151
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Strauss V, Margraf JT, Dirian K, Syrgiannis Z, Prato M, Wessendorf C, Hirsch A, Clark T, Guldi DM. Carbon Nanodots: Supramolecular Electron Donor-Acceptor Hybrids Featuring Perylenediimides. Angew Chem Int Ed Engl 2015; 54:8292-7. [DOI: 10.1002/anie.201502482] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2015] [Indexed: 12/26/2022]
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152
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Strauss V, Margraf JT, Dirian K, Syrgiannis Z, Prato M, Wessendorf C, Hirsch A, Clark T, Guldi DM. Kohlenstoff-Nanopunkte: supramolekulare Elektronendonor-Akzeptor-Hybride mit Perylendiimiden. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201502482] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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153
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154
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Mercante LA, Pavinatto A, Iwaki LEO, Scagion VP, Zucolotto V, Oliveira ON, Mattoso LHC, Correa DS. Electrospun polyamide 6/poly(allylamine hydrochloride) nanofibers functionalized with carbon nanotubes for electrochemical detection of dopamine. ACS APPLIED MATERIALS & INTERFACES 2015; 7:4784-90. [PMID: 25644325 DOI: 10.1021/am508709c] [Citation(s) in RCA: 109] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The use of nanomaterials as an electroactive medium has improved the performance of bio/chemical sensors, particularly when synergy is reached upon combining distinct materials. In this paper, we report on a novel architecture comprising electrospun polyamide 6/poly(allylamine hydrochloride) (PA6/PAH) nanofibers functionalized with multiwalled carbon nanotubes, used to detect the neurotransmitter dopamine (DA). Miscibility of PA6 and PAH was sufficient to form a single phase material, as indicated by thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC), leading to nanofibers with no beads onto which the nanotubes could adsorb strongly. Differential pulse voltammetry was employed with indium tin oxide (ITO) electrodes coated with the functionalized nanofibers for the selective electrochemical detection of dopamine (DA), with no interference from uric acid (UA) and ascorbic acid (AA) that are normally present in biological fluids. The response was linear for a DA concentration range from 1 to 70 μmol L(-1), with detection limit of 0.15 μmol L(-1) (S/N = 3). The concepts behind the novel architecture to modify electrodes can be potentially harnessed in other electrochemical sensors and biosensors.
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Affiliation(s)
- Luiza A Mercante
- National Laboratory for Nanotechnology in Agribusiness (LNNA), Embrapa Instrumentation , 13560-970 São Carlos, São Paulo, Brazil
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155
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Kakoti A, Siddiqui MF, Goswami P. A low cost design and fabrication method for developing a leak proof paper based microfluidic device with customized test zone. BIOMICROFLUIDICS 2015; 9:026502. [PMID: 25945146 PMCID: PMC4401808 DOI: 10.1063/1.4918641] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2015] [Accepted: 04/08/2015] [Indexed: 06/04/2023]
Abstract
This article describes a fabrication process for the generation of a leak proof paper based microfluidic device and a new design strategy for convenient incorporation of externally prepared test zones. Briefly, a negative photolithographic method was used to prepare the device with a partial photoresist layer on the rear of the device to block the leakage of sample. Microscopy and Field Emission Scanning Electron Microscopy data validated the formation of the photoresist layer. The partial layer of photoresist on the device channel limits sample volume to 7 ± 0.2 μl as compared to devices without the partial photoresist layer which requires a larger sample volume of 10 ± 0.1 μl. The design prototype with a customized external test zone exploits the channel protrusions on the UV exposed photoresist treated paper to bridge the externally applied test zone to the sample and absorbent zones. The partially laminated device with an external test zone has a comparatively low wicking speed of 1.8 ± 0.9 mm/min compared to the completely laminated device with an inbuilt test zone (3.3 ± 1.2 mm/min) which extends the reaction time between the analyte and reagents. The efficacy of the prepared device was studied with colorimetric assays for the non-specific detection of protein by tetrabromophenol blue, acid/base with phenolphthalein indicator, and specific detection of proteins using the HRP-DAB chemistry. The prepared device has the potential for leak proof detection of analyte, requires low sample volume, involves reduced cost of production (∼$0.03, excluding reagent and lamination cost), and enables the integration of customized test zones.
