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Yang B, Gordiyenko K, Schäfer A, Dadfar SMM, Yang W, Riehemann K, Kumar R, Niemeyer CM, Hirtz M. Fluorescence Imaging Study of Film Coating Structure and Composition Effects on DNA Hybridization. ADVANCED NANOBIOMED RESEARCH 2023. [DOI: 10.1002/anbr.202200133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Affiliation(s)
- Bingquan Yang
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMFi) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Klavdiya Gordiyenko
- Institute of Biological Interfaces (IBG-1) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Andreas Schäfer
- nanoAnalytics GmbH Heisenbergstraße 11 48149 Münster Germany
| | - Seyed Mohammad Mahdi Dadfar
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMFi) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Wenwu Yang
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMFi) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Kristina Riehemann
- Physical Institute and Center for Nanotechnology (CeNTech) University of Münster Wilhelm-Klemm-Straße 10 48149 Münster Germany
| | - Ravi Kumar
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMFi) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Christof M. Niemeyer
- Institute of Biological Interfaces (IBG-1) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Michael Hirtz
- Institute of Nanotechnology (INT) and Karlsruhe Nano Micro Facility (KNMFi) Karlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
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Peng K, Zhang N, Chen P, Zhang L, Jiang Z, Zhong Z. Manipulations of light by ordered micro-holes in silicon substrates. OPTICS EXPRESS 2020; 28:16151-16162. [PMID: 32549443 DOI: 10.1364/oe.391243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 05/06/2020] [Indexed: 06/11/2023]
Abstract
Ordered micro-holes with controllable period, diameter and depth are fabricated in Si (001) substrates via a feasible approach based on nanosphere lithography. They dramatically reduce the reflectance in a broad wavelength range of 400-1000 nm, which can be deliberately modulated by tailoring their geometrical parameters. The simulated reflectance via finite-difference time-domain (FDTD) method agrees well with the experimental data. The FDTD simulations also demonstrate substantially enhanced light absorption of a Si thin film with ordered micro-holes. Particularly, the light-filled distributions around micro-holes disclose fundamental features of two types of modes, channel modes and guided modes, involving the wavelength-dependence, the origin, the dominant location region and the interference pattern of the light field around micro-holes. Our results not only provide insights into the antireflection and the substantially enhanced absorption of light by ordered micro-holes, but also open a door to optimizing micro-hole arrays with desired light field distributions for innovative device applications.
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Tieu T, Alba M, Elnathan R, Cifuentes‐Rius A, Voelcker NH. Advances in Porous Silicon–Based Nanomaterials for Diagnostic and Therapeutic Applications. ADVANCED THERAPEUTICS 2018. [DOI: 10.1002/adtp.201800095] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Terence Tieu
- Monash Institute of Pharmaceutical Sciences Monash University Parkville Campus, 381 Royal Parade Parkville Victoria 3052 Australia
- T. Tieu, Dr. M. Alba, Prof. N. H. Voelcker CSIRO Manufacturing Bayview Avenue Clayton Victoria 3168 Australia
| | - Maria Alba
- Monash Institute of Pharmaceutical Sciences Monash University Parkville Campus, 381 Royal Parade Parkville Victoria 3052 Australia
- T. Tieu, Dr. M. Alba, Prof. N. H. Voelcker CSIRO Manufacturing Bayview Avenue Clayton Victoria 3168 Australia
| | - Roey Elnathan
- Monash Institute of Pharmaceutical Sciences Monash University Parkville Campus, 381 Royal Parade Parkville Victoria 3052 Australia
| | - Anna Cifuentes‐Rius
- Monash Institute of Pharmaceutical Sciences Monash University Parkville Campus, 381 Royal Parade Parkville Victoria 3052 Australia
| | - Nicolas H. Voelcker
- Monash Institute of Pharmaceutical Sciences Monash University Parkville Campus, 381 Royal Parade Parkville Victoria 3052 Australia
- Prof. N. H. Voelcker Melbourne Centre for Nanofabrication Victorian Node of the Australian National Fabrication Facility 151 Wellington Road Clayton Victoria 3168 Australia
- T. Tieu, Dr. M. Alba, Prof. N. H. Voelcker CSIRO Manufacturing Bayview Avenue Clayton Victoria 3168 Australia
