1
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Biswas R. Molecular dynamics simulations of water-ethanol droplet on silicon surface. CHEMICAL PRODUCT AND PROCESS MODELING 2023. [DOI: 10.1515/cppm-2022-0040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
Abstract
Abstract
Molecular dynamics simulations are used to explore the wetting behavior of a water-ethanol droplet on the silicon surface. The effect of ethanol concentration on the wettability of a water-ethanol droplet on the silicon surface was analysed by calculation of contact angle. At 30% ethanol concentrations, the water contact angle was 50.7°, while at 50% ethanol concentrations, it was 36°. The results showed that the contact angle of a droplet on a silicon surface decreases with increasing ethanol concentrations. The formation of hydrogen bonds (HBs) between water-water molecules was 677 for the 30% ethanol system, while at 50% ethanol concentrations, it was 141. The number of hydrogen bonds between water molecules reduces as the ethanol concentrations rise. The HBs between water molecules and the silicon surface is seen to grow as the ethanol concentration rises. The overall potential energies of pure water, 7:3 water-ethanol, and 1:1 water-ethanol systems are −74.4, −96.16, and −158.59 kcal/mol, respectively. The contact angle and number density of water molecules on the surface of the silicon revealed that at different ethanol concentrations, more water molecules are distributed on the silicon surface.
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Affiliation(s)
- Rima Biswas
- Process Simulation Research Group, School of Chemical Engineering , Vellore Institute of Technology , 632014 Vellore , Tamil Nadu , India
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2
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Abbas A, Zhang C, Asad M, Waqas A, Khatoon A, Hussain S, Mir SH. Recent Developments in Artificial Super-Wettable Surfaces Based on Bioinspired Polymeric Materials for Biomedical Applications. Polymers (Basel) 2022; 14:238. [PMID: 35054645 PMCID: PMC8781395 DOI: 10.3390/polym14020238] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 12/29/2021] [Accepted: 01/02/2022] [Indexed: 02/06/2023] Open
Abstract
Inspired by nature, significant research efforts have been made to discover the diverse range of biomaterials for various biomedical applications such as drug development, disease diagnosis, biomedical testing, therapy, etc. Polymers as bioinspired materials with extreme wettable properties, such as superhydrophilic and superhydrophobic surfaces, have received considerable interest in the past due to their multiple applications in anti-fogging, anti-icing, self-cleaning, oil-water separation, biosensing, and effective transportation of water. Apart from the numerous technological applications for extreme wetting and self-cleaning products, recently, super-wettable surfaces based on polymeric materials have also emerged as excellent candidates in studying biological processes. In this review, we systematically illustrate the designing and processing of artificial, super-wettable surfaces by using different polymeric materials for a variety of biomedical applications including tissue engineering, drug/gene delivery, molecular recognition, and diagnosis. Special attention has been paid to applications concerning the identification, control, and analysis of exceedingly small molecular amounts and applications permitting high cell and biomaterial cell screening. Current outlook and future prospects are also provided.
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Affiliation(s)
- Ansar Abbas
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, China; (A.A.); (C.Z.)
| | - Chen Zhang
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, China; (A.A.); (C.Z.)
| | - Muhammad Asad
- Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou 450001, China;
| | - Ahsan Waqas
- Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), School of Chemistry and Chemical Engineering, Shaanxi Normal University, Xi’an 710119, China;
| | - Asma Khatoon
- College of Business Administration, Imam Abdulrahman Bin Faisal University, Dammam 34212, Saudi Arabia;
| | - Sameer Hussain
- School of Chemistry, Xi’an Jiaotong University, Xi’an 710049, China; (A.A.); (C.Z.)
| | - Sajjad Husain Mir
- School of Chemistry and Advanced Materials & BioEngineering Research (AMBER) Center, Trinity College Dublin, The University of Dublin, D02 PN40 Dublin, Ireland
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3
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Pendyala P, Kim HN, Ryu YS, Yoon ES. Time-Dependent Wetting Scenarios of a Water Droplet on Surface-Energy-Controlled Microcavity Structures with Functional Nanocoatings. ACS APPLIED MATERIALS & INTERFACES 2020; 12:39881-39891. [PMID: 32805947 DOI: 10.1021/acsami.0c10618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We report the surface-energy-dependent wetting transition characteristics of an evaporating water droplet on surface-energy-controlled microcavity structures with functional nanocoatings. The droplet wetting scenarios were categorized into four types depending on the synergistic effect of surface energy and pattern size. The silicon (Si) microcavity surfaces (γSi = 69.8 mJ/m2) and the polytetrafluoroethylene (PTFE)-coated microcavity surfaces (γPTFE = 15.0 mJ/m2) displayed stable Wenzel and Cassie wetting states, respectively, irrespective of time. In contrast, diamond-like carbon (DLC)-coated (γDLC = 55.5 mJ/m2) and fluorinated diamond-like carbon (FDLC)-coated (γFDLC = 36.2 mJ/m2) surfaces demonstrated a time-dependent transition of wetting states. In particular, the DLC-coated surface showed random filling of microcavities at the earlier time point, while the FDLC-coated surface displayed directional filling of microcavities at the late stage of drop evaporation. Such dynamic wetting scenarios based on surface energy, in particular, the random and directional wetting transitions related to surface energy of nanocoatings have not been explored previously. Furthermore, the microscopic role of nanocoating in the wetting scenarios was analyzed by monitoring the time-dependent deformation and movement of the air-water interface (AWI) at individual cavities using the fluorescence interference-contrast (FLIC) technique. A coating-dependent depinning mechanism of the AWI was responsible for variable filling of cavities leading to time-dependent wetting scenarios. A capillary wetting model was used to relate this depinning event to the evaporation-induced internal flow within the droplet. Interestingly, FLIC analysis revealed that a hydrophilic nanocoating can induce microscopic hydrophobicity near the cavity edges leading to delayed and variable cavity filling. The surface energy-dependent classification of the wetting scenarios may help the design of novel evaporation-assisted thermodynamic and mass-transfer processes.
