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Yano K, Matsuie Y, Sato A, Okada M, Akimoto T, Sugimoto I. Characterization of plasma polymerized acetonitrile film for fluorescence enhancement and its application to aptamer-based sandwich assay. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2024; 16:5311-5320. [PMID: 39028106 DOI: 10.1039/d4ay00795f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Among biosensing systems for sensitive diagnoses fluorescence enhancement techniques have attracted considerable attention. This study constructed a simple multilayered structure comprising a plane metal mirror coated with a plasma-polymerized film (PPF) as an optical interference layer on a glass slide for fluorescence enhancement. Plasma polymerization enables the easy deposition of organic thin films containing functional groups, such as amino groups. This study prepared PPFs using acetonitrile as a monomer, and the influences of washing and the output powers of plasma polymerization on PPF thickness were examined by Fourier transform infrared spectroscopy. This is because controlling the PPF thickness is vital in fluorescence enhancement. Multilayered glass slides prepared using a silver layer with 84 nm-thick acetonitrile PPFs exhibited 11- and 281-fold fluorescence enhancements compared with those obtained from the substrates with a bare surface and only modified by the silver layer, respectively. Oligonucleotides labeled with a thiol group and cyanine5 were successfully immobilized on the multilayered substrates, and the fluorescence of the acetonitrile PPFs was superior to that of the allylamine and cyclopropylamine PPFs. Furthermore, an aptamer-based sandwich assay targeting thrombin was performed on the multilayered glass slides, resulting in an approximately 5.1-fold fluorescence enhancement compared with that obtained from the substrate with a bare surface. Calibration curves revealed the relationship between fluorescence intensity and thrombin concentration of 10-1000 nM. This study demonstrates that PPFs can function as materials for fluorescence enhancement, immobilization for biomaterials, and aptamer-based sandwich assays.
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Affiliation(s)
- Kazuyoshi Yano
- Graduate School of Bionics, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan.
| | - Yutaro Matsuie
- Graduate School of Bionics, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan.
| | - Ayaka Sato
- School of Bioscience and Biotechnology, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
| | - Maiko Okada
- Graduate School of Bionics, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan.
| | - Takuo Akimoto
- Graduate School of Bionics, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan.
| | - Iwao Sugimoto
- Graduate School of Computer Sciences, Tokyo University of Technology, 1404-1 Katakura, Hachioji, Tokyo 192-0982, Japan
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Lu KW, Lin YT, Wei HS, Kuo CC. Superhydrophilic Modification of Polycarbonate Substrate Surface by Organic Plasma Polymerization Film. MATERIALS 2022; 15:ma15134411. [PMID: 35806536 PMCID: PMC9267533 DOI: 10.3390/ma15134411] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/08/2022] [Accepted: 06/19/2022] [Indexed: 11/17/2022]
Abstract
Superhydrophilicity performs well in anti-fog and self-cleaning applications. In this study, polycarbonate substrate was used as the modification object because of the low surface energy characteristics of plastics. Procedures that employ plasma bombardment, such as etching and high surface free energy coating, are applied to improve the hydrophilicity. An organic amino silane that contains terminal amine group is introduced as the monomer to perform plasma polymerization to ensure that hydrophilic radicals can be efficiently deposited on substrates. Different levels of hydrophilicity can be reached by modulating the parameters of plasma bombardment and polymerization, such as plasma current, voltage of the ion source, and bombardment time. The surface of a substrate that is subjected to plasma bombarding at 150 V, 4 A for 5 min remained superhydrophilic for 17 days. After 40 min of Ar/O2 plasma bombardment, which resulted in a substrate surface roughness of 51.6 nm, the plasma polymerization of organic amino silane was performed by tuning the anode voltage and operating time of the ion source, and a water contact angle < 10° and durability up to 34 days can be obtained.
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Wei D, Liu J, Wang Z, Zhou S, Wang S, Tong W, Peng J. Quantum Dot Nanobeads Based Fluorescence Immunoassay for the Quantitative Detection of Sulfamethazine in Chicken and Milk. SENSORS 2021; 21:s21196604. [PMID: 34640926 PMCID: PMC8512902 DOI: 10.3390/s21196604] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Revised: 09/24/2021] [Accepted: 09/28/2021] [Indexed: 12/15/2022]
Abstract
Sulfamethazine (SMZ) as a broad antibiotic is widely used in livestock and poultry. However, the abuse of SMZ in livestock feed can lead to SMZ residues in food and the resistance of bacteria to drugs. Thus, a method for the detection of SMZ in food is urgently needed. In this study, quantum dot (QD) nanobeads (QBs) were synthesized by encapsulating CdSe/ZnS QDs using a microemulsion technique. The prepared QBs as signal probes were applied in lateral flow immunoassay (LFIA) for the detection of SMZ in chicken and milk. Our proposed method had limits of detection of 0.1138–0.0955 ng/mL and corresponding linear ranges of 0.2–12.5, 0.1–15 ng/mL in chicken and milk samples, respectively. The recovery of LFIA for the detection of SMZ was 80.9–109.4% and 84–101.6% in chicken and milk samples, respectively. Overall, the developed QBs-LFIA had high reliability and excellent potential for rapid and sensitive screening of SMZ in food.