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Reta N, Saint CP, Michelmore A, Prieto-Simon B, Voelcker NH. Nanostructured Electrochemical Biosensors for Label-Free Detection of Water- and Food-Borne Pathogens. ACS APPLIED MATERIALS & INTERFACES 2018; 10:6055-6072. [PMID: 29369608 DOI: 10.1021/acsami.7b13943] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The emergence of nanostructured materials has opened new horizons in the development of next generation biosensors. Being able to control the design of the electrode interface at the nanoscale combined with the intrinsic characteristics of the nanomaterials engenders novel biosensing platforms with improved capabilities. The purpose of this review is to provide a comprehensive and critical overview of the latest trends in emerging nanostructured electrochemical biosensors. A detailed description and discussion of recent approaches to construct label-free electrochemical nanostructured electrodes is given with special focus on pathogen detection for environmental monitoring and food safety. This includes the use of nanoscale materials such as nanotubes, nanowires, nanoparticles, and nanosheets as well as porous nanostructured materials including nanoporous anodic alumina, mesoporous silica, porous silicon, and polystyrene nanochannels. These platforms may pave the way toward the development of point-of-care portable electronic devices for applications ranging from environmental analysis to biomedical diagnostics.
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Affiliation(s)
| | | | | | - Beatriz Prieto-Simon
- Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
| | - Nicolas H Voelcker
- Monash Institute of Pharmaceutical Sciences, Monash University , Parkville, Victoria 3052, Australia
- Victorian Node of the Australian National Fabrication Facility, Melbourne Centre for Nanofabrication , Clayton, Victoria 3168, Australia
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Majoul N, Rasson J, Francis LA, Aouida S, Bessaïs B. Immobilization of hydroxocobalamin (vitamin B12) on aptes-functionalized mesoporous silicon. Biomed Phys Eng Express 2017. [DOI: 10.1088/2057-1976/aa84c1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Ensafi A, Hedayati P, Abarghoui MM, Rezaei B. Bismuth Nanoparticles@Porous Silicon Nanostructure, Application as a Selective and Sensitive Electrochemical Sensor for the Determination of Thioridazine. ELECTROANAL 2017. [DOI: 10.1002/elan.201700291] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Aliasghar Ensafi
- Department of Chemistry; Isfahan University of Technology; Isfahan 84156-83111 Iran, Fax: +98-311-3912350 Tel.: +98-311-3912351
| | - Pardis Hedayati
- Department of Chemistry; Isfahan University of Technology; Isfahan 84156-83111 Iran, Fax: +98-311-3912350 Tel.: +98-311-3912351
| | - Mehdi Mokhtari Abarghoui
- Department of Chemistry; Isfahan University of Technology; Isfahan 84156-83111 Iran, Fax: +98-311-3912350 Tel.: +98-311-3912351
| | - Behzad Rezaei
- Department of Chemistry; Isfahan University of Technology; Isfahan 84156-83111 Iran, Fax: +98-311-3912350 Tel.: +98-311-3912351
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Medina-Sánchez M, Ibarlucea B, Pérez N, Karnaushenko DD, Weiz SM, Baraban L, Cuniberti G, Schmidt OG. High-Performance Three-Dimensional Tubular Nanomembrane Sensor for DNA Detection. NANO LETTERS 2016; 16:4288-96. [PMID: 27266478 DOI: 10.1021/acs.nanolett.6b01337] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
We report an ultrasensitive label-free DNA biosensor with fully on-chip integrated rolled-up nanomembrane electrodes. The hybridization of complementary DNA strands (avian influenza virus subtype H1N1) is selectively detected down to attomolar concentrations, an unprecedented level for miniaturized sensors without amplification. Impedimetric DNA detection with such a rolled-up biosensor shows 4 orders of magnitude sensitivity improvement over its planar counterpart. Furthermore, it is observed that the impedance response of the proposed device is contrary to the expected behavior due to its particular geometry. To further investigate this difference, a thorough model analysis of the measured signal and the electric field calculation is performed, revealing enhanced electron hopping/tunneling along the DNA chains due to an enriched electric field inside the tube. Likewise, conformational changes of DNA might also contribute to this effect. Accordingly, these highly integrated three-dimensional sensors provide a tool to study electrical properties of DNA under versatile experimental conditions and open a new avenue for novel biosensing applications (i.e., for protein, enzyme detection, or monitoring of cell behavior under in vivo like conditions).
