1
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Li T, Peiris CR, Aragonès AC, Hurtado C, Kicic A, Ciampi S, MacGregor M, Darwish T, Darwish N. Terminal Deuterium Atoms Protect Silicon from Oxidation. ACS APPLIED MATERIALS & INTERFACES 2023; 15:47833-47844. [PMID: 37768872 DOI: 10.1021/acsami.3c11598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/30/2023]
Abstract
In recent years, the hybrid silicon-molecular electronics technology has been gaining significant attention for applications in sensors, photovoltaics, power generation, and molecular electronics devices. However, Si-H surfaces, which are the platforms on which these devices are formed, are prone to oxidation, compromising the mechanical and electronic stability of the devices. Here, we show that when hydrogen is replaced by deuterium, the Si-D surface becomes significantly more resistant to oxidation when either positive or negative voltages are applied to the Si surface. Si-D surfaces are more resistant to oxidation, and their current-voltage characteristics are more stable than those measured on Si-H surfaces. At positive voltages, the Si-D stability appears to be related to the flat band potential of Si-D being more positive compared to Si-H surfaces, making Si-D surfaces less attractive to oxidizing OH- ions. The limited oxidation of Si-D surfaces at negative potentials is interpreted by the frequencies of the Si-D bending modes being coupled to that of the bulk Si surface phonon modes, which would make the duration of the Si-D excited vibrational state significantly less than that of Si-H. The strong surface isotope effect has implications in the design of silicon-based sensing, molecular electronics, and power-generation devices and the interpretation of charge transfer across them.
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Affiliation(s)
- Tiexin Li
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Chandramalika R Peiris
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Albert C Aragonès
- Departament de Ciència de Materials i Química Física, Universitat de Barcelona, Marti i Franquès 1, 08028 Barcelona, Spain
- Institut de Química Teòrica i Computacional (IQTC), Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
| | - Carlos Hurtado
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Anthony Kicic
- Occupation, Environment and Safety, School of Population Health, Curtin University, Bentley, Western Australia 6102, Australia
- Wal-Yan Respiratory Research Centre, Telethon Kids Institute, The University of Western Australia, Nedlands, Western Australia 6009, Australia
- Department of Respiratory and Sleep Medicine, Perth Children's Hospital, Nedlands, Western Australia 6009, Australia
- Centre for Cell Therapy and Regenerative Medicine, The University of Western Australia, Nedlands, Western Australia 6009, Australia
| | - Simone Ciampi
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
| | - Melanie MacGregor
- Flinders Institute for Nanoscale Science & Technology, Flinders University, Bedford Park, South Australia 5042, Australia
| | - Tamim Darwish
- National Deuteration Facility, Australian Nuclear Science and Technology Organisation (ANSTO), New Illawarra Road, Lucas Heights, New South Wales 2234, Australia
| | - Nadim Darwish
- School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia
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Zida SI, Lin YD, Khung YL. Sonochemical Reaction of Bifunctional Molecules on Silicon (111) Hydride Surface. Molecules 2021; 26:6166. [PMID: 34684747 PMCID: PMC8538154 DOI: 10.3390/molecules26206166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2021] [Revised: 09/27/2021] [Accepted: 10/11/2021] [Indexed: 11/25/2022] Open
Abstract
While the sonochemical grafting of molecules on silicon hydride surface to form stable Si-C bond via hydrosilylation has been previously described, the susceptibility towards nucleophilic functional groups during the sonochemical reaction process remains unclear. In this work, a competitive study between a well-established thermal reaction and sonochemical reaction of nucleophilic molecules (cyclopropylamine and 3-Butyn-1-ol) was performed on p-type silicon hydride (111) surfaces. The nature of surface grafting from these reactions was examined through contact angle measurements, X-ray photoelectron spectroscopy (XPS) and atomic force microscopy (AFM). Cyclopropylamine, being a sensitive radical clock, did not experience any ring-opening events. This suggested that either the Si-H may not have undergone homolysis as reported previously under sonochemical reaction or that the interaction to the surface hydride via a lone-pair electron coordination bond was reversible during the process. On the other hand, silicon back-bond breakage and subsequent surface roughening were observed for 3-Butyn-1-ol at high-temperature grafting (≈150 °C). Interestingly, the sonochemical reaction did not produce appreciable topographical changes to surfaces at the nano scale and the further XPS analysis may suggest Si-C formation. This indicated that while a sonochemical reaction may be indifferent towards nucleophilic groups, the surface was more reactive towards unsaturated carbons. To the best of the author's knowledge, this is the first attempt at elucidating the underlying reactivity mechanisms of nucleophilic groups and unsaturated carbon bonds during sonochemical reaction of silicon hydride surfaces.