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Affiliation(s)
- Prashant Pendyala
- Center for BioMicrosystems, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Hong Nam Kim
- Center for BioMicrosystems, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Division of Bio-Medical Science and Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
| | - Yong-Sang Ryu
- Sensor System Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Eui-Sung Yoon
- Center for BioMicrosystems, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
- Division of Nano & Information Technology, KIST School, Korea University of Science and Technology, Seoul 02792, Republic of Korea
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4
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Lejard-Malki R, Follet J, Vlandas A, Senez V. Selective electrohydrodynamic concentration of waterborne parasites on a chip. LAB ON A CHIP 2018; 18:3310-3322. [PMID: 30283951 DOI: 10.1039/c8lc00840j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Concentrating diluted samples is a key step to improve detection capabilities. The wise use of scaling laws shows the advantages of working with sub-microliter-sized samples. Rapid progress in MEMS technologies has driven the design of integrated platforms performing many biochemical operations. Here we report a new concentrator device based on electro-hydrodynamic forces which can be easily integrated into electrowetting-on-dielectric (EWOD) platforms. This approach is label-free and applicable to a wide range of micro-objects. The detection and analysis of two common waterborne parasites, Cryptosporidium and Giardia, is a perfect test case due to their global health relevance. By fully controlling the interplay of the various forces acting on the micron-sized Cryptosporidium parvum and Cryptosporidium muris oocysts, we show that it is possible to concentrate them on the side of a 10 μL initial drop and then extract them efficiently from a droplet of a few hundred nanoliters. We performed a finite element modeling of the forces acting on the parasites' oocysts to optimize the electrodes' shapes. We obtained state-of-the-art concentration factors of 12 ± 0.4 times and 2 to 4 times in the sub-region of the drop and the extracted droplet, respectively, with an efficiency of 70 ± 6%. Furthermore, this device had the ability to selectively concentrate parasites of different species out of a mix. We demonstrated this by segregating C. parvum oocysts from either Giardia lamblia cysts or its related species, C. muris oocysts.
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Affiliation(s)
- Romuald Lejard-Malki
- CNRS, ISEN, UMR 8520 - IEMN, Univ. Lille, Avenue Poincaré, C.S. 60069, 59652 Villeneuve d'Ascq cedex, Lille F-59000, France.
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5
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Fellahi O, Barras A, Pan GH, Coffinier Y, Hadjersi T, Maamache M, Szunerits S, Boukherroub R. Reduction of Cr(VI) to Cr(III) using silicon nanowire arrays under visible light irradiation. JOURNAL OF HAZARDOUS MATERIALS 2016; 304:441-447. [PMID: 26610097 DOI: 10.1016/j.jhazmat.2015.11.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 11/10/2015] [Accepted: 11/12/2015] [Indexed: 06/05/2023]
Abstract
We report an efficient visible light-induced reduction of hexavalent chromium Cr(VI) to trivalent Cr(III) by direct illumination of an aqueous solution of potassium dichromate (K2Cr2O7) in the presence of hydrogenated silicon nanowires (H-SiNWs) or silicon nanowires decorated with copper nanoparticles (Cu NPs-SiNWs) as photocatalyst. The SiNW arrays investigated in this study were prepared by chemical etching of crystalline silicon in HF/AgNO3 aqueous solution. The Cu NPs were deposited on SiNW arrays via electroless deposition technique. Visible light irradiation of an aqueous solution of K2Cr2O7 (10(-4)M) in presence of H-SiNWs showed that these substrates were not efficient for Cr(VI) reduction. The reduction efficiency achieved was less than 10% after 120 min irradiation at λ>420 nm. Addition of organic acids such as citric or adipic acid in the solution accelerated Cr(VI) reduction in a concentration-dependent manner. Interestingly, Cu NPs-SiNWs was found to be a very efficient interface for the reduction of Cr(VI) to Cr(III) in absence of organic acids. Almost a full reduction of Cr(VI) was achieved by direct visible light irradiation for 140 min using this photocatalyst.
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Affiliation(s)
- Ouarda Fellahi
- Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS 8520, Avenue Poincaré-BP 70478, 59652 Villeneuve d'Ascq Cedex, France; Centre de Recherche en Technologie des Semi-conducteurs pour l'Energétique-CRTSE 02, Bd Frantz Fanon, BP. 140, Alger 7 Merveilles, Algeria
| | - Alexandre Barras
- Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS 8520, Avenue Poincaré-BP 70478, 59652 Villeneuve d'Ascq Cedex, France
| | - Guo-Hui Pan
- State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888 Dong Nanhu Road, Changchun 130033, China
| | - Yannick Coffinier
- Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS 8520, Avenue Poincaré-BP 70478, 59652 Villeneuve d'Ascq Cedex, France
| | - Toufik Hadjersi
- Centre de Recherche en Technologie des Semi-conducteurs pour l'Energétique-CRTSE 02, Bd Frantz Fanon, BP. 140, Alger 7 Merveilles, Algeria
| | - Mustapha Maamache
- Laboratoire de Physique Quantique et Systèmes Dynamiques, Département de Physique, Université de Sétif, Sétif 19000, Algeria
| | - Sabine Szunerits
- Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS 8520, Avenue Poincaré-BP 70478, 59652 Villeneuve d'Ascq Cedex, France
| | - Rabah Boukherroub
- Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS 8520, Avenue Poincaré-BP 70478, 59652 Villeneuve d'Ascq Cedex, France.