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Affiliation(s)
- Ankana Kakoti
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati , Guwahati 781039, Assam, India
| | - Mohd Farhan Siddiqui
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati , Guwahati 781039, Assam, India
| | - Pranab Goswami
- Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati , Guwahati 781039, Assam, India
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156
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Yin ZZ, Li L, Zhou SM, Cao H, Ren SB, Chen GZ. Novel cetyltrimethylammonium bromide-functionalized bucky gel nanocomposite for enhancing the electrochemistry of haemoglobin. J Solid State Electrochem 2015. [DOI: 10.1007/s10008-015-2769-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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157
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Functionalization and defunctionalization of single walled carbon nanotubes: Electrochemical and morphologic consequences. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2014.11.028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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158
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D’Souza OJ, Mascarenhas RJ, Thomas T, Basavaraja BM, Saxena AK, Mukhopadhyay K, Roy D. Platinum decorated multi-walled carbon nanotubes/Triton X-100 modified carbon paste electrode for the sensitive amperometric determination of Paracetamol. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2014.12.012] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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159
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Gong S, Zhu ZH. Giant piezoresistivity in aligned carbon nanotube nanocomposite: account for nanotube structural distortion at crossed tunnel junctions. NANOSCALE 2015; 7:1339-1348. [PMID: 25492244 DOI: 10.1039/c4nr05656f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
High piezoresistivity is critical for multifunctional carbon nanotube polymer composites with sensing capability. By developing a new percolation network model, this work reveals theoretically that a giant piezoresistivity in the composites can be potentially achieved by controlled nanotube alignment resulting from field based alignment techniques. The tube-tube and/or tube-matrix interaction in conjunction with the aligned carbon nanotube networks are fully considered in the newly proposed model. The structural distortion of nanotubes is determined self-consistently by minimizing the pseudo-potential energy at crossed-tube junctions based on the Lennard-Jones potential and simulation of coarse grain molecular dynamics. The tunneling transport through crossed-tube junctions is calculated by the Landauer-Büttiker formula with empirical fitting by first-principle calculation. The simulation results also reveal that the piezoresistivity can be further improved by using low carbon nanotube loadings near the percolation threshold, carbon nanotubes with a small aspect ratio, high intrinsic conductivity and polymers with a small Poisson's ratio. This giant piezoresistive effect offers a tremendously promising future, which needs further thorough exploration.
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Affiliation(s)
- S Gong
- Department of Earth and Space Science and Engineering, York University, 4700 Keele Street, Toronto, ON M3J 1P3, Canada.
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160
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Majzlíková P, Sedláček J, Prášek J, Pekárek J, Svatoš V, Bannov AG, Jašek O, Synek P, Eliáš M, Zajíčková L, Hubálek J. Sensing properties of multiwalled carbon nanotubes grown in MW plasma torch: electronic and electrochemical behavior, gas sensing, field emission, IR absorption. SENSORS 2015; 15:2644-61. [PMID: 25629702 PMCID: PMC4367325 DOI: 10.3390/s150202644] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Accepted: 01/16/2015] [Indexed: 01/30/2023]
Abstract
Vertically aligned multi-walled carbon nanotubes (VA-MWCNTs) with an average diameter below 80 nm and a thickness of the uniform VA-MWCNT layer of about 16 μm were grown in microwave plasma torch and tested for selected functional properties. IR absorption important for a construction of bolometers was studied by Fourier transform infrared spectroscopy. Basic electrochemical characterization was performed by cyclic voltammetry. Comparing the obtained results with the standard or MWCNT‐modified screen-printed electrodes, the prepared VA-MWCNT electrodes indicated their high potential for the construction of electrochemical sensors. Resistive CNT gas sensor revealed a good sensitivity to ammonia taking into account room temperature operation. Field emission detected from CNTs was suitable for the pressure sensing application based on the measurement of emission current in the diode structure with bending diaphragm. The advantages of microwave plasma torch growth of CNTs, i.e., fast processing and versatility of the process, can be therefore fully exploited for the integration of surface-bound grown CNTs into various sensing structures.