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Affiliation(s)
- Serge Ismael Zida
- Ph.D. Program of Electrical and Communications Engineering, College of Information and Electrical Engineering, Feng Chia University, No.100 Wenhwa Road, Seatwen, Taichung 40724, Taiwan; (S.I.Z.); (Y.D.L.)
| | - Yue-Der Lin
- Ph.D. Program of Electrical and Communications Engineering, College of Information and Electrical Engineering, Feng Chia University, No.100 Wenhwa Road, Seatwen, Taichung 40724, Taiwan; (S.I.Z.); (Y.D.L.)
- Department of Automatic Control Engineering, Feng Chia University, No.100 Wenhwa Road, Seatwen, Taichung 40724, Taiwan
| | - Yit Lung Khung
- Department of Biological Science and Technology, China Medical University, No.100 Jingmao 1st Road, Beitun District, Taichung City 406, Taiwan
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Bhattacharyya D, Montenegro A, Plymale NT, Dutta C, Lewis NS, Benderskii AV. Vibrational Sum Frequency Generation Spectroscopy Measurement of the Rotational Barrier of Methyl Groups on Methyl-Terminated Silicon(111) Surfaces. J Phys Chem Lett 2019; 10:5434-5439. [PMID: 31442376 DOI: 10.1021/acs.jpclett.9b01487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The methyl-terminated Si(111) surface possesses a 3-fold in-plane symmetry, with the methyl groups oriented perpendicular to the substrate. The propeller-like rotation of the methyl groups is hindered at room temperature and proceeds via 120° jumps between three isoenergetic minima in registry with the crystalline Si substrate. We have used line-shape analysis of polarization-selected vibrational sum frequency generation spectroscopy to determine the rotational relaxation rate of the surface methyl groups and have measured the temperature dependence of the relaxation rate between 20 and 120 °C. By fitting the measured rate to an Arrhenius dependence, we extracted an activation energy (the rotational barrier) of 830 ± 360 cm-1 and an attempt frequency of (2.9 ± 4.2) × 1013 s-1 for the methyl rotation process. Comparison with the harmonic frequency of a methyl group in a 3-fold cosine potential suggests that the hindered rotation occurs via uncorrelated jumps of single methyl groups rather than concerted gear-like rotation.
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Affiliation(s)
- Dhritiman Bhattacharyya
- Department of Chemistry , University of Southern California , Los Angeles , California 90089-0482 , United States
| | - Angelo Montenegro
- Department of Chemistry , University of Southern California , Los Angeles , California 90089-0482 , United States
| | - Noah T Plymale
- Division of Chemistry and Chemical Engineering, and Beckman Institute , California Institute of Technology , Pasadena , California 91125 , United States
| | - Chayan Dutta
- Department of Chemistry , University of Southern California , Los Angeles , California 90089-0482 , United States
| | - Nathan S Lewis
- Division of Chemistry and Chemical Engineering, and Beckman Institute , California Institute of Technology , Pasadena , California 91125 , United States
| | - Alexander V Benderskii
- Department of Chemistry , University of Southern California , Los Angeles , California 90089-0482 , United States
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4
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Rafique S, Idrees M, Bokhari H, Bhatti AS. Ellipsometric-based novel DNA biosensor for label-free, real-time detection of Bordetella parapertussis. J Biol Phys 2019; 45:275-291. [PMID: 31375953 PMCID: PMC6706519 DOI: 10.1007/s10867-019-09528-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Accepted: 06/24/2019] [Indexed: 10/26/2022] Open
Abstract
Pertussis (or whooping cough) is a contagious disease mainly affecting infants and children and predominantly caused by Bordetella pertussis followed by Bordetella parapertussis. B. parapertussis causes a milder cough but usually symptomatically appears like B. pertussis infection. Thus the epidemiology of illness caused by B. parapertussis is not well understood. In this study, a sensitive and specific method for the rapid diagnosis of B. parapertussis is presented. The covalent immobilization of thiol-terminated DNA oligonucleotides (ss DNA SAM) on a silicon surface by disulfide bond formation is investigated with atomic force microscopy (AFM) and ellipsometry. The measurements indicated an average layer thickness of 5 ± 0.84 nm for 2 μg/μl concentration and 24 h incubation time. This thickness changed to 8.4 ± 0.92 nm for the same concentration (2 μg/μl) by altering the incubation time to 48 h. Ellipsometric data recorded before and after hybridization of B. parapertussis revealed an increase in mean grain area from 91 nm2 to 227 nm2 and a change in the refractive index from 1.489 to 1.648 for 2 μg/μl B. parapertussis, respectively. This change in the refractive index was used to evaluate the amount of adsorbed molecules and their density. The results showed that the density of adsorbed molecules increased from 0.2 to 0.97 g/cm3 after B. parapertussis attachment, respectively. To confirm the hybridization of B. parapertussis to ss DNA SAM, the ds DNA SAM was denatured and the ss DNA SAM surface was reproduced with an average height variation of 6.42 ± 0.75 nm. This showed the stability of the DNA film that can be tuned by varying the concentration and incubation time, thus providing a robust method for the label-free detection of B. parapertussis other than routinely used PCR detection.