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Affiliation(s)
- Daixian Wei
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (D.W.); (J.L.); (Z.W.); (S.Z.); (S.W.); (W.T.)
| | - Jintao Liu
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (D.W.); (J.L.); (Z.W.); (S.Z.); (S.W.); (W.T.)
| | - Zexiang Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (D.W.); (J.L.); (Z.W.); (S.Z.); (S.W.); (W.T.)
| | - Shu Zhou
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (D.W.); (J.L.); (Z.W.); (S.Z.); (S.W.); (W.T.)
- Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, China
| | - Suhua Wang
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (D.W.); (J.L.); (Z.W.); (S.Z.); (S.W.); (W.T.)
| | - Weipeng Tong
- State Key Laboratory of Food Science and Technology, Nanchang University, Nanchang 330047, China; (D.W.); (J.L.); (Z.W.); (S.Z.); (S.W.); (W.T.)
- Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, China
| | - Juan Peng
- School of Food Science and Technology, Nanchang University, Nanchang 330047, China
- Correspondence: ; Tel.: +86-18879145029
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Yakoh A, Siangproh W, Chailapakul O, Ngamrojanavanich N. Optical Bioelectronic Device Based on a Screen-Printed Electroluminescent Transducer. ACS APPLIED MATERIALS & INTERFACES 2020; 12:22543-22551. [PMID: 32338866 DOI: 10.1021/acsami.0c03812] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A new class of biosensing transducer based on alternating-current electroluminescent (ACEL) display is demonstrated. Unlike conventional ACEL displays where they have been rigidly used in flexible screens and advertising applications, here, the display is integrated with immunoassay and functioned as an optical transducer. Taking advantage of the reversed ACEL architecture, the display can be simply fabricated on an unconventional paper material without requiring the transparent indium tin oxide (ITO) electrode. The sensing mechanism relies on the promoted electronic conduction from the immunocomplex formation between immobilized antibody, antigen, and nanoparticle labeled antibody. As a result, the electroluminescence could be triggered off instantaneously. To demonstrate the device effectiveness, C-reactive protein (CRP), a particular biomarker of an inflammatory process and cardiovascular disease, is chosen as a model analyte in this work. Additionally, the applicability of the proposed platform is proved efficacious in human serums, showing negligible interference from nontargeting proteins. The sensing display is also capable of performing multiple assays (up to 8) within a single device. This bio-optoelectronic device represents a straightforward yet highly sensitive approach. This ACEL transducer is believed to explore new possibilities for biosensing and exploit in point-of-care testing.
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Affiliation(s)
- Abdulhadee Yakoh
- Electrochemistry and Optical Spectroscopy Center of Excellence (EOSCE), Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Weena Siangproh
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Sukhumvit 23, Wattana, Bangkok 10110, Thailand
| | - Orawon Chailapakul
- Electrochemistry and Optical Spectroscopy Center of Excellence (EOSCE), Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailand
| | - Nattaya Ngamrojanavanich
- Electrochemistry and Optical Spectroscopy Center of Excellence (EOSCE), Department of Chemistry, Faculty of Science, Chulalongkorn University, 254 Phayathai Road, Pathumwan, Bangkok 10330, Thailand
- The Institute of Biotechnology and Genetic Engineering, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand
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Colorimetric immunoassay for human chorionic gonadotropin by using peroxidase-mimicking MnO2 nanorods immobilized in microplate wells. Mikrochim Acta 2019; 186:581. [DOI: 10.1007/s00604-019-3654-8] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Accepted: 07/02/2019] [Indexed: 12/26/2022]
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Kaneko T, Sun Y, Nakajima H, Uchiyama K, Zeng H. Droplet Sensitized Fluorescence Detection for Enzyme-Linked Immune Sorbent Assays on Microwell Plate. Anal Chem 2019; 91:5685-5689. [DOI: 10.1021/acs.analchem.8b05668] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tsuguhiro Kaneko
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Yue Sun
- School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Hizuru Nakajima
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Katsumi Uchiyama
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan
| | - Hulie Zeng
- School of Pharmacy, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
- Department of Applied Chemistry for Environment, Graduate School of Urban Environmental Sciences, Tokyo Metropolitan University, 1-1 Minamiohsawa, Hachioji, Tokyo 192-0397, Japan
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