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Affiliation(s)
- Petra Majzlíková
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| | - Jiří Sedláček
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| | - Jan Prášek
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| | - Jan Pekárek
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| | - Vojtěch Svatoš
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
| | - Alexander G Bannov
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
| | - Ondřej Jašek
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
| | - Petr Synek
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
| | - Marek Eliáš
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
| | - Lenka Zajíčková
- Central European Institute of Technology, Masaryk University, Kamenice 5, CZ‑62500 Brno, Czech Republic.
| | - Jaromír Hubálek
- Central European Institute of Technology, Brno University of Technology, Technická 3058/10, CZ‑61600 Brno, Czech Republic.
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161
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Yang H, Liang W, He N, Deng Y, Li Z. Chemiluminescent labels released from long spacer arm-functionalized magnetic particles: a novel strategy for ultrasensitive and highly selective detection of pathogen infections. ACS APPLIED MATERIALS & INTERFACES 2015; 7:774-781. [PMID: 25553360 DOI: 10.1021/am507203s] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Previously, the unique advantages provided by chemiluminescence (CL) and magnetic particles (MPs) have resulted in the development of many useful nucleic acid detection methods. CL is highly sensitive, but when applied to MPs, its intensity is limited by the inner filter-like effect arising from excess dark MPs. Herein, we describe a modified strategy whereby CL labels are released from MPs to eliminate this negative effect. This approach relies on (1) the magnetic capture of target molecules on long spacer arm-functionalized magnetic particles (LSA-MPs), (2) the conjugation of streptavidin-alkaline phosphatase (SA-AP) to biotinylated amplicons of target pathogens, (3) the release of CL labels (specifically, AP tags), and (4) the detection of the released labels. CL labels were released from LSA-MPs through LSA ultrasonication or DNA enzymolysis, which proved to be the superior method. In contrast to conventional MPs, LSA-MPs exhibited significantly improved CL detection, because of the introduction of LSA, which was made of water-soluble carboxymethylated β-1,3-glucan. Detection of hepatitis B virus with this technique revealed a low detection limit of 50 fM, high selectivity, and excellent reproducibility. Thus, this approach may hold great potential for early stage clinical diagnosis of infectious diseases.
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Affiliation(s)
- Haowen Yang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University , Nanjing 210096, China
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162
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Sharma VK, Jelen F, Trnkova L. Functionalized solid electrodes for electrochemical biosensing of purine nucleobases and their analogues: a review. SENSORS (BASEL, SWITZERLAND) 2015; 15:1564-600. [PMID: 25594595 PMCID: PMC4327092 DOI: 10.3390/s150101564] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/27/2014] [Accepted: 01/04/2015] [Indexed: 12/14/2022]
Abstract
Interest in electrochemical analysis of purine nucleobases and few other important purine derivatives has been growing rapidly. Over the period of the past decade, the design of electrochemical biosensors has been focused on achieving high sensitivity and efficiency. The range of existing electrochemical methods with carbon electrode displays the highest rate in the development of biosensors. Moreover, modification of electrode surfaces based on nanomaterials is frequently used due to their extraordinary conductivity and surface to volume ratio. Different strategies for modifying electrode surfaces facilitate electron transport between the electrode surface and biomolecules, including DNA, oligonucleotides and their components. This review aims to summarize recent developments in the electrochemical analysis of purine derivatives, as well as discuss different applications.
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Affiliation(s)
- Vimal Kumar Sharma
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, CZ-625 00 Brno, Czech Republic.
| | - Frantisek Jelen
- Institute of Biophysics of the Academy of Sciences of the Czech Republic, V.V.I., Kralovopolska 135, CZ-612 65 Brno, Czech Republic.
| | - Libuse Trnkova
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, CZ-625 00 Brno, Czech Republic.