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Affiliation(s)
- S Rafique
- Department of Physics, Air University, PAF Complex, E-9, Islamabad, 44000, Pakistan.
| | - M Idrees
- Department of Microbiology, COMSATS Institute of Information Technology, Islamabad, 44000, Pakistan
| | - H Bokhari
- Department of Microbiology, COMSATS Institute of Information Technology, Islamabad, 44000, Pakistan
| | - A S Bhatti
- Centre for Micro & Nano Devices, Department of Physics, Faculty of Science, COMSATS Institute of Information Technology, Park Road Campus, Islamabad, 44000, Pakistan
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Chhasatia R, Sweetman MJ, Harding FJ, Waibel M, Kay T, Thomas H, Loudovaris T, Voelcker NH. Non-invasive, in vitro analysis of islet insulin production enabled by an optical porous silicon biosensor. Biosens Bioelectron 2017; 91:515-522. [PMID: 28082240 DOI: 10.1016/j.bios.2017.01.004] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Revised: 12/27/2016] [Accepted: 01/03/2017] [Indexed: 12/16/2022]
Abstract
A label-free porous silicon (pSi) based, optical biosensor, using both an antibody and aptamer bioreceptor motif has been developed for the detection of insulin. Two parallel biosensors were designed and optimised independently, based on each bioreceptor. Both bioreceptors were covalently attached to a thermally hydrosilylated pSi surface though amide coupling, with unreacted surface area rendered stable and low fouling by incorporation of PEG moieties. The insulin detection ability of each biosensor was determined using interferometric reflectance spectroscopy, using a range of different media both with and without serum. Sensing performance was compared in terms of response value, response time and limit of detection (LOD) for each platform. In order to demonstrate the capability of the best performing biosensor to detect insulin from real samples, an in vitro investigation with the aptamer-modified surface was performed. This biosensor was exposed to buffer conditioned by glucose-stimulated human islets, with the result showing a positive response and a high degree of selectivity towards insulin capture. The obtained results correlated well with the ELISA used in the clinic for assaying glucose-stimulated insulin release from donor islets. We anticipate that this type of sensor can be applied as a rapid point-of-use biosensor to assess the quality of donor islets in terms of their insulin production efficiency, prior to transplantation.
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Affiliation(s)
- Rinku Chhasatia
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Martin J Sweetman
- Experimental Therapeutics Laboratory, Hanson Institute and Samson Institute, School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA 5000, Australia
| | - Frances J Harding
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia
| | - Michaela Waibel
- St. Vincent's Institute of Medical Research, Victoria 3065, Australia
| | - Tom Kay
- St. Vincent's Institute of Medical Research, Victoria 3065, Australia
| | - Helen Thomas
- St. Vincent's Institute of Medical Research, Victoria 3065, Australia
| | - Thomas Loudovaris
- St. Vincent's Institute of Medical Research, Victoria 3065, Australia
| | - Nicolas H Voelcker
- ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia.
