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Wang Q, Lin W, Chou S, Dai P, Huang X. Patterned membranes for improving hydrodynamic properties and mitigating membrane fouling in water treatment: A review. WATER RESEARCH 2023; 236:119943. [PMID: 37054608 DOI: 10.1016/j.watres.2023.119943] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 03/27/2023] [Accepted: 04/04/2023] [Indexed: 06/19/2023]
Abstract
Membrane technologies have been widely applied in water treatment over the past few decades. However, membrane fouling remains a hinderance for the widespread use of membrane processes because it decreases effluent quality and increases operating costs. To mitigate membrane fouling, researchers have been exploring effective anti-fouling strategies. Recently, patterned membranes are gaining attention as a novel non-chemical membrane modification for membrane fouling control. In this paper, we review the research on patterned membranes used in water treatment over the past 20 years. In general, patterned membranes show superior anti-fouling performances, which mainly results from two aspects: hydrodynamic effects and interaction effects. Due to the introduction of diversified topographies onto the membrane surface, patterned membranes yield dramatic improvements on hydrodynamic properties, e.g., shear stress, velocity field and local turbulence, restraining concentration polarization and foulants' deposition on the membrane surface. Besides, the membrane-foulant and foulant-foulant interactions play an important role in the mitigation of membrane fouling. Due to the existence of surface patterns, the hydrodynamic boundary layer is destroyed and the interaction force as well as the contact area between foulants and surface are decreased, which contributes to the fouling suppression. However, there are still some limitations in the research and application of patterned membranes. Future research is suggested to focus on the development of patterned membranes appropriate for different water treatment scenarios, the insights into the interaction forces affected by surface patterns, and the pilot-scale and long-term studies to verify the anti-fouling performances of patterned membranes in practical applications.
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Affiliation(s)
- Qiao Wang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China
| | - Weichen Lin
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China.
| | - Shuren Chou
- Beijing OriginWater Membrane Technology Co., Ltd, Beijing 101407, China
| | - Pan Dai
- Beijing OriginWater Membrane Technology Co., Ltd, Beijing 101407, China
| | - Xia Huang
- State Key Joint Laboratory of Environment Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing, 100084, China; Research and Application Center for Membrane Technology, School of Environment, Tsinghua University, Beijing 100084, China.
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2
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Gan Z, Cai J, Sun Z, Chen L, Sun C, Yu J, Liang Z, Min S, Han F, Liu Y, Cheng X, Yu S, Cui D, Li WD. High-fidelity and clean nanotransfer lithography using structure-embedded and electrostatic-adhesive carriers. MICROSYSTEMS & NANOENGINEERING 2023; 9:8. [PMID: 36636368 PMCID: PMC9829746 DOI: 10.1038/s41378-022-00476-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 09/17/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Metallic nanostructures are becoming increasingly important for both fundamental research and practical devices. Many emerging applications employing metallic nanostructures often involve unconventional substrates that are flexible or nonplanar, making direct lithographic fabrication very difficult. An alternative approach is to transfer prefabricated structures from a conventional substrate; however, it is still challenging to maintain high fidelity and a high yield in the transfer process. In this paper, we propose a high-fidelity, clean nanotransfer lithography method that addresses the above challenges by employing a polyvinyl acetate (PVA) film as the transferring carrier and promoting electrostatic adhesion through triboelectric charging. The PVA film embeds the transferred metallic nanostructures and maintains their spacing with a remarkably low variation of <1%. When separating the PVA film from the donor substrate, electrostatic charges are generated due to triboelectric charging and facilitate adhesion to the receiver substrate, resulting in a high large-area transfer yield of up to 99.93%. We successfully transferred the metallic structures of a variety of materials (Au, Cu, Pd, etc.) with different geometries with a <50-nm spacing, high aspect ratio (>2), and complex 3D structures. Moreover, the thin and flexible carrier film enables transfer on highly curved surfaces, such as a single-mode optical fiber with a curvature radius of 62.5 μm. With this strategy, we demonstrate the transfer of metallic nanostructures for a compact spectrometer with Cu nanogratings transferred on a convex lens and for surface-enhanced Raman spectroscopy (SERS) characterization on graphene with reliable responsiveness.