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163
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Gupta P, Rosy R, Goyal RN. A carbon ion beam irradiated MWCNT/AuNPs composite sensor for a sensitive assay of purine-nucleosides of DNA. RSC Adv 2015. [DOI: 10.1039/c5ra18970e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Sensor for purine nucleosides has been developed using irradiation with high energy carbon ion beam.
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Affiliation(s)
- Pankaj Gupta
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Rosy Rosy
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
| | - Rajendra N. Goyal
- Department of Chemistry
- Indian Institute of Technology Roorkee
- Roorkee-247667
- India
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164
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Hazra S, Joshi H, Ghosh BK, Ahmed A, Gibson T, Millner P, Ghosh NN. Development of a novel and efficient H2O2 sensor by simple modification of a screen printed Au electrode with Ru nanoparticle loaded functionalized mesoporous SBA15. RSC Adv 2015. [DOI: 10.1039/c5ra02712h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
A novel and efficient electrochemical sensor has been developed to quantitatively measure H2O2 concentration by cyclic voltammetry.
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Affiliation(s)
- Subhenjit Hazra
- Nano-Materials Lab
- Department of Chemistry
- Birla Institute of Technology and Science
- Pilani K. K. Birla Goa Campus
- Zuarinagar
| | - Hrishikesh Joshi
- Nano-Materials Lab
- Department of Chemistry
- Birla Institute of Technology and Science
- Pilani K. K. Birla Goa Campus
- Zuarinagar
| | - Barun Kumar Ghosh
- Nano-Materials Lab
- Department of Chemistry
- Birla Institute of Technology and Science
- Pilani K. K. Birla Goa Campus
- Zuarinagar
| | - Asif Ahmed
- School of Biomedical Sciences
- Faculty of Biological Sciences
- University of Leeds
- Leeds
- UK
| | - Timothy Gibson
- School of Biomedical Sciences
- Faculty of Biological Sciences
- University of Leeds
- Leeds
- UK
| | - Paul Millner
- School of Biomedical Sciences
- Faculty of Biological Sciences
- University of Leeds
- Leeds
- UK
| | - Narendra Nath Ghosh
- Nano-Materials Lab
- Department of Chemistry
- Birla Institute of Technology and Science
- Pilani K. K. Birla Goa Campus
- Zuarinagar
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165
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Amplified electrochemical detection of protein kinase activity based on gold nanoparticles/multi-walled carbon nanotubes nanohybrids. Talanta 2014; 129:328-35. [DOI: 10.1016/j.talanta.2014.05.043] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 05/05/2014] [Accepted: 05/07/2014] [Indexed: 11/19/2022]
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166
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Primo EN, Oviedo MB, Sánchez CG, Rubianes MD, Rivas GA. Bioelectrochemical sensing of promethazine with bamboo-type multiwalled carbon nanotubes dispersed in calf-thymus double stranded DNA. Bioelectrochemistry 2014; 99:8-16. [DOI: 10.1016/j.bioelechem.2014.05.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2014] [Revised: 05/03/2014] [Accepted: 05/20/2014] [Indexed: 01/18/2023]
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167
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Eguílaz M, Ferreyra NF, Rivas GA. Dispersions of Hollow and Bamboo-Like Multiwalled Carbon Nanotubes in Polyethyleneimine: Critical Analysis of the Preparation Conditions and Applications for Electrochemical Sensing. ELECTROANAL 2014. [DOI: 10.1002/elan.201400298] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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168
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Zhang A, Tian Y, Liu M, Xiao Y, Jia D, Li F. Enhanced performances of nonenzymatic glucose sensors by attaching Au nanoparticles onto the surfaces of Cu2O@Cu nanocable arrays. RSC Adv 2014. [DOI: 10.1039/c4ra07270g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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169
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Ionic liquid functionalized graphene based immunosensor for sensitive detection of carbohydrate antigen 15-3 integrated with Cd2+-functionalized nanoporous TiO2 as labels. Biosens Bioelectron 2014; 59:75-80. [DOI: 10.1016/j.bios.2014.03.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 03/02/2014] [Accepted: 03/03/2014] [Indexed: 01/08/2023]
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170
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Teo WZ, Pumera M. Direct Voltammetric Determination of Redox-Active Iron in Carbon Nanotubes. Chemphyschem 2014; 15:3819-23. [DOI: 10.1002/cphc.201402384] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Revised: 07/25/2014] [Indexed: 01/02/2023]