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6
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Ganta D, Marry C, Ma J, Sinha S. Hydrophobic recovery in ultrathin PDMS-coated long and short silicon nanowires. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.01.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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7
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Shin S, Seo J, Han H, Kang S, Kim H, Lee T. Bio-Inspired Extreme Wetting Surfaces for Biomedical Applications. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E116. [PMID: 28787916 PMCID: PMC5456462 DOI: 10.3390/ma9020116] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 02/04/2016] [Accepted: 02/15/2016] [Indexed: 12/11/2022]
Abstract
Biological creatures with unique surface wettability have long served as a source of inspiration for scientists and engineers. More specifically, materials exhibiting extreme wetting properties, such as superhydrophilic and superhydrophobic surfaces, have attracted considerable attention because of their potential use in various applications, such as self-cleaning fabrics, anti-fog windows, anti-corrosive coatings, drag-reduction systems, and efficient water transportation. In particular, the engineering of surface wettability by manipulating chemical properties and structure opens emerging biomedical applications ranging from high-throughput cell culture platforms to biomedical devices. This review describes design and fabrication methods for artificial extreme wetting surfaces. Next, we introduce some of the newer and emerging biomedical applications using extreme wetting surfaces. Current challenges and future prospects of the surfaces for potential biomedical applications are also addressed.
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Affiliation(s)
- Sera Shin
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Jungmok Seo
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Heetak Han
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Subin Kang
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Hyunchul Kim
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
| | - Taeyoon Lee
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-Gu, Seoul 03722, Korea.
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8
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Li S, Huang J. Cellulose-Rich Nanofiber-Based Functional Nanoarchitectures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2016; 28:1143-1158. [PMID: 26598324 DOI: 10.1002/adma.201501878] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Revised: 08/23/2015] [Indexed: 06/05/2023]
Abstract
Surface self-assembly of functional molecules or nanoscale building blocks is an effective strategy for the syntheses of advanced materials. Natural cellulose-rich substances have unique macro-to-nano hierarchical structural features. The fabrication of nanoarchitectures, employing specific guest species on the surfaces of the fine structures of such substances, results in corresponding artificial nanomaterials that possess the chemical functionalities and physical properties of both sides. Metal oxide thin film coatings with nanometer precision on the nanofibers of bulk cellulose-rich substances not only yield replicas of nanostructured materials, but also make it possible for further assemblies of functional units on the surfaces. Hence, nanostructured metal oxides and further composites, as well as surface-functionalized cellulose-based composites are fabricated by employing cellulose-rich substances as templates or scaffolds. The three-dimensional cross-linked porous structures, with the high surface area of the resultant nanomaterials or composites, lead to superior performance when employed as photocatalysts, electrode materials, and sensing matrices, on which this report is focused.
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Affiliation(s)
- Shun Li
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, China
| | - Jianguo Huang
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang, 310027, China
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9
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Yu Q, Ista LK, Gu R, Zauscher S, López GP. Nanopatterned polymer brushes: conformation, fabrication and applications. NANOSCALE 2016; 8:680-700. [PMID: 26648412 DOI: 10.1039/c5nr07107k] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Surfaces with end-grafted, nanopatterned polymer brushes that exhibit well-defined feature dimensions and controlled chemical and physical properties provide versatile platforms not only for investigation of nanoscale phenomena at biointerfaces, but also for the development of advanced devices relevant to biotechnology and electronics applications. In this review, we first give a brief introduction of scaling behavior of nanopatterned polymer brushes and then summarize recent progress in fabrication and application of nanopatterned polymer brushes. Specifically, we highlight applications of nanopatterned stimuli-responsive polymer brushes in the areas of biomedicine and biotechnology.
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Affiliation(s)
- Qian Yu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China.