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Affiliation(s)
- Zhuofei Gan
- Department of Mechanical Engineering, University of Hong Kong, Hong Kong, China
- School of Microelectronics, Southern University of Science and Technology, Shenzhen, China
| | - Jingxuan Cai
- Department of Mechanical Engineering, University of Hong Kong, Hong Kong, China
- School of Biomedical Engineering, Sun Yat-sen University, Guangzhou, China
| | - Zhao Sun
- Department of Mechanical Engineering, University of Hong Kong, Hong Kong, China
| | - Liyang Chen
- Department of Mechanical Engineering, University of Hong Kong, Hong Kong, China
| | - Chuying Sun
- Department of Mechanical Engineering, University of Hong Kong, Hong Kong, China
| | - Junyi Yu
- The Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Zeyu Liang
- The Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Siyi Min
- Department of Mechanical Engineering, University of Hong Kong, Hong Kong, China
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Fei Han
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Yu Liu
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Xing Cheng
- Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, China
| | - Shuhui Yu
- The Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Dehu Cui
- School of Microelectronics, Southern University of Science and Technology, Shenzhen, China
| | - Wen-Di Li
- Department of Mechanical Engineering, University of Hong Kong, Hong Kong, China
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3
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Dang T, Li Z, Zhao L, Zhang W, Huang L, Meng F, Liu GL, Hu W. Ultrasensitive Detection of C-Reactive Protein by a Novel Nanoplasmonic Immunoturbidimetry Assay. BIOSENSORS 2022; 12:958. [PMID: 36354468 PMCID: PMC9688280 DOI: 10.3390/bios12110958] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 10/28/2022] [Accepted: 10/29/2022] [Indexed: 06/16/2023]
Abstract
Nanotechnology has attracted much attention, and may become the key to a whole new world in the fields of food, agriculture, building materials, machinery, medicine, and electrical engineering, because of its unique physical and chemical properties, including high surface area and outstanding electrical and optical properties. The bottom-up approach in nanofabrication involves the growth of particles, and we were inspired to propose a novel nanoplasmonic method to detect the formation of nanoparticles in real time. This innovative idea may contribute to the promotion of nanotechnology development. An increase in nanometer particle size leads to optical extinction or density (OD)-value changes in our nanosensor chip at a specific wavelength measured in a generic microplate reader. Moreover, in applying this method, an ultrasensitive nanoplasmonic immunoturbidimetry assay (NanoPITA) was carried out for the high-throughput quantification of hypersensitive C-reactive protein (CRP), a well-known biomarker of cardiovascular, inflammatory, and tumor diseases. The one-step detection of the CRP concentration was completed in 10 min with high fidelity, using the endpoint analysis method. The new NanoPITA method not only produced a linear range from 1 ng/mL to 500 ng/mL CRP with the detection limit reduced to 0.54 ng/mL, which was an improvement of over 1000 times, with respect to regular immunoturbidity measurement, but was also effective in blood detection. This attractive method, combined with surface plasmon resonance and immunoturbidimetry, may become a new technology platform in the application of biological detection.
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Affiliation(s)
- Tang Dang
- School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430022, China
- Department of Bioengineering, The University of Tokyo, 1-3-7 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Zhenyu Li
- Cancer Center, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 JieFang Avenue, Wuhan 430022, China
| | - Liyuan Zhao
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Wei Zhang
- School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Liping Huang
- School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Fanling Meng
- National Engineering Research Center for Nanomedicine, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Gang Logan Liu
- School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Wenjun Hu
- School of Life Science and Technology, Huazhong University of Science and Technology, Wuhan 430022, China
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4
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Nishitsuji R, Sueyoshi K, Hisamoto H, Endo T. Fabrication of Gold Nanostructures on Quartz Crystal Microbalance Surface Using Nanoimprint Lithography for Sensing Applications. MICROMACHINES 2022; 13:1430. [PMID: 36144053 PMCID: PMC9501340 DOI: 10.3390/mi13091430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Revised: 08/23/2022] [Accepted: 08/26/2022] [Indexed: 06/16/2023]
Abstract
A quartz crystal microbalance (QCM) is a sensor that uses the piezoelectric properties of quartz crystals sandwiched between conductive electrodes. Localized surface plasmon resonance (LSPR) is an analytical technique that uses the collective vibration of free electrons on metal surfaces. These measurements are known as analysis techniques that use metal surfaces and have been applied as biosensors because they allow for the label-free monitoring of biomolecular binding reactions. These measurements can be used in combination to analyze the reactions that occur on metal surfaces because different types of information can be obtained from them. However, as different devices are used for these measurements, the results often contain device-to-device errors and are not accurately evaluated. In this study, we directly fabricated gold nanostructures on the surface of a QCM to create a device that can simultaneously measure the mass and refractive index information of the analyte. In addition, the device could be easily fabricated because nanoimprint lithography was used to fabricate gold nanostructures. As a proof of concept, the nanoparticle adsorption on gold nanostructures was evaluated, and it was observed that mass and refractive index information were successfully obtained without device-to-device errors.