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171
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Ma H, Yao L, Li P, Ablikim O, Cheng Y, Zhang M. Highly Sensitive and Selective Fluorometric/Electrochemical Dual-Channel Sensors for TNT and DNT Explosives. Chemistry 2014; 20:11655-8. [DOI: 10.1002/chem.201402206] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2014] [Indexed: 11/09/2022]
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172
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Rao W, Cai R, Yin Y, Long F, Zhang Z. Magnetic dummy molecularly imprinted polymers based on multi-walled carbon nanotubes for rapid selective solid-phase extraction of 4-nonylphenol in aqueous samples. Talanta 2014; 128:170-6. [PMID: 25059145 DOI: 10.1016/j.talanta.2014.04.087] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2014] [Revised: 04/22/2014] [Accepted: 04/29/2014] [Indexed: 11/25/2022]
Abstract
In this paper, a highly selective sample clean-up procedure combining magnetic dummy molecular imprinting with solid-phase extraction was developed for rapid separation and determination of 4-nonylphenol (NP) in the environmental water samples. The magnetic dummy molecularly imprinted polymers (mag-DMIPs) based on multi-walled carbon nanotubes were successfully synthesized with a surface molecular imprinting technique using 4-tert-octylphenol as the dummy template and tetraethylorthosilicate as the cross-linker. The maximum adsorption capacity of the mag-DMIPs for NP was 52.4 mg g(-1) and it took about 20 min to achieve the adsorption equilibrium. The mag-DMIPs exhibited the specific selective adsorption toward NP. Coupled with high performance liquid chromatography analysis, the mag-DMIPs were used to extract solid-phase and detect NP in real water samples successfully with the recoveries of 88.6-98.1%.
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Affiliation(s)
- Wei Rao
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Rong Cai
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Yuli Yin
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Fang Long
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China
| | - Zhaohui Zhang
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China; State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China.
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173
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Yuan L, Liu S, Tu W, Zhang Z, Bao J, Dai Z. Biomimetic Superoxide Dismutase Stabilized by Photopolymerization for Superoxide Anions Biosensing and Cell Monitoring. Anal Chem 2014; 86:4783-90. [DOI: 10.1021/ac403920q] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Ling Yuan
- Jiangsu Key Laboratory of
Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Suli Liu
- Jiangsu Key Laboratory of
Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Wenwen Tu
- Jiangsu Key Laboratory of
Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Zengsong Zhang
- Jiangsu Key Laboratory of
Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Jianchun Bao
- Jiangsu Key Laboratory of
Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China
| | - Zhihui Dai
- Jiangsu Key Laboratory of
Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China
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174
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Pujol L, Evrard D, Groenen-Serrano K, Freyssinier M, Ruffien-Cizsak A, Gros P. Electrochemical sensors and devices for heavy metals assay in water: the French groups' contribution. Front Chem 2014; 2:19. [PMID: 24818124 PMCID: PMC4012207 DOI: 10.3389/fchem.2014.00019] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Accepted: 04/01/2014] [Indexed: 11/15/2022] Open
Abstract
A great challenge in the area of heavy metal trace detection is the development of electrochemical techniques and devices which are user-friendly, robust, selective, with low detection limits and allowing fast analyses. This review presents the major contribution of the French scientific academic community in the field of electrochemical sensors and electroanalytical methods within the last 20 years. From the well-known polarography to the up-to-date generation of functionalized interfaces, the different strategies dedicated to analytical performances improvement are exposed: stripping voltammetry, solid mercury-free electrode, ion selective sensor, carbon based materials, chemically modified electrodes, nano-structured surfaces. The paper particularly emphasizes their advantages and limits face to the last Water Frame Directive devoted to the Environmental Quality Standards for heavy metals. Recent trends on trace metal speciation as well as on automatic "on line" monitoring devices are also evoked.