| | - Linnea K Ista
- Center for Biomedical Engineering and Department of Chemical and Biological Engineering, The University of New Mexico, Albuquerque, NM 87131, USA
| | - Renpeng Gu
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA and NSF Research Triangle Materials Research Science & Engineering Center, Duke University, Durham, NC 27708, USA
| | - Stefan Zauscher
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA and NSF Research Triangle Materials Research Science & Engineering Center, Duke University, Durham, NC 27708, USA
| | - Gabriel P López
- Center for Biomedical Engineering and Department of Chemical and Biological Engineering, The University of New Mexico, Albuquerque, NM 87131, USA and Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
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10
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Lee SW, Kang JG. Fabrication and Characterization of Superhydrophilic Layer on PET Film via Silica Nanocompositions. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10355] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Seoung-Won Lee
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
- Sewha P&C, 82-10, Myobong-Ro; Idong-Myeon 449-832 Republic of Korea
| | - Jun-Gill Kang
- Department of Chemistry; Chungnam National University; Daejeon 305-764 Republic of Korea
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11
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Fabrication of superhydrophobic surfaces of cellulose sheets by creating biomimic structures. Chem Res Chin Univ 2014. [DOI: 10.1007/s40242-014-4107-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Zhang L, Yu H, Zhao N, Dang ZM, Xu J. Patterned polymer surfaces with wetting contrast prepared by polydopamine modification. J Appl Polym Sci 2014. [DOI: 10.1002/app.41057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Liang Zhang
- Department of Polymer Science and Engineering; School of Chemistry and Biological Engineering, University of Science & Technology Beijing; 100083 People's Republic of China
- Beijing National Laboratory for Molecular Sciences; Laboratory of Polymer Physics and Chemistry; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 People's Republic of China
| | - Haizhu Yu
- Department of Polymer Science and Engineering; School of Chemistry and Biological Engineering, University of Science & Technology Beijing; 100083 People's Republic of China
| | - Ning Zhao
- Beijing National Laboratory for Molecular Sciences; Laboratory of Polymer Physics and Chemistry; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 People's Republic of China
| | - Zhi-Min Dang
- Department of Polymer Science and Engineering; School of Chemistry and Biological Engineering, University of Science & Technology Beijing; 100083 People's Republic of China
| | - Jian Xu
- Beijing National Laboratory for Molecular Sciences; Laboratory of Polymer Physics and Chemistry; Institute of Chemistry, Chinese Academy of Sciences; Beijing 100190 People's Republic of China
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13
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Micro-and nanostructured silicon-based superomniphobic surfaces. J Colloid Interface Sci 2014; 416:280-8. [DOI: 10.1016/j.jcis.2013.10.065] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 10/28/2013] [Accepted: 10/31/2013] [Indexed: 11/20/2022]
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14
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Yu Q, Liu H, Chen H. Vertical SiNWAs for biomedical and biotechnology applications. J Mater Chem B 2014; 2:7849-7860. [DOI: 10.1039/c4tb01246a] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Vertical silicon nanowire arrays (SiNWAs) are considered as one of the most promising nanomaterials.
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Affiliation(s)
- Qian Yu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123, China
| | - Huan Liu
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123, China
| | - Hong Chen
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123, China
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15
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Xu Y, Wang L, Jiang W, Wang H, Yao J, Guo Q, Yuan L, Chen H. Silicon Nanowire Arrays - A New Catalyst for the Reduction of Nitrobenzene Derivatives. ChemCatChem 2013. [DOI: 10.1002/cctc.201300480] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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16
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Manna U, Lynn DM. Patterning and impregnation of superhydrophobic surfaces using aqueous solutions. ACS APPLIED MATERIALS & INTERFACES 2013; 5:7731-7736. [PMID: 23931600 DOI: 10.1021/am4026467] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report a solvent-assisted approach to the patterning and impregnation of porous superhydrophobic coatings that permits the use of entirely aqueous solutions. This approach permits immobilization of proteins and enzymes, creating opportunities to decorate superhydrophobic surfaces with hydrophilic domains and channels that can capture aliquots of aqueous media, guide and mix aqueous solutions, and chemically process streams of organic molecules. Because this approach does not require destruction of non-wetting features, it can also be used to transfer highly water-soluble polymers and small molecules without compromising superhydrophobicity, providing methods for post-fabrication loading of water-soluble agents into protective non-wetting coatings that are difficult to achieve using other approaches.
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Affiliation(s)
- Uttam Manna
- Department of Chemical and Biological Engineering, 1415 Engineering Drive, 1101 University Avenue, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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17
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Wu Q, Pomerantz AE, Mullins OC, Zare RN. Minimization of fragmentation and aggregation by laser desorption laser ionization mass spectrometry. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:1116-1122. [PMID: 23633019 DOI: 10.1007/s13361-013-0636-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 03/24/2013] [Accepted: 04/02/2013] [Indexed: 06/02/2023]
Abstract
Measuring average quantities in complex mixtures can be challenging for mass spectrometry, as it requires ionization and detection with nearly equivalent cross-section for all components, minimal matrix effect, and suppressed signal from fragments and aggregates. Fragments and aggregates are particularly troublesome for complex mixtures, where they can be incorrectly assigned as parent ions. Here we study fragmentation and aggregation in six aromatic model compounds as well as petroleum asphaltenes (a naturally occurring complex mixture) using two laser-based ionization techniques: surface assisted laser desorption ionization (SALDI), in which a single laser desorbs and ionizes solid analytes; and laser ionization laser desorption mass spectrometry (L(2)MS), in which desorption and ionization are separated spatially and temporally with independent lasers. Model compounds studied include molecules commonly used as matrices in single laser ionization techniques such as matrix assisted laser desorption ionization (MALDI). We find significant fragmentation and aggregation in SALDI, such that individual fragment and aggregate peaks are typically more intense than the parent peak. These fragment and aggregate peaks are expected in MALDI experiments employing these compounds as matrices. On the other hand, we observe no aggregation and only minimal fragmentation in L(2)MS. These results highlight some advantages of L(2)MS for analysis of complex mixtures such as asphaltenes.
