmetry breaking, electronic phase separation and metal-insulator transition in the VO2 films are modulated, and anisotropy in optical responses is exhibited. These results on asymmetrical interfacial engineering in oxide heterostructures open up new routes for novel functional materials design and functional electro/optic device nanofabrication.
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Affiliation(s)
- Yanda Ji
- Department of Applied Physics, College of Science , Nanjing University of Aeronautics and Astronautics , 211106 Nanjing , P. R. China
| | - Zhimin Qi
- School of Materials Engineering , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Shikhar Misra
- School of Materials Engineering , Purdue University , West Lafayette , Indiana 47907 , United States
| | - Rongqiang Jin
- Department of Applied Physics, College of Science , Nanjing University of Aeronautics and Astronautics , 211106 Nanjing , P. R. China
| | - Xin Ou
- State Key Laboratory of Functional Material for Informatics, Shanghai Institute of Microsystem and Information Technology , Chinese Academy of Sciences , 200250 Shanghai , P. R. China
| | - Yuan Lin
- State Key Laboratory of Electronic Thin Films and Integrated Devices , University of Electronic Science and Technology of China , 610054 Chengdu , P. R. China
| | - Hao Yang
- Department of Applied Physics, College of Science , Nanjing University of Aeronautics and Astronautics , 211106 Nanjing , P. R. China
| | - Haiyan Wang
- School of Materials Engineering , Purdue University , West Lafayette , Indiana 47907 , United States
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Yao G, Ji Y, Liang W, Gao M, Zheng S, Wang Y, Li H, Wang Z, Chen C, Lin Y. Influence of the vicinal surface on the anisotropic dielectric properties of highly epitaxial Ba 0.7Sr 0.3TiO 3 thin films. NANOSCALE 2017; 9:3068-3078. [PMID: 28191570 DOI: 10.1039/c6nr09044c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Epitaxial thin films of Ba0.7Sr0.3TiO3 (BST) were grown on the designed vicinal single-crystal LaAlO3 (001) substrates to systematically investigate the evolution of microstructures and in-plane dielectric properties of the as-grown films under the strains induced by surface step terraces. Anisotropic dielectric properties were observed, which can be attributed to different tetragonalities induced by vicinal LaAlO3 substrates with miscut orientations along the [100] and [110] directions with different miscut angles of 1.0°, 2.75° and 5.0°. A terrace geometric model with both compressive and tensile strained domains in the BST film was established, which is in good agreement with the experimental results. Our experimental studies not only shed new light on the heteroepitaxial growth mechanism, but also provide a promising platform for the design and integration of high performance device applications.
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Affiliation(s)
- Guang Yao
- State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, P. R. China.
| | - Yanda Ji
- State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, P. R. China.
| | - Weizheng Liang
- State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, P. R. China.
| | - Min Gao
- State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, P. R. China.
| | - Shengliang Zheng
- Department of Materials Physics and Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - You Wang
- Department of Materials Physics and Chemistry, Harbin Institute of Technology, Harbin 150001, P. R. China
| | - Handong Li
- State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, P. R. China.
| | - Zhiming Wang
- State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, P. R. China.
| | - Chonglin Chen
- Department of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, USA
| | - Yuan Lin
- State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu, Sichuan 610054, P. R. China.
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