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Affiliation(s)
- Luca Pujol
- Université de Toulouse, UPS, INPT, Laboratoire de Génie ChimiqueToulouse, France
- CNRS, Laboratoire de Génie ChimiqueToulouse, France
- EltaBlagnac, France
| | - David Evrard
- Université de Toulouse, UPS, INPT, Laboratoire de Génie ChimiqueToulouse, France
- CNRS, Laboratoire de Génie ChimiqueToulouse, France
| | - Karine Groenen-Serrano
- Université de Toulouse, UPS, INPT, Laboratoire de Génie ChimiqueToulouse, France
- CNRS, Laboratoire de Génie ChimiqueToulouse, France
| | | | | | - Pierre Gros
- Université de Toulouse, UPS, INPT, Laboratoire de Génie ChimiqueToulouse, France
- CNRS, Laboratoire de Génie ChimiqueToulouse, France
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175
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Chen Z, Tang C, Zeng Y, Liu H, Yin Z, Li L. Determination of Bisphenol A Using an Electrochemical Sensor Based on a Molecularly Imprinted Polymer-Modified Multiwalled Carbon Nanotube Paste Electrode. ANAL LETT 2014. [DOI: 10.1080/00032719.2013.862624] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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176
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Wang F, Lu CH, Willner I. From cascaded catalytic nucleic acids to enzyme-DNA nanostructures: controlling reactivity, sensing, logic operations, and assembly of complex structures. Chem Rev 2014; 114:2881-941. [PMID: 24576227 DOI: 10.1021/cr400354z] [Citation(s) in RCA: 494] [Impact Index Per Article: 49.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Fuan Wang
- Institute of Chemistry, The Center for Nanoscience and Nanotechnology, The Hebrew University of Jerusalem , Jerusalem 91904, Israel
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177
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Balasubramanian K, Kern K. 25th anniversary article: label-free electrical biodetection using carbon nanostructures. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:1154-75. [PMID: 24452968 DOI: 10.1002/adma.201304912] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Revised: 10/25/2013] [Indexed: 05/07/2023]
Abstract
Nanostructures are promising candidates for use as active materials for the detection of chemical and biological species, mainly due to the high surface-to-volume ratio and the unique physical properties arising at the nanoscale. Among the various nanostructures, materials comprised of sp(2) -carbon enjoy a unique position due to the possibility to readily prepare them in various dimensions ranging from 0D, through 1D to 2D. This review focuses on the use of 1D (carbon nanotubes) and 2D (graphene) carbon nanostructures for the detection of biologically relevant molecules. A key advantage is the possibility to perform the sensing operation without the use of any labels or complex reaction schemes. Along this spirit, various strategies reported for the label-free electrical detection of biomolecules using carbon nanostructures are discussed. With their promise for ultimate sensitivity and the capability to attain high selectivity through controlled chemical functionalization, carbon-based nanobiosensors are expected to open avenues to novel diagnostic tools as well as to obtain new fundamental insight into biomolecular interactions down to the single molecule level.