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Affiliation(s)
- Mariana Medina-Sánchez
- Institute for Integrative Nanosciences, IFW Dresden , Helmholtzstraße 20, 01069 Dresden, Germany
| | - Bergoi Ibarlucea
- Institute of Materials Science and Max Bergmann Center for Biomaterials, Center for Advancing Electronics Dresden (CfAED), Dresden University of Technology , 01062 Dresden, Germany
| | - Nicolás Pérez
- Institute for Integrative Nanosciences, IFW Dresden , Helmholtzstraße 20, 01069 Dresden, Germany
| | - Dmitriy D Karnaushenko
- Institute for Integrative Nanosciences, IFW Dresden , Helmholtzstraße 20, 01069 Dresden, Germany
| | - Sonja M Weiz
- Institute for Integrative Nanosciences, IFW Dresden , Helmholtzstraße 20, 01069 Dresden, Germany
| | - Larysa Baraban
- Institute of Materials Science and Max Bergmann Center for Biomaterials, Center for Advancing Electronics Dresden (CfAED), Dresden University of Technology , 01062 Dresden, Germany
| | - Gianaurelio Cuniberti
- Institute of Materials Science and Max Bergmann Center for Biomaterials, Center for Advancing Electronics Dresden (CfAED), Dresden University of Technology , 01062 Dresden, Germany
| | - Oliver G Schmidt
- Institute for Integrative Nanosciences, IFW Dresden , Helmholtzstraße 20, 01069 Dresden, Germany
- Material Systems for Nanoelectronics, Chemnitz University of Technology , Reichenhainer Straße 70, 09107 Chemnitz, Germany
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8
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Reta N, Michelmore A, Saint C, Prieto-Simón B, Voelcker NH. Porous silicon membrane-modified electrodes for label-free voltammetric detection of MS2 bacteriophage. Biosens Bioelectron 2016; 80:47-53. [DOI: 10.1016/j.bios.2016.01.038] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 01/12/2016] [Accepted: 01/13/2016] [Indexed: 02/05/2023]
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9
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Singh V, Mondal PC, Kumar A, Jeyachandran YL, Awasthi SK, Gupta RD, Zharnikov M. Surface confined heteroleptic copper(II)-polypyridyl complexes for photonuclease activity. Chem Commun (Camb) 2015; 50:11484-7. [PMID: 25131185 DOI: 10.1039/c4cc05063k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Heteroleptic copper(II)-polypyridyl complexes with extended π-conjugated, aromatic terminal units were immobilized on glass/Si substrates to intercalate DNA and cleave it upon photoexposure. Photonuclease activity is shown to be high, well reproducible and non-destructible towards the assembled complexes.