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Affiliation(s)
- Qinghao Wu
- Department of Chemistry, Stanford University, Stanford, CA 94305-5080, USA
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18
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Han SW, Lee S, Hong J, Jang E, Lee T, Koh WG. Mutiscale substrates based on hydrogel-incorporated silicon nanowires for protein patterning and microarray-based immunoassays. Biosens Bioelectron 2013; 45:129-35. [DOI: 10.1016/j.bios.2013.01.062] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Revised: 01/11/2013] [Accepted: 01/30/2013] [Indexed: 12/26/2022]
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19
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Coffinier Y, Piret G, Das MR, Boukherroub R. Effect of surface roughness and chemical composition on the wetting properties of silicon-based substrates. CR CHIM 2013. [DOI: 10.1016/j.crci.2012.08.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Dupré M, Enjalbal C, Cantel S, Martinez J, Megouda N, Hadjersi T, Boukherroub R, Coffinier Y. Investigation of Silicon-Based Nanostructure Morphology and Chemical Termination on Laser Desorption Ionization Mass Spectrometry Performance. Anal Chem 2012; 84:10637-44. [DOI: 10.1021/ac3021104] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Mathieu Dupré
- Institut des Biomolécules
Max Mousseron, UMR 5247, Universités Montpellier 1 et 2, CNRS, Bâtiment Chimie (17), Université
Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Christine Enjalbal
- Institut des Biomolécules
Max Mousseron, UMR 5247, Universités Montpellier 1 et 2, CNRS, Bâtiment Chimie (17), Université
Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Sonia Cantel
- Institut des Biomolécules
Max Mousseron, UMR 5247, Universités Montpellier 1 et 2, CNRS, Bâtiment Chimie (17), Université
Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Jean Martinez
- Institut des Biomolécules
Max Mousseron, UMR 5247, Universités Montpellier 1 et 2, CNRS, Bâtiment Chimie (17), Université
Montpellier 2, Place Eugène Bataillon, 34095 Montpellier Cedex
5, France
| | - Nacéra Megouda
- Institut de Recherche Interdisciplinaire, USR CNRS 3078, Parc de la Haute
Borne, 50 avenue de Halley, BP 70478, 59658 Villeneuve d’Ascq,
France
- Unité de Développement de la Technologie du Silicium, 2 Bd. Frantz Fanon, B.P.
140 Alger-7 merveilles, Alger, Algérie
| | - Toufik Hadjersi
- Unité de Développement de la Technologie du Silicium, 2 Bd. Frantz Fanon, B.P.
140 Alger-7 merveilles, Alger, Algérie
| | - Rabah Boukherroub
- Institut de Recherche Interdisciplinaire, USR CNRS 3078, Parc de la Haute
Borne, 50 avenue de Halley, BP 70478, 59658 Villeneuve d’Ascq,
France
| | - Yannick Coffinier
- Institut de Recherche Interdisciplinaire, USR CNRS 3078, Parc de la Haute
Borne, 50 avenue de Halley, BP 70478, 59658 Villeneuve d’Ascq,
France
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21
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Dendane N, Melnyk O, Xu T, Grandidier B, Boukherroub R, Stiévenard D, Coffinier Y. Direct characterization of native chemical ligation of peptides on silicon nanowires. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:13336-13344. [PMID: 22931112 DOI: 10.1021/la3030217] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We describe the site-specific and chemoselective immobilization of peptides on hydrogen-terminated silicon nanowires (SiNWs) using native chemical ligation (NCL) (i.e., the reaction of a thioester group with a cysteine moiety to give a stable amide bond). The SiNWs investigated in this work were grown via a vapor-liquid-solid mechanism and functionalized with a thioester moiety. The immobilization of the peptides on the SiNWs was demonstrated by synthesizing peptides with an N-terminal cysteine residue and labeled with tetramethylrhodamine or trifluoromethyl groups that were detected by fluorescence and X-ray photoelectron spectroscopy, respectively. The peptides labeled with tetramethylrhodamine or trifluoromethyl groups for fluorescence or X-ray photoelectron spectroscopy (XPS) detection studies were synthesized with an N-terminal cysteine residue. N-Terminal seryl peptides and carboxy-terminated SiNWs were used as controls to demonstrate the chemoselectivity of the peptide immobilization.
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Affiliation(s)
- Nabil Dendane
- IBL, UMR CNRS 8161, 1 rue du professeur Calmette, Lille, France
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22
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Dupré M, Coffinier Y, Boukherroub R, Cantel S, Martinez J, Enjalbal C. Laser desorption ionization mass spectrometry of protein tryptic digests on nanostructured silicon plates. J Proteomics 2012; 75:1973-90. [DOI: 10.1016/j.jprot.2011.12.039] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Revised: 12/19/2011] [Accepted: 12/27/2011] [Indexed: 10/14/2022]
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23
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Egatz-Gomez A, Majithia R, Levert C, Meissner KE. Super-wetting, wafer-sized silicon nanowire surfaces with hierarchical roughness and low defects. RSC Adv 2012. [DOI: 10.1039/c2ra22267a] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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24
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Piret G, Kim D, Drobecq H, Coffinier Y, Melnyk O, Schmuki P, Boukherroub R. Surface-assisted laser desorption–ionization mass spectrometry on titanium dioxide (TiO2) nanotube layers. Analyst 2012; 137:3058-63. [DOI: 10.1039/c2an35207a] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Seo J, Lee S, Lee J, Lee T. Guided transport of water droplets on superhydrophobic-hydrophilic patterned Si nanowires. ACS APPLIED MATERIALS & INTERFACES 2011; 3:4722-4729. [PMID: 22091585 DOI: 10.1021/am2011756] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We present a facile method to fabricate hydrophilic patterns in superhydrophobic Si nanowire (NW) arrays for guiding water droplets. The superhydrophobic Si NW arrays were obtained by simple dip-coating of dodecyltrichlorosilane (DTS). The water contact angles (CAs) of DTS-coated Si NW arrays drastically increased and saturated at the superhydrophobic regime (water CA ≥ 150°) as the lengths of NWs increased. The demonstrated superhydrophobic surfaces show an extreme water repellent property and small CA hysteresis of less than 7°, which enable the water droplets to easily roll off. The wettability of the DTS-coated Si NW arrays can be converted from superhydrophobic to hydrophilic via UV-enhanced photodecomposition of the DTS, and such wettability conversion was reproducible on the same surfaces by repeating the DTS coating and photodecomposition processes. The resulting water guiding tracks were successfully demonstrated via selective patterning of the hydrophilic region on superhydrophobic Si NW arrays, which could enable water droplets to move along defined trajectories.