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Affiliation(s)
- Kannan Balasubramanian
- Max Planck Institute for Solid State Research, Heisenbergstrasse 1, D70569, Stuttgart, Germany
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178
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da Silva H, Pacheco JG, MCS Magalhães J, Viswanathan S, Delerue-Matos C. MIP-graphene-modified glassy carbon electrode for the determination of trimethoprim. Biosens Bioelectron 2014; 52:56-61. [DOI: 10.1016/j.bios.2013.08.035] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Revised: 07/29/2013] [Accepted: 08/06/2013] [Indexed: 10/26/2022]
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179
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Roenbeck MR, Wei X, Beese AM, Naraghi M, Furmanchuk A, Paci JT, Schatz GC, Espinosa HD. In situ scanning electron microscope peeling to quantify surface energy between multiwalled carbon nanotubes and graphene. ACS NANO 2014; 8:124-138. [PMID: 24341540 DOI: 10.1021/nn402485n] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Understanding atomic interactions between constituents is critical to the design of high-performance nanocomposites. Here, we report an experimental-computational approach to investigate the adhesion energy between as-produced arc discharge multiwalled carbon nanotubes (MWCNTs) and graphene. An in situ scanning electron microscope (SEM) experiment is used to peel MWCNTs from graphene grown on copper foils. The force during peeling is obtained by monitoring the deflection of a cantilever. Finite element and molecular mechanics simulations are performed to assist the data analysis and interpretation of the results. A finite element analysis of the experimental configuration is employed to confirm the applicability of Kendall's peeling model to obtain the adhesion energy. Molecular mechanics simulations are used to estimate the effective contact width at the MWCNT-graphene interface. The measured surface energy is γ = 0.20 ± 0.09 J·m(-2) or γ = 0.36 ± 0.16 J·m(-2), depending on the assumed conformation of the tube cross section during peeling. The scatter in the data is believed to result from an amorphous carbon coating on the MWCNTs, observed using transmission electron microscopy (TEM), and the surface roughness of graphene as characterized by atomic force microscopy (AFM).
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Affiliation(s)
- Michael R Roenbeck
- Department of Mechanical Engineering, and ‡Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208-3111, United States
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180
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Maiti UN, Lee WJ, Lee JM, Oh Y, Kim JY, Kim JE, Shim J, Han TH, Kim SO. 25th anniversary article: Chemically modified/doped carbon nanotubes & graphene for optimized nanostructures & nanodevices. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2014; 26:40-66. [PMID: 24123343 DOI: 10.1002/adma.201303265] [Citation(s) in RCA: 231] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2013] [Indexed: 05/25/2023]
Abstract
Outstanding pristine properties of carbon nanotubes and graphene have limited the scope for real-life applications without precise controllability of the material structures and properties. This invited article to celebrate the 25th anniversary of Advanced Materials reviews the current research status in the chemical modification/doping of carbon nanotubes and graphene and their relevant applications with optimized structures and properties. A broad aspect of specific correlations between chemical modification/doping schemes of the graphitic carbons with their novel tunable material properties is summarized. An overview of the practical benefits from chemical modification/doping, including the controllability of electronic energy level, charge carrier density, surface energy and surface reactivity for diverse advanced applications is presented, namely flexible electronics/optoelectronics, energy conversion/storage, nanocomposites, and environmental remediation, with a particular emphasis on their optimized interfacial structures and properties. Future research direction is also proposed to surpass existing technological bottlenecks and realize idealized graphitic carbon applications.
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Affiliation(s)
- Uday Narayan Maiti
- Center for Nanomaterials and Chemical Reactions Institute for Basic Science, (IBS), Department of Materials Science & Engineering, KAIST, Daejeon, 305-701, Republic of Korea
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181
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Govindhan M, Adhikari BR, Chen A. Nanomaterials-based electrochemical detection of chemical contaminants. RSC Adv 2014. [DOI: 10.1039/c4ra10399h] [Citation(s) in RCA: 114] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Recent advances in the development of nanomaterials-based electrochemical sensors for environmental monitoring and food safety applications are assessed.