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Affiliation(s)
- Vikram Singh
- Department of Chemistry, University of Delhi, Delhi-110 007, India
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A Label-Free Impedimetric DNA Sensor Based on a Nanoporous SnO₂ Film: Fabrication and Detection Performance. SENSORS 2015; 15:10686-704. [PMID: 25954951 PMCID: PMC4481975 DOI: 10.3390/s150510686] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Revised: 04/27/2015] [Accepted: 05/04/2015] [Indexed: 11/28/2022]
Abstract
Nanoporous SnO2 thin films were elaborated to serve as sensing electrodes for label-free DNA detection using electrochemical impedance spectroscopy (EIS). Films were deposited by an electrodeposition process (EDP). Then the non-Faradic EIS behaviour was thoroughly investigated during some different steps of functionalization up to DNA hybridization. The results have shown a systematic decrease of the impedance upon DNA hybridization. The impedance decrease is attributed to an enhanced penetration of ionic species within the film volume. Besides, the comparison of impedance variations upon DNA hybridization between the liquid and vapour phase processes for organosilane (APTES) grafting on the nanoporous SnO2 films showed that vapour-phase method is more efficient. This is due to the fact that the vapour is more effective than the solution in penetrating the nanopores of the films. As a result, the DNA sensors built from vapour-treated silane layer exhibit a higher sensitivity than those produced from liquid-treated silane, in the range of tested target DNA concentration going to 10 nM. Finally, the impedance and fluorescence response signals strongly depend on the types of target DNA molecules, demonstrating a high selectivity of the process on nanoporous SnO2 films.
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11
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Le MH, Fradetal L, Delabouglise D, Mai AT, Stambouli V. Fluorescence and Label Free Impedimetric DNA Detection on SnO2Nanopillars. ELECTROANAL 2015. [DOI: 10.1002/elan.201400595] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Cheng H, Zheng H, Wu JX, Xu W, Zhou L, Leong KC, Fitzgerald E, Rajagopalan R, Too HP, Choi WK. Photo-attachment of biomolecules for miniaturization on wicking Si-nanowire platform. PLoS One 2015; 10:e0116539. [PMID: 25689680 PMCID: PMC4331555 DOI: 10.1371/journal.pone.0116539] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 12/10/2014] [Indexed: 12/03/2022] Open
Abstract
We demonstrated the surface functionalization of a highly three-dimensional, superhydrophilic wicking substrate using light to immobilize functional biomolecules for sensor or microarray applications. We showed here that the three-dimensional substrate was compatible with photo-attachment and the performance of functionalization was greatly improved due to both increased surface capacity and reduced substrate reflectivity. In addition, photo-attachment circumvents the problems induced by wicking effect that was typically encountered on superhydrophilic three-dimensional substrates, thus reducing the difficulty of producing miniaturized sites on such substrate. We have investigated various aspects of photo-attachment process on the nanowire substrate, including the role of different buffers, the effect of wavelength as well as how changing probe structure may affect the functionalization process. We demonstrated that substrate fabrication and functionalization can be achieved with processes compatible with microelectronics processes, hence reducing the cost of array fabrication. Such functionalization method coupled with the high capacity surface makes the substrate an ideal candidate for sensor or microarray for sensitive detection of target analytes.
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Affiliation(s)
- He Cheng
- Advanced Materials for Micro- and Nano- Systems, Singapore-MIT Alliance, Singapore, Singapore
| | - Han Zheng
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, Singapore
| | - Jia Xin Wu
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
| | - Wei Xu
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, Singapore
| | - Lihan Zhou
- Bioprocessing Technology Institute, 20 Biopolis Way, #06-01 Centros, Singapore, Singapore
| | - Kam Chew Leong
- GLOBALFOUNDRIES Singapore Private Limited, Singapore, Singapore
| | - Eugene Fitzgerald
- Advanced Materials for Micro- and Nano- Systems, Singapore-MIT Alliance, Singapore, Singapore
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States of America
| | - Raj Rajagopalan
- Skolkovo Institute of Science and Technology, Moscow, The Russian Federation
| | - Heng Phon Too
- Bioprocessing Technology Institute, 20 Biopolis Way, #06-01 Centros, Singapore, Singapore
- Department of Biochemistry, National University of Singapore, Singapore, Singapore
| | - Wee Kiong Choi
- Advanced Materials for Micro- and Nano- Systems, Singapore-MIT Alliance, Singapore, Singapore
- Department of Electrical and Computer Engineering, National University of Singapore, Singapore, Singapore
- NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore, Singapore
- * E-mail:
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Brodoceanu D, Elnathan R, Prieto-Simón B, Delalat B, Guinan T, Kroner E, Voelcker NH, Kraus T. Dense arrays of uniform submicron pores in silicon and their applications. ACS APPLIED MATERIALS & INTERFACES 2015; 7:1160-1169. [PMID: 25493543 DOI: 10.1021/am506891d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We report a versatile particle-based route to dense arrays of parallel submicron pores with high aspect ratio in silicon and explore the application of these arrays in sensors, optics, and polymer micropatterning. Polystyrene (PS) spheres are convectively assembled on gold-coated silicon wafers and sputter-etched, resulting in well-defined gold disc arrays with excellent long-range order. The gold discs act as catalysts in metal-assisted chemical etching, yielding uniform pores with straight walls, flat bottoms, and high aspect ratio. The resulting pore arrays can be used as robust antireflective surfaces, in biosensing applications, and as templates for polymer replica molding.