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Affiliation(s)
- Ryosuke Nishitsuji
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuencho, Nakaku, Sakai 599-8531, Osaka, Japan
| | - Kenji Sueyoshi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuencho, Nakaku, Sakai 599-8531, Osaka, Japan
- Japan Science and Technology Agency (JST), Precursory Research for Embryonic Science and Technology (PRESTO), 5-3 Yonban-cho, Chiyoda 102-8666, Tokyo, Japan
| | - Hideaki Hisamoto
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuencho, Nakaku, Sakai 599-8531, Osaka, Japan
| | - Tatsuro Endo
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Metropolitan University, 1-1 Gakuencho, Nakaku, Sakai 599-8531, Osaka, Japan
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5
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Study on Filling Capacity of Optical Glass in a Novel Rapid Hot Embossing Process. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12073404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This paper aims to present a novel rapid hot embossing approach and to study filling capacity of optical glass in the hot embossing process. Firstly, a novel rapid hot embossing device is developed, which consists of a rapid heating module and a precision loading module. Particularly, the rapid heating module allows a maximum temperature of 800 °C and a heating rate of 300 °C/min, with decent temperature control accuracy and uniform temperature distribution. In hot embossing process, by incompletely filling the microhole of silicon carbide mold, a microlens would be formed on the surface of glass disc, and the filling capacity of glass is quantified by the maximum height of the microlens. The tailor-made hot embossing device was exploited to conduct a series of experiments for evaluating effects of process parameters on the filling capacity of N-BK7 glass. Experimental results indicate that the filling capacity of glass could be enhanced by increasing the embossing force, the embossing temperature, the soaking time but decreasing the annealing rate. Furthermore, compared to soaking time and annealing rate, embossing force and embossing temperature have more significant influence on the filling capacity of N-BK7 glass. Therefore, the novel rapid hot embossing is a practical and promising technology for fabricating microstructures on glass materials with high softening points.
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6
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Chou SE, Lee KL, Wei PK, Cheng JY. Screening anti-metastasis drugs by cell adhesion-induced color change in a biochip. LAB ON A CHIP 2021; 21:2955-2970. [PMID: 34132296 DOI: 10.1039/d1lc00039j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Metastasis is a frequent complication of cancer and accounts for more than 60% of patients' mortality. Despite technological advancements, treatment options are still limited. Ion channels participate in the regulation of cell adhesion, whilst the regulation of cell adhesion further controls metastasis formation. However, to develop a new ion channel inhibitor targeting metastasis takes tremendous effort and resources; therefore, drug repurposing is an emerging strategy in oncology. In previous studies, we have developed a metal-based nanoslit surface plasmon resonance (SPR) platform to examine the influence of drugs on the cell adhesion process. In this work, we developed a scanner-based cell adhesion kinetic examination (CAKE) system that is capable of monitoring the cell adhesion process by measuring color changes of SPR biosensors. The system's performance was demonstrated by screening the anti-metastasis ability of compounds from a commercial ion-channel inhibitor library. Out of the 274 compounds from the inhibitor library, zinc pyrithione (ZPT) and terfenadine were demonstrated to influence CL1-5 cell adhesion. The cell responses to the two compounds were then compared with those by traditional cell adhesion assays where similar behavior was observed. Further investigation of the two compounds using wound healing and transwell assays was performed and inhibitions of both cell migration and invasion by the two compounds were also observed. The results indicate that ZPT and terfenadine are potential candidates for anti-metastasis drugs. Our work has demonstrated the label-free drug screening ability of our CAKE system for finding potential drugs for cancer treatment.