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6
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Yang J, Siriwardena A, Boukherroub R, Ozanam F, Szunerits S, Gouget-Laemmel AC. A quantitative method to discriminate between non-specific and specific lectin–glycan interactions on silicon-modified surfaces. J Colloid Interface Sci 2016; 464:198-205. [DOI: 10.1016/j.jcis.2015.11.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 11/07/2015] [Accepted: 11/10/2015] [Indexed: 01/13/2023]
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7
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Peng W, Rupich SM, Shafiq N, Gartstein YN, Malko AV, Chabal YJ. Silicon Surface Modification and Characterization for Emergent Photovoltaic Applications Based on Energy Transfer. Chem Rev 2015; 115:12764-96. [DOI: 10.1021/acs.chemrev.5b00085] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Weina Peng
- Department of Materials
Science and Engineering and ‡Department of Physics, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Sara M. Rupich
- Department of Materials
Science and Engineering and ‡Department of Physics, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Natis Shafiq
- Department of Materials
Science and Engineering and ‡Department of Physics, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Yuri N. Gartstein
- Department of Materials
Science and Engineering and ‡Department of Physics, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Anton V. Malko
- Department of Materials
Science and Engineering and ‡Department of Physics, University of Texas at Dallas, Richardson, Texas 75080, United States
| | - Yves J. Chabal
- Department of Materials
Science and Engineering and ‡Department of Physics, University of Texas at Dallas, Richardson, Texas 75080, United States
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8
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Khaldi K, Sam S, Gouget-Laemmel AC, Henry de Villeneuve C, Moraillon A, Ozanam F, Yang J, Kermad A, Ghellai N, Gabouze N. Active Acetylcholinesterase Immobilization on a Functionalized Silicon Surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:8421-8428. [PMID: 26153025 DOI: 10.1021/acs.langmuir.5b01928] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this work, we studied the attachment of active acetylcholinesterase (AChE) enzyme on a silicon substrate as a potential biomarker for the detection of organophosphorous (OP) pesticides. A multistep functionalization strategy was developed on a crystalline silicon surface: a carboxylic acid-terminated monolayer was grafted onto a hydrogen-terminated silicon surface by photochemical hydrosilylation, and then AChE was covalently attached through amide bonds using an activation EDC/NHS process. Each step of the modification was quantitatively characterized by ex-situ Fourier transform infrared spectroscopy in attenuated-total-reflection geometry (ATR-FTIR) and atomic force microscopy (AFM). The kinetics of enzyme immobilization was investigated using in situ real-time infrared spectroscopy. The enzymatic activity of immobilized acetylcholinesterase enzymes was determined with a colorimetric test. The surface concentration of active AChE was estimated to be Γ = 1.72 × 10(10) cm(-2).
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Affiliation(s)
- K Khaldi
- ‡Unité de Recherche Matériaux et Energies Renouvelables (URMER), Département de Physique, Faculté des Sciences, Université Abou Baker Belkaid, B.P. 119, 13000 Tlemcen, Algeria
| | | | - A C Gouget-Laemmel
- §Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France
| | - C Henry de Villeneuve
- §Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France
| | - A Moraillon
- §Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France
| | - F Ozanam
- §Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France
| | - J Yang
- §Physique de la Matière Condensée, Ecole Polytechnique-CNRS, 91128 Palaiseau, France
| | - A Kermad
- ‡Unité de Recherche Matériaux et Energies Renouvelables (URMER), Département de Physique, Faculté des Sciences, Université Abou Baker Belkaid, B.P. 119, 13000 Tlemcen, Algeria
| | - N Ghellai
- ‡Unité de Recherche Matériaux et Energies Renouvelables (URMER), Département de Physique, Faculté des Sciences, Université Abou Baker Belkaid, B.P. 119, 13000 Tlemcen, Algeria
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9
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Carbone M. Adsorption of 2-vinyl thiophene on Si(100)2 × 1: A van Der Waals corrected DFT study. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2015. [DOI: 10.1142/s021963361550011x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Oligo- and polythiophenes on surfaces play a fundamental role in building molecular circuits and organic-based electronics and may be assembled via interaction of the monomer units with the surface. In this framework, the nature of interaction of 2-vinyl thiophene (2VTP), a conjugated heteroaromatic monomer unit, with the Si (100) surface was studied by means of density functional theory (DFT). In particular, structural optimizations were performed comparing the effects of the inclusion of van der Waals (VdW) forces. It came out that the adsorption through the double bond is energetically favored, if VdW forces are included, whereas the adsorption through both aromatic ring and double bond simultaneously is more stable, if they are excluded. Physisorbed states were singled out and the barriers between two of them and the corresponding chemisorbed states were calculated along with the imaginary frequencies of the transition states. Also the transition energies have different values if the VdW forces are included.
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Affiliation(s)
- Marilena Carbone
- Department of Chemical Science and Technologies, University Tor Vergata, Via della Ricerca Scientifica, 100133 Roma, Italy
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10
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Carbone M. Adsorption of formic acid on Si(111)7 × 7 at room temperature: a valence band photoemission and Si2p photodesorption study. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5692] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Marilena Carbone
- Dipartimento di Scienze e Tecnologie Chimiche; Università Tor Vergata; Via della Ricerca Scientifica 1 00133 Roma Italia
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11
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Pérez-Lorenzo E, Zuzuarregui A, Arana S, Mujika M. Development of a biological protocol for endotoxin detection using quartz crystal microbalance (QCM). Appl Biochem Biotechnol 2014; 174:2492-503. [PMID: 25183316 DOI: 10.1007/s12010-014-1198-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Accepted: 08/22/2014] [Indexed: 11/26/2022]
Abstract
In this paper, a biological protocol for endotoxin detection has been developed and optimized by quartz crystal microbalance (QCM). The parameters involved in the formation of the self-assembled monolayer (SAM) have been analyzed, and a study of the pH of the ligand buffer has been performed in order to find the best condition for the ligand immobilization and, in consequence, for the endotoxin detection. The detection limit obtained with the characterized biological protocol corresponds to 1.90 μg/ml. The effectiveness of the optimized biological protocol has been analyzed by cyclic voltammetry analysis.