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Affiliation(s)
- Jungmok Seo
- Nanobio Device Laboratory, School of Electrical and Electronic Engineering, Yonsei University, 134 Shinchon-Dong, Seodaemun-Gu, Seoul 120-749, Republic of Korea
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26
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Fellahi O, Das MR, Coffinier Y, Szunerits S, Hadjersi T, Maamache M, Boukherroub R. Silicon nanowire arrays-induced graphene oxide reduction under UV irradiation. NANOSCALE 2011; 3:4662-4669. [PMID: 21960142 DOI: 10.1039/c1nr10970g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
This paper reports on efficient UV irradiation-induced reduction of exfoliated graphene oxide. Direct illumination of an aqueous solution of graphene oxide at λ = 312 nm for 6 h resulted in the formation of graphene nanosheets dispersible in water. X-Ray photoelectron spectroscopy (XPS), UV-vis spectroscopy, atomic force microscopy (AFM) and electrochemical measurements (cyclic voltammetry and electrochemical impedance spectroscopy) suggest a restoration of the sp(2) carbon network. The results were compared with graphene nanosheets prepared by photochemical irradiation of a GO aqueous solution in the presence of hydrogenated silicon nanowire (SiNW) arrays or silicon nanowire arrays decorated with silver (SiNW/Ag NPs) or copper nanoparticles (SiNW/Cu NPs). Graphene nanosheets obtained by illumination of the GO aqueous solution at 312 nm for 6 h in the presence of SiNW/Cu NPs exhibited superior electrochemical charge transfer characteristics. This is mainly due to the higher amount of sp(2)-hybridized carbon in these graphene sheets found by XPS analysis. The high level of extended conjugated carbon network was also evident by the water insoluble nature of the resulting graphene nanosheets, which precipitated upon photochemical reduction.
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Affiliation(s)
- Ouarda Fellahi
- Institut de Recherche Interdisciplinaire (USR-3078), Université de Lille1, Parc de la Haute Borne, 50 avenue de Halley, BP 70478, 59658, Villeneuve d'Ascq, France
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27
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Kim BS, Shin S, Shin SJ, Kim KM, Cho HH. Control of superhydrophilicity/superhydrophobicity using silicon nanowires via electroless etching method and fluorine carbon coatings. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:10148-10156. [PMID: 21728376 DOI: 10.1021/la200940j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Surface roughness is promotive of increasing their hydrophilicity or hydrophobicity to the extreme according to the intrinsic wettability determined by the surface free energy characteristics of a base substrate. Top-down etched silicon nanowires are used to create superhydrophilic surfaces based on the hemiwicking phenomenon. Using fluorine carbon coatings, surfaces are converted from superhydrophilic to superhydrophobic to maintain the Cassie-Baxter state stability by reducing the surface free energy to a quarter compared with intrinsic silicon. We present the robust criteria by controlling the height of the nanoscale structures as a design parameter and design guidelines for superhydrophilic and superhydrophobic conditions. The morphology of the silicon nanowires is used to demonstrate their critical height exceeds several hundred nanometers for superhydrophilicity, and surpasses a micrometer for superhydrophobicity. Especially, SiNWs fabricated with a height of more than a micrometer provide an effective means of maintaining superhydrophilic (<10°) long-term stability.
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Affiliation(s)
- Beom Seok Kim
- Department of Mechanical Engineering, Yonsei University, 262, Seongsanno, Seodaemun-gu, Seoul 120-749, Korea
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28
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Lapierre F, Piret G, Drobecq H, Melnyk O, Coffinier Y, Thomy V, Boukherroub R. High sensitive matrix-free mass spectrometry analysis of peptides using silicon nanowires-based digital microfluidic device. LAB ON A CHIP 2011; 11:1620-1628. [PMID: 21423926 DOI: 10.1039/c0lc00716a] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We present for the first time an electrowetting on dielectric (EWOD) microfluidic system coupled to a surface-assisted laser desorption-ionization (SALDI) silicon nanowire-based interface for mass spectrometry (MS) analysis of small biomolecules. Here, the transfer of analytes has been achieved on specific locations on the SALDI interface followed by their subsequent mass spectrometry analysis without the use of an organic matrix. To achieve this purpose, a device comprising a digital microfluidic system and a patterned superhydrophobic/superhydrophilic silicon nanowire interface was developed. The digital microfluidic system serves for the displacement of the droplets containing analytes, via an electrowetting actuation, inside the superhydrophilic patterns. The nanostructured silicon interface acts as an inorganic target for matrix-free laser desorption-ionization mass spectrometry analysis of the dried analytes. The proposed device can be easily used to realize several basic operations of a Lab-on-Chip such as analyte displacement and rinsing prior to MS analysis. We have demonstrated that the analysis of low molecular weight compounds (700 m/z) can be achieved with a very high sensitivity (down to 10 fmol μL(-1)).