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Affiliation(s)
- Shih-En Chou
- Research Center for Applied Sciences, Academia Sinica Taiwan, Taipei, 11529, Taiwan.
| | - Kuang-Li Lee
- Research Center for Applied Sciences, Academia Sinica Taiwan, Taipei, 11529, Taiwan.
| | - Pei-Kuen Wei
- Research Center for Applied Sciences, Academia Sinica Taiwan, Taipei, 11529, Taiwan. and Institute of Biophotonics, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Ji-Yen Cheng
- Research Center for Applied Sciences, Academia Sinica Taiwan, Taipei, 11529, Taiwan. and Institute of Biophotonics, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan and Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung, 20224, Taiwan and College of Engineering, Chang Gung University, Taoyuan, 33302, Taiwan
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7
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González-Colsa J, Serrera G, Saiz JM, González F, Moreno F, Albella P. On the performance of a tunable grating-based high sensitivity unidirectional plasmonic sensor. OPTICS EXPRESS 2021; 29:13733-13745. [PMID: 33985103 DOI: 10.1364/oe.422026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 03/18/2021] [Indexed: 06/12/2023]
Abstract
Optical biosensing is currently an intensively active research area, with an increasing demand of highly selective, sensitivity-enhanced and low-cost devices where different plasmonic approaches have been developed. In this work we propose a tunable optimized grating-based gold metasurface that can act both as a high sensitivity sensor device (up to 1500 nm/RIU) and as an unidirectional plasmon source. The theory behind surface plasmon polariton generation is recalled to thoroughly understand the influence that every parameter of the grating source has on the performance of the proposed device. The results and conclusions discussed here offer a key step toward the design of biosensors based on excitation of surface plasmons polaritons by grating-based structures or in the process of creating new nanophotonic circuit devices.
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8
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Chuang CS, Wu CY, Juan PH, Hou NC, Fan YJ, Wei PK, Sheen HJ. LMP1 gene detection using a capped gold nanowire array surface plasmon resonance sensor in a microfluidic chip. Analyst 2020; 145:52-60. [DOI: 10.1039/c9an01419e] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A new detection device by using SPR nanowire array chip and a microfluidics system was developed. A simple, low-cost and reproducible SPR nanowire chip with a visible light source displayed real-time detection capability.
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Affiliation(s)
- Chih-Shen Chuang
- Institute of Applied Mechanics
- National Taiwan University
- Taipei 10617
- Taiwan
- School of Biomedical Engineering
| | - Chieh-Ying Wu
- Institute of Applied Mechanics
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Po-Han Juan
- Institute of Applied Mechanics
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Nai-Cheng Hou
- Institute of Applied Mechanics
- National Taiwan University
- Taipei 10617
- Taiwan
| | - Yu-Jui Fan
- School of Biomedical Engineering
- Taipei Medical University
- Taipei 11031
- Taiwan
- International PhD Program for Biomedical Engineering
| | - Pei-Kuen Wei
- Research Center for Applied Sciences
- Academia Sinica
- Taipei 11529
- Taiwan
| | - Horn-Jiunn Sheen
- Institute of Applied Mechanics
- National Taiwan University
- Taipei 10617
- Taiwan
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9
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Hou HS, Lee KL, Wang CH, Hsieh TH, Sun JJ, Wei PK, Cheng JY. Simultaneous assessment of cell morphology and adhesion using aluminum nanoslit-based plasmonic biosensing chips. Sci Rep 2019; 9:7204. [PMID: 31076598 PMCID: PMC6510726 DOI: 10.1038/s41598-019-43442-w] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 04/24/2019] [Indexed: 11/13/2022] Open
Abstract
A variety of physiological and pathological processes rely on cell adhesion, which is most often tracked by changes in cellular morphology. We previously reported a novel gold nanoslit-based biosensor that is capable of real-time and label-free monitoring of cell morphological changes and cell viability. However, the preparation of gold biosensors is inefficient, complicated and costly. Recently, nanostructure-based aluminum (Al) sensors have been introduced for biosensing applications. The Al-based sensor has a longer decay length and is capable of analyzing large-sized mass such as cells. Here, we developed two types of double-layer Al nanoslit-based plasmonic biosensors, which were nanofabricated and used to evaluate the correlation between metastatic potency and adhesion of lung cancer and melanoma cell lines. Cell adhesion was determined by Fano resonance signals that were induced by binding of the cells to the nanoslit. The peak and dip of the Fano resonance spectrum respectively reflected long- and short-range cellular changes, allowing us to simultaneously detect and distinguish between focal adhesion and cell spreading. Also, the Al nanoslit-based biosensor chips were used to evaluate the inhibitory effects of drugs on cancer cell spreading. We are the first to report the use of double layer Al nanoslit-based biosensors for detection of cell behavior, and such devices may become powerful tools for anti-metastasis drug screening in the future.