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Affiliation(s)
- E Pérez-Lorenzo
- CEIT-IK4 and Tecnun, University of Navarra, Paseo de Manuel Lardizábal 15, 20.018, Donostia-San Sebastián, Spain,
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12
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Herrera MU, Ichii T, Murase K, Sugimura H. Photochemical grafting of methyl groups on a Si(111) surface using a Grignard reagent. J Colloid Interface Sci 2013; 411:145-51. [DOI: 10.1016/j.jcis.2013.08.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2013] [Revised: 08/12/2013] [Accepted: 08/16/2013] [Indexed: 11/16/2022]
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13
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Collins G, O'Dwyer C, Morris M, Holmes JD. Palladium-catalyzed coupling reactions for the functionalization of Si surfaces: superior stability of alkenyl monolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:11950-11958. [PMID: 23968278 DOI: 10.1021/la402480f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Palladium-catalyzed Suzuki, Heck, and Sonogashira coupling reactions were studied as reaction protocols for organic modification of Si surfaces. These synthetically useful protocols allow for surface modification of alkene, alkyne, and halide terminated surfaces. Surface oxidation and metal contamination were assessed by X-ray photoelectron spectroscopy. The nature of the primary passivation layer was an important factor in the oxidation resistance of the Si surface during the secondary functionalization. Specifically, the use of alkynes as the primary functionalization layer gave superior stability compared to alkene analogues. The ability to utilize Pd-catalyzed coupling chemistries on Si surfaces opens great versatility for potential molecular and nanoscale electronics and sensing/biosensing applications.
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Affiliation(s)
- Gillian Collins
- Department of Chemistry and the Tyndall National Institute, University College Cork , Cork, Ireland
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14
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Liu L, Deng D, Xing Y, Li S, Yuan B, Chen J, Xia N. Activity analysis of the carbodiimide-mediated amine coupling reaction on self-assembled monolayers by cyclic voltammetry. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2012.11.049] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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15
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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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16
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Cretich M, Monroe MR, Reddington A, Zhang X, Daaboul GG, Damin F, Sola L, Unlu MS, Chiari M. Interferometric silicon biochips for label and label-free DNA and protein microarrays. Proteomics 2012; 12:2963-77. [PMID: 22930463 DOI: 10.1002/pmic.201200202] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 08/16/2012] [Accepted: 08/20/2012] [Indexed: 11/12/2022]
Abstract
Protein and DNA microarrays hold the promise to revolutionize the field of molecular diagnostics. Traditional microarray applications employ labeled detection strategies based on the use of fluorescent and chemiluminescent secondary antibodies. However, the development of high throughput, sensitive, label-free detection techniques is attracting attention as they do not require labeled reactants and provide quantitative information on binding kinetics. In this article, we will provide an overview of the recent author's work in label and label-free sensing platforms employing silicon/silicon oxide (Si/SiO(2)) substrates for interferometric and/or fluorescence detection of microarrays. The review will focus on applications of Si/SiO(2) with controlled oxide layers to (i) enhance the fluorescence intensity by optical interferences, (ii) quantify with sub-nanometer accuracy the axial locations of fluorophore-labeled probes tethered to the surface, and (iii) detect protein-protein interactions label free. Different methods of biofunctionalization of the sensing surface will be discussed. In particular, organosilanization reactions for monodimensional coatings and polymeric coatings will be extensively reviewed. Finally, the importance of calibration of protein microarrays through the dual use of labeled and label-free detection schemes on the same chip will be illustrated.
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Affiliation(s)
- Marina Cretich
- Consiglio Nazionale delle Ricerche, Istituto di Chimica del Riconoscimento Molecolare, Milano, Italy
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17
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Herrera MU, Ichii T, Murase K, Sugimura H. Photochemical Preparation of Methyl-terminated Si(111) Surface Using a Grignard Reagent. CHEM LETT 2012. [DOI: 10.1246/cl.2012.902] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Takashi Ichii
- Department of Materials Science and Engineering, Kyoto University
| | - Kuniaki Murase
- Department of Materials Science and Engineering, Kyoto University
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