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29
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Jönsson-Niedziółka M, Lapierre F, Coffinier Y, Parry SJ, Zoueshtiagh F, Foat T, Thomy V, Boukherroub R. EWOD driven cleaning of bioparticles on hydrophobic and superhydrophobic surfaces. LAB ON A CHIP 2011; 11:490-6. [PMID: 21103534 DOI: 10.1039/c0lc00203h] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Environmental air monitoring is of great interest due to the large number of people concerned and exposed to different possible risks. From the most common particles in our environment (e.g. by-products of combustion or pollens) to more specific and dangerous agents (e.g. pathogenic micro-organisms), there are a large range of particles that need to be controlled. In this article we propose an original study on the collection of electrostatically deposited particles using electrowetting droplet displacement. A variety of particles were studied, from synthetic particles (e.g. Polystyrene Latex (PSL) microsphere) to different classes of biological particle (proteins, bacterial spores and a viral simulant). Furthermore, we have compared ElectroWetting-On-Dielectric (EWOD) collecting efficiency using either a hydrophobic or a superhydrophobic counter electrode. We observe different cleaning efficiencies, depending on the hydrophobicity of the substrate (varying from 45% to 99%). Superhydrophobic surfaces show the best cleaning efficiency with water droplets for all investigated particles (MS2 bacteriophage, BG (Bacillus atrophaeus) spores, OA (ovalbumin) proteins, and PSL).
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30
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Abstract
Peptide microarrays are useful devices for the high throughput study of biomolecular or peptide-cell interactions. Whereas the synthesis of unmodified peptide libraries is an easy task and can be performed at reasonable cost, the synthesis of libraries of modified peptides remains expensive and time consuming. This bottleneck led us to examine the possibility to produce modified peptide microspots by in situ chemical modification of unmodified peptide microspots. The great advantage would be the preparation of a series of complex microarrays (daughter microarrays) starting from an easy-to-make and cost-effective unmodified peptide microarray (parent microarray). One step toward this goal has been presented in the accompanying chapter dealing with the in situ methylation methodology for studying the specificity of antibodies directed toward methylated epitopes. Here we describe the development of a novel desorption/ionization on silicon nanowires mass spectrometry (DIOSiNWs-MS) technique for characterizing the in situ chemical modification of peptides.
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31
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Megouda N, Cofininier Y, Szunerits S, Hadjersi T, Elkechai O, Boukherroub R. Photocatalytic activity of silicon nanowires under UV and visible light irradiation. Chem Commun (Camb) 2010; 47:991-3. [PMID: 21113518 DOI: 10.1039/c0cc04250a] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The communication reports on the high performance of hydrogen-terminated silicon nanowires and silicon nanowires coated with metal (Ag, Cu) nanostructures for the photodegradation of rhodamine B under UV and visible light irradiation.
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Affiliation(s)
- Nacera Megouda
- Institut de Recherche Interdisciplinaire (IRI, USR-3078), Université Lille1, Parc de la Haute Borne, 50 Avenue de Halley-BP 70478, 59658 Villeneuve d'Ascq, France
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32
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Recent advances in SALDI-MS techniques and their chemical and bioanalytical applications. Anal Bioanal Chem 2010; 399:2597-622. [DOI: 10.1007/s00216-010-4063-3] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2010] [Revised: 07/18/2010] [Accepted: 07/23/2010] [Indexed: 10/19/2022]
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33
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Galopin E, Piret G, Szunerits S, Lequette Y, Faille C, Boukherroub R. Selective adhesion of Bacillus cereus spores on heterogeneously wetted silicon nanowires. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:3479-3484. [PMID: 19891454 DOI: 10.1021/la9030377] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The article reports on the selective adhesion of Bacillus cereus spores on patterned and heterogeneously wetted superhydrophobic silicon nanowires surfaces. Superhydrophilic patterns on superhydrophobic silicon nanowire (SiNW) surfaces were prepared by a standard optical lithography technique. Exposure of the patterned surface to a suspension of B. cereus spores in water led to their specific adsorption in superhydrophobic areas. Comparable results were obtained on a patterned hydrophobic/hydrophilic flat silicon (Si) surface even though a higher concentration of spores was observed on the hydrophobic areas, as compared to the superhydrophobic regions of the SiNW substrate. The surfaces were characterized using scanning electron microscopy (SEM), fluorescence spectroscopy, and contact angle measurements.
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Affiliation(s)
- Elisabeth Galopin
- Institut de Recherche Interdisciplinaire (CNRS-USR 3078), Parc de la Haute Borne, 50 Avenue de Halley, BP 70478, 59658 Villeneuve d'Ascq, France
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34
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Piret G, Drobecq H, Coffinier Y, Melnyk O, Boukherroub R. Matrix-free laser desorption/ionization mass spectrometry on silicon nanowire arrays prepared by chemical etching of crystalline silicon. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:1354-1361. [PMID: 20067318 DOI: 10.1021/la902266x] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This paper reports on the use of silicon nanowires (SiNWs), easily prepared in a single step by chemical etching of crystalline silicon in HF/AgNO(3) aqueous solution, as a highly sensitive substrate for laser desorption/ionization mass spectrometry (LDI-MS) analysis. The SiNWs' diameter and length depend on the etchant concentration and dissolution time. Optimized LDI substrate consists of nanowires with an average diameter in the range of 20-100 nm and 2.5 mum in length. The optimized SiNWs' surface morphology coupled to a controlled surface chemistry allowed a significant LDI-MS performance through measurements of a broad range of analytes, including small molecules, peptides, and a bovine serum albumin (BSA) digest. A signal-to-noise ratio of 250 was ascertained for a 10 fmol bradykinin pick, in reflector mode acquisition. Likewise, the sutent, a small tyrosine kinase inhibitor, could be observed down to 10 fmol, as compared to 500 fmol limit detection using the classical matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). We have further investigated the optical properties of the nanowires, and our results suggest that they have a small or no effect on the desorption/ionization (D/I) process. On the contrary, the surface morphology and thermal properties of the silicon nanostructures are found to be the essential features contributing to the D/I performance.
