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Prabowo BA, Fernandes E, Freitas P. A pump-free microfluidic device for fast magnetic labeling of ischemic stroke biomarkers. Anal Bioanal Chem 2022; 414:2571-2583. [PMID: 35088131 DOI: 10.1007/s00216-022-03915-w] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/14/2022] [Accepted: 01/18/2022] [Indexed: 11/01/2022]
Abstract
This research proposes a low-cost and simple operation microfluidic chip to enhance the magnetic labeling efficiency of two ischemic stroke biomarkers: cellular fibronectin (c-Fn) and matrix metallopeptidase 9 (MMP9). This fully portable and pump-free microfluidic chip is operated based on capillary attractions without any external power source and battery. It uses an integrated cellulose sponge to absorb the samples. At the same time, a magnetic field is aligned to hold the target labeled by the magnetic nanoparticles (MNPs) in the pre-concentrated chamber. By using this approach, the specific targets are labeled from the beginning of the sampling process without preliminary sample purification. The proposed study enhanced the labeling efficiency from 1 h to 15 min. The dynamic interactions occur in the serpentine channel, while the crescent formation of MNPs in the pre-concentrated chamber, acting as a magnetic filter, improves the biomarker-MNP interaction. The labeling optimization by the proposed device influences the dynamic range by optimizing the MNP ratio to fit the linear range across the clinical cutoff value. The limits of detection (LODs) of 2.8 ng/mL and 54.6 ng/mL of c-Fn measurement were achieved for undiluted and four times dilutions of MNP, respectively. While for MMP9, the LODs were 11.5 ng/mL for undiluted functionalized MNP and 132 ng/mL for four times dilutions of functionalized MNP. The results highlight the potential use of this device for clinical sample preparation and specific magnetic target labeling. When combined with a detection system, it could also be used as an integrated component of a point-of-care platform.
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Affiliation(s)
- Briliant Adhi Prabowo
- INL - International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, s/n 4715-330, Braga, Portugal
| | - Elisabete Fernandes
- INL - International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, s/n 4715-330, Braga, Portugal.
| | - Paulo Freitas
- INL - International Iberian Nanotechnology Laboratory, Av. Mestre José Veiga, s/n 4715-330, Braga, Portugal.
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2
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Cellulose-based hybrid glycosilicones via grafted-to metal-catalyzed hydrosilylation: “When opposites unite”. Carbohydr Polym 2020; 241:116327. [DOI: 10.1016/j.carbpol.2020.116327] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 04/15/2020] [Accepted: 04/15/2020] [Indexed: 11/20/2022]
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3
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Guo L, Bai Y, Zhang D, Wang G. Synthesis and properties of a glucono-δ-lactone-modified silicone surfactant from high-amine-value amodimethicone. PHOSPHORUS SULFUR 2020. [DOI: 10.1080/10426507.2019.1700378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Lingxiao Guo
- Department of Applied Chemistry, China Research Institute of Daily Chemistry Co., Ltd, Taiyuan, P. R. China
| | - Yanyun Bai
- Department of Applied Chemistry, China Research Institute of Daily Chemistry Co., Ltd, Taiyuan, P. R. China
| | - Dianlong Zhang
- Department of Chemistry, Shanxi Datong University, Datong Shanxi, P. R. China
| | - Guoyong Wang
- Department of Applied Chemistry, China Research Institute of Daily Chemistry Co., Ltd, Taiyuan, P. R. China
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A fully bio-based composite coating with mechanical robustness and dual superlyophobicity for efficient two-way oil/water separation. J Colloid Interface Sci 2019; 549:123-132. [DOI: 10.1016/j.jcis.2019.04.055] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/16/2019] [Accepted: 04/17/2019] [Indexed: 11/23/2022]
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5
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Dobrynin MV, Pretorius C, Kama DV, Roodt A, Boyarskiy VP, Islamova RM. Rhodium(I)-catalysed cross-linking of polysiloxanes conducted at room temperature. J Catal 2019. [DOI: 10.1016/j.jcat.2019.03.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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6
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Hayat Z, El Abed AI. High-Throughput Optofluidic Acquisition of Microdroplets in Microfluidic Systems. MICROMACHINES 2018; 9:E183. [PMID: 30424116 PMCID: PMC6187520 DOI: 10.3390/mi9040183] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 03/26/2018] [Accepted: 04/04/2018] [Indexed: 12/24/2022]
Abstract
Droplet optofluidics technology aims at manipulating the tiny volume of fluids confined in micro-droplets with light, while exploiting their interaction to create "digital" micro-systems with highly significant scientific and technological interests. Manipulating droplets with light is particularly attractive since the latter provides wavelength and intensity tunability, as well as high temporal and spatial resolution. In this review study, we focus mainly on recent methods developed in order to monitor real-time analysis of droplet size and size distribution, active merging of microdroplets using light, or to use microdroplets as optical probes.