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Affiliation(s)
- Hsien-San Hou
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Kuang-Li Lee
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Chen-Hung Wang
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Tung-Han Hsieh
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Juan-Jie Sun
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Pei-Kuen Wei
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan.,Institute of Biophotonics, National Yang-Ming University, Taipei, 11221, Taiwan
| | - Ji-Yen Cheng
- Research Center for Applied Sciences, Academia Sinica, Taipei, 11529, Taiwan. .,Institute of Biophotonics, National Yang-Ming University, Taipei, 11221, Taiwan. .,Department of Mechanical and Mechatronic Engineering, National Taiwan Ocean University, Keelung, 20224, Taiwan. .,College of Engineering, Chang Gung University, Taoyuan, 33302, Taiwan.
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10
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Yeung WK, Chen HY, Sun JJ, Hsieh TH, Mousavi MZ, Chen HH, Lee KL, Lin H, Wei PK, Cheng JY. Multiplex detection of urinary miRNA biomarkers by transmission surface plasmon resonance. Analyst 2019; 143:4715-4722. [PMID: 30188550 DOI: 10.1039/c8an01127c] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The clinical assessment of short-stranded nucleic acid biomarkers such as miRNAs could potentially provide useful information for monitoring disease progression, prompting definitive treatment decisions. In the past decade, advancements in biosensing technology have led to a shift towards rapid, real-time and label-free detection systems; as such, surface plasmon resonance (SPR) biosensor-based technology has become of high interest. Here, we developed an automated multiplex transmissive surface plasmon resonance (t-SPR) platform with the use of a capped gold nanoslit integrated microfluidic surface plasmon resonance (SPR) biosensor. The automated platform was custom designed to allow the analysis of spectral measurements using wavelength shift (dλ), intensity (dI) and novel area change (dA) for surface binding reactions. A simple and compact nanostructure based biosensor was fabricated with multiplex real-time detection capabilities. The sensitivity and specificity of the microfluidic device was demonstrated through the use of functionalised AuNPs for target molecule isolation and signal enhancement in combination with probes on the CG nanoslit surface. Our work allows for the multiplex detection of miRNA at femtomolar concentrations in complex media such as urine.
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Affiliation(s)
- Wing Kiu Yeung
- Research Center for Applied Science, Academia Sinica, Taiwan.
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11
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Lee YC, Chiu CW. Immobilization and 3D Hot-Junction Formation of Gold Nanoparticles on Two-Dimensional Silicate Nanoplatelets as Substrates for High-Efficiency Surface-Enhanced Raman Scattering Detection. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E324. [PMID: 30823691 PMCID: PMC6473534 DOI: 10.3390/nano9030324] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 02/19/2019] [Accepted: 02/20/2019] [Indexed: 11/23/2022]
Abstract
We synthesize a high-efficiency substrate for surface-enhanced Raman scattering (SERS) measurements, which is composed of gold nanoparticles (AuNPs) on two-dimensional silicate nanoplatelets acting as an inorganic stabilizer, via the in-situ reduction of hydrogen tetrachloroaurate (III) by sodium citrate in an aqueous solution. Silicate platelets of ~1-nm thickness and various sizes, viz. laponite (50 nm), sodium montmorillonite (Na⁺⁻MMT, 100 nm), and mica (500 nm), are used to stabilize the AuNPs (Au@silicate), which are formed with uniform diameters ranging between 25 and 30 nm as confirmed by transmission electron microscopy (TEM). In particular, the laponite SERS substrate can be used in biological, environmental, and food safety applications to measure small molecules such as DNA (adenine molecule), dye (Direct Blue), and herbicide (paraquat) as it shows high detection sensitivity with a detection limit of 10-9 M for adenine detection. These highly sensitive SERS substrates, with their three-dimensional hot-junctions formed with AuNPs and two-dimensional silicate nanoplatelets, allow the highly efficient detection of organic molecules. Therefore, these Au@silicate nanohybrid substrates have great potential in biosensor technology because of their environmentally-friendly and simple fabrication process, high efficiency, and the possibility of rapid detection.