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Affiliation(s)
- Gaëlle Piret
- Institut de Recherche Interdisciplinaire (CNRS-USR 3078), Parc de la Haute Borne, 50 Avenue de Halley, BP 70478, 59658 Villeneuve d'Ascq, France
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35
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Li S, Wei Y, Huang J. Facile Fabrication of Superhydrophobic Cellulose Materials by a Nanocoating Approach. CHEM LETT 2010. [DOI: 10.1246/cl.2010.20] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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36
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Coffinier Y, Galopin E, Szunerits S, Boukherroub R. Preparation of superhydrophobic and oleophobic diamond nanograss array. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01296c] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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37
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Galopin E, Barbillat J, Coffinier Y, Szunerits S, Patriarche G, Boukherroub R. Silicon nanowires coated with silver nanostructures as ultrasensitive interfaces for surface-enhanced Raman spectroscopy. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1396-1403. [PMID: 20355941 DOI: 10.1021/am900087s] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Silver nanoparticles (Ag NPs) were chemically deposited on silicon nanowires (SiNWs), prepared using the vapor-liquid-solid (VLS) growth mechanism, using an in situ electroless metal deposition technique. The resulting SiNWs/Ag NPs composite interfaces showed large Raman scattering enhancement for rhodamine 6G (R6G) with a detection limit of 10(-14) M and an enhancement factor of 2.3 x 10(8). This large enhancement factor was attributed to the presence of "hot" spots on the SiNWs/Ag NPs substrate.
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Affiliation(s)
- Elisabeth Galopin
- Institut de Recherche Interdisciplinaire (IRI, USR-CNRS 3078) and Institut d'Electronique, de Microelectronique et de Nanotechnologie (IEMN, UMR-CNRS 8520), Cite Scientifique, Avenue Poincare - BP 60069, 59652 Villeneuve d'Ascq, France
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38
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Rizzello L, Shankar SS, Fragouli D, Athanassiou A, Cingolani R, Pompa PP. Microscale patterning of hydrophobic/hydrophilic surfaces by spatially controlled galvanic displacement reactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:6019-23. [PMID: 19391577 DOI: 10.1021/la900893m] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this letter, we report the design and fabrication of different metal patterns for the realization of spatially controlled hydrophobic/hydrophilic regions with micrometer resolution. The fabrication procedure, based on a combination of lithographic techniques and wet-chemistry reactions (namely, spontaneous Galvanic displacement reactions) is reliable, undemanding, and highly versatile, allowing the achievement of precise spatial control along with the use of a wide variety of different materials.
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Affiliation(s)
- L Rizzello
- National Nanotechnology Laboratory of CNR-INFM, IIT Research Unit, Via per Arnesano, 73100 Lecce, Italy
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39
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Lapierre F, Thomy V, Coffinier Y, Blossey R, Boukherroub R. Reversible electrowetting on superhydrophobic double-nanotextured surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:6551-6558. [PMID: 19402607 DOI: 10.1021/la803756f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The paper reports on wetting, electrowetting (EW), and systematic contact angle hysteresis measurements after electrowetting of superhydrophobic silicon nanowire surfaces (NWs). The surfaces consist of C4F8-coated silicon nanowires grown on Si/SiO2 substrate. Different surfaces modulating (i) the dielectric layer thickness and (ii) the nanotexturation were investigated in this study. It was found that the superhydrophobic NWs display different EW behaviors according to their double nanotexturation with varying droplet impalement levels. Some surfaces exhibited a total reversibility to EW with no impalement (contact angle variation of 35+/-2 degrees at 190 VTRMS with deionized water), whereas other surfaces showed nonreversible behavior to EW with partial droplet impalement. A scenario is proposed to explain the unique properties of these surfaces.
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Affiliation(s)
- Florian Lapierre
- Institut d'Electronique, de Microélectronique et de Nanotechnologie (IEMN), UMR CNRS-8520, Cité Scientifique, Avenue Poincaré, BP 60069, 59652 Villeneuve d'Ascq, France
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40
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Kuan WF, Chen LJ. The preparation of superhydrophobic surfaces of hierarchical silicon nanowire structures. NANOTECHNOLOGY 2009; 20:035605. [PMID: 19417300 DOI: 10.1088/0957-4484/20/3/035605] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Superhydrophobic surfaces are prepared by fabricating silicon nanowires to enhance the surface roughness and then modifying the chemical nature of the surface with a self-assembled octadecyltrichlorosilane monolayer to lower the surface energy. All the processes are performed near room temperature. The dynamic contact angle data demonstrate that the water droplet on these surfaces of nanowires can exhibit a transition from the Wenzel state to the Cassie state by simply controlling the etching time. The hierarchical structure is constructed by fabricating the nanopillars (i.e. nanowires) on top of the regular pillar-like silicon wafers. As a consequence, superhydrophobicity could be achieved much more effectively by applying the hierarchical structure.
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Affiliation(s)
- Wei-Fan Kuan
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
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41
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Qian Z, Zhang Z, Song L, Liu H. A novel approach to raspberry-like particles for superhydrophobic materials. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b810808k] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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