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Affiliation(s)
- Zain Hayat
- Laboratoire de Photonique Quantique et Moléculaire, UMR 8537, Ecole Normale Supérieure Paris Saclay, CentraleSupélec, CNRS, Université Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan, France.
| | - Abdel I El Abed
- Laboratoire de Photonique Quantique et Moléculaire, UMR 8537, Ecole Normale Supérieure Paris Saclay, CentraleSupélec, CNRS, Université Paris-Saclay, 61 avenue du Président Wilson, 94235 Cachan, France.
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Hisyam A. Razak A, Szabo P, Skov AL. Enhancement of dielectric permittivity by incorporating PDMS-PEG multiblock copolymers in silicone elastomers. RSC Adv 2015. [DOI: 10.1039/c5ra09708h] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
A silicone elastomer from PDMS-PEG multiblock copolymer has been prepared by use of silylation reactions for both copolymer preparation and crosslinking.
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Affiliation(s)
- Aliff Hisyam A. Razak
- Danish Polymer Center
- Department of Chemical and Biochemical Engineering
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
| | - Peter Szabo
- Danish Polymer Center
- Department of Chemical and Biochemical Engineering
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
| | - Anne Ladegaard Skov
- Danish Polymer Center
- Department of Chemical and Biochemical Engineering
- Technical University of Denmark
- 2800 Kgs. Lyngby
- Denmark
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Precise synthesis of undecenyl poly(ethylene oxide) macromonomers as heterofunctional building blocks for the synthesis of linear diblocks or of branched materials. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.05.021] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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9
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Nge PN, Rogers CI, Woolley AT. Advances in microfluidic materials, functions, integration, and applications. Chem Rev 2013; 113:2550-83. [PMID: 23410114 PMCID: PMC3624029 DOI: 10.1021/cr300337x] [Citation(s) in RCA: 519] [Impact Index Per Article: 47.2] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Pamela N. Nge
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602
| | - Chad I. Rogers
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602
| | - Adam T. Woolley
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602
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Fujii Y, Henares TG, Kawamura K, Endo T, Hisamoto H. Bulk- and surface-modified combinable PDMS capillary sensor array as an easy-to-use sensing device with enhanced sensitivity to elevated concentrations of multiple serum sample components. LAB ON A CHIP 2012; 12:1522-1526. [PMID: 22395813 DOI: 10.1039/c2lc21242k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
To enhance sensitivity and facilitate easy sample introduction into a combinable poly(dimethylsiloxane) (PDMS) capillary (CPC) sensor array, PDMS was modified in bulk and on its surface to prepare "black" PDMS coated with a silver layer and self-assembled monolayer (SAM). India ink, a traditional Japanese black ink, was added to the PDMS pre-polymer for bulk modification. The surface was modified by a silver mirror reaction followed by SAM formation using cysteine. These modifications enhanced the fluorescence signals by reflecting them from the surface and reducing background interference. A decrease in the water contact angle led to enhanced sensitivity and easy sample introduction. Furthermore, a CPC sensor array for multiplex detection of serum sample components was prepared that could quantify the analytes glucose, potassium, and alkaline phosphatase (ALP). When serum samples were introduced by capillary action, the CPC sensor array showed fluorescence responses for each analyte and successfully identified the components with elevated concentrations in the serum samples.