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Affiliation(s)
- Daniel Brodoceanu
- INM-Leibniz Institute for New Materials , Campus D2 2, 66123, Saarbrücken, Germany
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Otano J, Bui MPN, Seo SS. Determination of DNA Hybridization on Gold Nanoparticle Conjugated Polystyrene Particle Thin Film Using Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy. ANAL LETT 2013. [DOI: 10.1080/00032719.2013.831429] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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15
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A sensitive DNA biosensor based on a facile sulfamide coupling reaction for capture probe immobilization. Anal Chim Acta 2013; 788:158-64. [PMID: 23845495 DOI: 10.1016/j.aca.2013.06.018] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Revised: 06/05/2013] [Accepted: 06/17/2013] [Indexed: 01/30/2023]
Abstract
A novel DNA biosensor was fabricated through a facile sulfamide coupling reaction. First, the versatile sulfonic dye molecule of 1-amino-2-naphthol-4-sulfonate (AN-SO3(-)) was electrodeposited on the surface of a glassy carbon electrode (GCE) to form a steady and ordered AN-SO3(-) layer. Then the amino-terminated capture probe was covalently grafted to the surface of SO3(-)-AN deposited GCE through the sulfamide coupling reaction between the amino groups in the probe DNA and the sulfonic groups in the AN-SO3(-). The step-by-step modification process was characterized by electrochemistry and attenuated total reflectance Fourier transform infrared (ATR-FTIR) spectroscopy. Using Ru(NH3)6(3+) as probe, the probe density and the hybridization efficiency of the biosensor were determined to be 3.18×10(13) strands cm(-2) and 86.5%, respectively. The hybridization performance of the biosensor was examined by differential pulse voltammetry using Co(phen)3(3+/2+) (phen=1,10-phenanthroline) as the indicator. The selectivity experiments showed that the biosensor presented distinguishable response after hybridization with the three-base mismatched, non-complementary and complementary sequences. Under the optimal conditions, the oxidation peak currents of Co(phen)3(3+/2+) increased linearly with the logarithm values of the concentration of the complementary sequences in the range from 1.0×10(-13)M to 1.0×10(-8)M with a regression coefficient of 0.9961. The detection limit was estimated to be 7.2×10(-14)M based on 3σ.
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Porous silicon biosensor: Current status. Biosens Bioelectron 2013; 41:54-64. [DOI: 10.1016/j.bios.2012.09.045] [Citation(s) in RCA: 151] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 09/13/2012] [Accepted: 09/22/2012] [Indexed: 01/10/2023]
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17
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Xiao W, Huang J. Immobilization of oligonucleotides onto zirconia-modified filter paper and specific molecular recognition. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:12284-12288. [PMID: 21905718 DOI: 10.1021/la203150f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A morphologically complex cellulosic substance (e.g., commercial filter paper) was employed as a substrate for DNA immobilization and successive recognition. A uniform ultrathin zirconia gel film was first deposited on each cellulose nanofiber in bulk filter paper by a facile sol-gel process. Relying on the large surface area of filter paper and the strong affinity of zirconia for the phosphate group, terminal-phosphate probe DNA was abundantly immobilized on the zirconia-modified filter paper so as to convert the composite to a biofunctional material for the sensitive and repetitive recognition of the corresponding complementary target DNA on the nanomolar level. By contrast, in spite of the viability of the immobilization of the probe DNA and the recognition of target DNA on the quartz plate, the amount of captured probe DNA or recognized target DNA on such a flat substrate was much less than that captured or recognized on filter paper, resulting in a relatively insensitive recognition event. Moreover, control experiments on bare filter paper (without a zirconia nanocoating) suggested that the zirconia gel film was essential to probe DNA immobilization and subsequent target DNA recognition.