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Affiliation(s)
- Yen-Chen Lee
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
| | - Chih-Wei Chiu
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
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12
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Tai YH, Fu PH, Lee KL, Wei PK. Spectral Imaging Analysis for Ultrasensitive Biomolecular Detection Using Gold-Capped Nanowire Arrays. SENSORS (BASEL, SWITZERLAND) 2018; 18:E2181. [PMID: 29986468 PMCID: PMC6068742 DOI: 10.3390/s18072181] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 07/04/2018] [Accepted: 07/05/2018] [Indexed: 02/04/2023]
Abstract
A spectral integration combined with a threshold method for the analysis of spectral scanning surface plasmon resonance (SPR) images can significantly increase signal recognition at low concentration of antibody solution. The 12-well SPR sensing plates consisted of gold-capped nanowire arrays with 500-nm period, 80-nm linewidth and 50-nm gold thickness which were used for generating multiple SPR images. A threshold method is introduced to eliminate background noises in spectral scanning images. Combining spectral integration and the threshold method, the detection limit of antibody concentration was 1.23 ng/mL. Using multiple-well SPR sensing plates and the proposed analytical method, multiple kinetic responses with spectral and spatial information on different sensing areas can be sensitively measured.
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Affiliation(s)
- Yi-Hsin Tai
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.
| | - Po-Han Fu
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.
| | - Kuang-Li Lee
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.
| | - Pei-Kuen Wei
- Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan.
- Institute of Biophotonics, National Yang-Ming University, Taipei 11221, Taiwan.
- Institute of Optoelectronic Sciences, National Taiwan Ocean University, Keelung 20224, Taiwan.
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13
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Lee KL, Tsai PC, You ML, Pan MY, Shi X, Ueno K, Misawa H, Wei PK. Enhancing Surface Sensitivity of Nanostructure-Based Aluminum Sensors Using Capped Dielectric Layers. ACS OMEGA 2017; 2:7461-7470. [PMID: 30023553 PMCID: PMC6044818 DOI: 10.1021/acsomega.7b01349] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 10/23/2017] [Indexed: 06/08/2023]
Abstract
The studies of nanostructure-based aluminum sensors have attracted huge attention because aluminum is a more cost-effective plasmonic material. However, the intrinsic properties of the aluminum metal, having a large imaginary part of the dielectric function and a longer electromagnetic field decay length and problems of poor long-term chemical stability, limit the surface-sensing capability and applicability of nanostructures. We propose the combination of capped aluminum nanoslits and a thin-capped dielectric layer to overcome these limitations. We show that the dielectric layer can positively enhance the wavelength sensitivities of the Wood's anomaly-dominant resonance and asymmetric Fano resonance in capped aluminum nanoslits. The maximum improvement can be reached by a factor of 3.5. Besides, there is an optimal layer thickness for the surface sensitivity because of the trade-off relationship between the refractive index sensitivity and decay length. We attribute the enhanced surface sensitivity to a reduced evanescent length, which is confirmed by the finite difference time-domain calculations. The protein-protein interaction experiments verify the high-surface sensitivity of the structures, and a limit of quantification (LOQ) of 1 pg/mL anti-bovine serum albumin is achieved. Such low-cost, highly sensitive aluminum-based nanostructures can benefit various sensing applications.
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Affiliation(s)
- Kuang-Li Lee
- Research
Center for Applied Sciences, Academia Sinica, 128, Section 2, Academia Road, Nangkang, Taipei 11529, Taiwan
| | - Po-Cheng Tsai
- Institute
of Optoelectronic Sciences, National Taiwan
Ocean University, Keelung 20224, Taiwan
| | - Meng-Lin You
- Research
Center for Applied Sciences, Academia Sinica, 128, Section 2, Academia Road, Nangkang, Taipei 11529, Taiwan
| | - Ming-Yang Pan
- Research
Center for Applied Sciences, Academia Sinica, 128, Section 2, Academia Road, Nangkang, Taipei 11529, Taiwan
| | - Xu Shi
- Research
Institute for Electronic Science, Hokkaido
University, Hokkaido 060-0808, Japan
| | - Kosei Ueno
- Research
Institute for Electronic Science, Hokkaido
University, Hokkaido 060-0808, Japan
| | - Hiroaki Misawa
- Research
Institute for Electronic Science, Hokkaido
University, Hokkaido 060-0808, Japan
- Department
of Applied Chemistry, National Chiao Tung
University, Hsinchu 20010, Taiwan
| | - Pei-Kuen Wei
- Research
Center for Applied Sciences, Academia Sinica, 128, Section 2, Academia Road, Nangkang, Taipei 11529, Taiwan
- Institute
of Optoelectronic Sciences, National Taiwan
Ocean University, Keelung 20224, Taiwan
- Institute
of Biophotonics, National Yang-Ming University, Taipei 11221, Taiwan
| |
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