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Affiliation(s)
- Yuji Fujii
- Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan
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Rogers CI, Pagaduan JV, Nordin GP, Woolley AT. Single-monomer formulation of polymerized polyethylene glycol diacrylate as a nonadsorptive material for microfluidics. Anal Chem 2011; 83:6418-25. [PMID: 21728310 DOI: 10.1021/ac201539h] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Nonspecific adsorption in microfluidic systems can deplete target molecules in solution and prevent analytes, especially those at low concentrations, from reaching the detector. Polydimethylsiloxane (PDMS) is a widely used material for microfluidics, but it is prone to nonspecific adsorption, necessitating complex chemical modification processes to address this issue. An alternative material to PDMS that does not require subsequent chemical modification is presented here. Poly(ethylene glycol) diacrylate (PEGDA) mixed with photoinitiator forms on exposure to ultraviolet (UV) radiation a polymer with inherent resistance to nonspecific adsorption. Optimization of the polymerized PEGDA (poly-PEGDA) formula imbues this material with some of the same properties, including optical clarity, water stability, and low background fluorescence, that make PDMS so popular. Poly-PEGDA demonstrates less nonspecific adsorption than PDMS over a range of concentrations of flowing fluorescently tagged bovine serum albumin solutions, and poly-PEGDA has greater resistance to permeation by small hydrophobic molecules than PDMS. Poly-PEGDA also exhibits long-term (hour scale) resistance to nonspecific adsorption compared to PDMS when exposed to a low (1 μg/mL) concentration of a model adsorptive protein. Electrophoretic separations of amino acids and proteins resulted in symmetrical peaks and theoretical plate counts as high as 4 × 10(5)/m. Poly-PEGDA, which displays resistance to nonspecific adsorption, could have broad use in small volume analysis and biomedical research.
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Affiliation(s)
- Chad I Rogers
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, United States
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Bouteau M, Cantin S, Fichet O, Perrot F, Teyssié D. Contribution toward comprehension of contact angle values on single polydimethylsiloxane and poly(ethylene oxide) polymer networks. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:17427-17434. [PMID: 20919692 DOI: 10.1021/la102384s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The large application ranges of polydimethylsiloxane (PDMS) and poly(ethylene oxide) (PEO) based materials justify the importance of controlling polymer surface properties including morphology and wettability behavior. However, it appears that the reported contact angle values of PDMS surfaces show significant scattering which cannot always be interpreted in terms of sole chemical data. In addition, few values are reported concerning pure PEO surfaces, since the polymer generally swells in the presence of water. Thus, in order to correlate surface properties with sample preparation, several single PDMS and PEO polymer networks were synthesized with varying cross-linkers and different cross-linking densities. First, the sample surface topography was systematically analyzed by atomic force microscopy (AFM). It was proven that the removal process of the polymer film from the mold plays a significant role in surface topography according to the vitreous or rubbery state of the given polymer network at room temperature irrespective of mold surface treatment. AFM-scale smooth surfaces can be obtained for all the samples by removing them systematically from the mold at a temperature below the α-relaxation temperature. Dynamic water contact angles were then measured and the values analyzed as a function of cross-linker nature and cross-linking density.
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Affiliation(s)
- Murielle Bouteau
- Laboratoire de Physico-Chimie des Polymères et des Interfaces (LPPI, EA 2528), Institut des Matériaux, Université de Cergy-Pontoise, 5 mail Gay-Lussac Neuville/Oise, 95000 Cergy-Pontoise Cedex, France
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Nakata K, Kimura H, Sakai M, Ochiai T, Sakai H, Murakami T, Abe M, Fujishima A. UV/thermally driven rewritable wettability patterns on TiO2-PDMS composite films. ACS APPLIED MATERIALS & INTERFACES 2010; 2:2485-2488. [PMID: 20712336 DOI: 10.1021/am1005207] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Composite films of TiO2 and polydimethylsiloxane (PDMS) are prepared by a sol-gel method, cured with UV irradiation, and then treated in hot water to crystallize the TiO2 in the film. The presence of anatase TiO2 contributes to the photoinduced superhydrophilicity of the film under UV irradiation. Contact angle studies reveal that the TiO2-PDMS composite film recovers its original hydrophobic state. Hydrophobic-superhydrophilic patterns are successfully formed on the films. The wettability patterns can be erased by UV irradiation and thermal treatment. New wettability patterns can be reconstructed, demonstrating that the film exhibits rewritable wettability without the need for organic chemicals.
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Affiliation(s)
- Kazuya Nakata
- Photocatalyst Group, Kanagawa Academy of Science and Technology, KSP Building West 614, 3-2-1 Sakado, Takatsu-ku, Kawasaki, Kanagawa 213-0012, Japan
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