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Affiliation(s)
- Wei Xiao
- Department of Chemistry, Zhejiang University, Hangzhou, Zhejiang 310027, China
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18
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Choi S, Goryll M, Sin LYM, Wong PK, Chae J. Microfluidic-based biosensors toward point-of-care detection of nucleic acids and proteins. MICROFLUIDICS AND NANOFLUIDICS 2011; 10:231-247. [PMID: 32214951 PMCID: PMC7087901 DOI: 10.1007/s10404-010-0638-8] [Citation(s) in RCA: 132] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Accepted: 04/26/2010] [Indexed: 05/14/2023]
Abstract
This article reviews state-of-the-art microfluidic biosensors of nucleic acids and proteins for point-of-care (POC) diagnostics. Microfluidics is capable of analyzing small sample volumes (10-9-10-18 l) and minimizing costly reagent consumption as well as automating sample preparation and reducing processing time. The merger of microfluidics and advanced biosensor technologies offers new promises for POC diagnostics, including high-throughput analysis, portability and disposability. However, this merger also imposes technological challenges on biosensors, such as high sensitivity and selectivity requirements with sample volumes orders of magnitude smaller than those of conventional practices, false response errors due to non-specific adsorption, and integrability with other necessary modules. There have been many prior review articles on microfluidic-based biosensors, and this review focuses on the recent progress in last 5 years. Herein, we review general technologies of DNA and protein biosensors. Then, recent advances on the coupling of the biosensors to microfluidics are highlighted. Finally, we discuss the key challenges and potential solutions for transforming microfluidic biosensors into POC diagnostic applications.
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Affiliation(s)
- Seokheun Choi
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287 USA
| | - Michael Goryll
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287 USA
| | - Lai Yi Mandy Sin
- Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, AZ 85721 USA
| | - Pak Kin Wong
- Department of Aerospace and Mechanical Engineering, University of Arizona, Tucson, AZ 85721 USA
| | - Junseok Chae
- School of Electrical, Computer and Energy Engineering, Arizona State University, Tempe, AZ 85287 USA
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Bonanni A, del Valle M. Use of nanomaterials for impedimetric DNA sensors: A review. Anal Chim Acta 2010; 678:7-17. [DOI: 10.1016/j.aca.2010.08.022] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2010] [Revised: 08/12/2010] [Accepted: 08/17/2010] [Indexed: 01/31/2023]
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Abstract
The detection of mismatched base pairs in DNA plays a crucial role in the diagnosis of genetic-related diseases and conditions, especially for early stage treatment. Among the various biosensors that have been used for DNA detection, EC sensors show great promise because they are capable of precise DNA recognition and efficient signal transduction. Advancements in micro- and nanotechnologies, specifically fabrication techniques and new nanomaterials, have enabled for the development of highly sensitive, highly specific sensors making them attractive for the detection of small sequence variations. Furthermore, the integration of sensors with sample preparation and fluidic processes enables for rapid, multiplexed DNA detection essential for POC clinical diagnostics.
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Affiliation(s)
- Fang Wei
- Mechanical and Aerospace Engineering Department, School of Engineering and Applied Science, University of California, Los Angeles, California 90095, USA
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Betty C, Lal R, Yakhmi J. Impedance model of electrolyte–insulator–semiconductor structure with porous silicon semiconductor. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2009.01.071] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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