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Affiliation(s)
| | | | - Aicheng Chen
- Department of Chemistry
- Lakehead University
- Thunder Bay, Canada
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182
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Vizuete M, Gómez-Escalonilla MJ, Fierro JLG, Ohkubo K, Fukuzumi S, Yudasaka M, Iijima S, Nierengarten JF, Langa F. Photoinduced electron transfer in a carbon nanohorn–C60 conjugate. Chem Sci 2014. [DOI: 10.1039/c3sc53342e] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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183
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Liu Y, Zhao X, Cai B, Pei T, Tong Y, Tang Q, Liu Y. Controllable fabrication of oriented micro/nanowire arrays of dibenzo-tetrathiafulvalene by a multiple drop-casting method. NANOSCALE 2014; 6:1323-1328. [PMID: 24352138 DOI: 10.1039/c3nr05680e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A multiple drop-casting method of growing the ultralong dibenzo-tetrathiafulvalene (DB-TTF) micro/nanowire arrays has been developed which has the success ratio as high as 94%. This method enables the arrays with a length over a few hundreds of micrometers to locate between droplets with the definite orientation. The width of the micro/nanowires is controlled via tuning the concentration of DB-TTF solution in dichloromethane. The large-scale arrays can be grown onto Si, SiO₂, glass, and the flexible polyethylene terephthalate (PET) substrates. These results show the promising potential of this facile solution-based process for the growth of the high-quality organic micro/nanowires, the fabrication of high-performance and flexible devices, and the fabrication of controlled assemblies of nanoscale circuits for fundamental studies and future applications.
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Affiliation(s)
- Yan Liu
- Key Laboratory of UV Light Emitting Materials and Technology under Ministry of Education, Northeast Normal University, Changchun 130024, P. R. China.
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184
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Primo E, Gutierrez F, Luque G, Dalmasso P, Gasnier A, Jalit Y, Moreno M, Bracamonte M, Rubio ME, Pedano M, Rodríguez M, Ferreyra N, Rubianes M, Bollo S, Rivas G. Comparative study of the electrochemical behavior and analytical applications of (bio)sensing platforms based on the use of multi-walled carbon nanotubes dispersed in different polymers. Anal Chim Acta 2013; 805:19-35. [DOI: 10.1016/j.aca.2013.10.039] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Revised: 09/29/2013] [Accepted: 10/21/2013] [Indexed: 01/06/2023]
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185
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Kruss S, Hilmer AJ, Zhang J, Reuel NF, Mu B, Strano MS. Carbon nanotubes as optical biomedical sensors. Adv Drug Deliv Rev 2013; 65:1933-50. [PMID: 23906934 DOI: 10.1016/j.addr.2013.07.015] [Citation(s) in RCA: 204] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2013] [Revised: 07/16/2013] [Accepted: 07/18/2013] [Indexed: 01/11/2023]
Abstract
Biosensors are important tools in biomedical research. Moreover, they are becoming an essential part of modern healthcare. In the future, biosensor development will become even more crucial due to the demand for personalized-medicine, point-of care devices and cheaper diagnostic tools. Substantial advances in sensor technology are often fueled by the advent of new materials. Therefore, nanomaterials have motivated a large body of research and such materials have been implemented into biosensor devices. Among these new materials carbon nanotubes (CNTs) are especially promising building blocks for biosensors due to their unique electronic and optical properties. Carbon nanotubes are rolled-up cylinders of carbon monolayers (graphene). They can be chemically modified in such a way that biologically relevant molecules can be detected with high sensitivity and selectivity. In this review article we will discuss how carbon nanotubes can be used to create biosensors. We review the latest advancements of optical carbon nanotube based biosensors with a special focus on near-infrared (NIR)-fluorescence, Raman-scattering and fluorescence quenching.
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Affiliation(s)
- Sebastian Kruss
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, United States
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186
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Woolley J, Stanicka J, Cotter T. Recent advances in reactive oxygen species measurement in biological systems. Trends Biochem Sci 2013; 38:556-65. [DOI: 10.1016/j.tibs.2013.08.009] [Citation(s) in RCA: 133] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Revised: 08/27/2013] [Accepted: 08/28/2013] [Indexed: 01/18/2023]
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187
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188
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Probing the surface chemistry of different oxidized MWCNT for the improved electrical wiring of cytochrome c nitrite reductase. Electrochem commun 2013. [DOI: 10.1016/j.elecom.2013.07.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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189
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Canevari TC, Raymundo-Pereira PA, Landers R, Machado SAS. Direct Synthesis of Ag Nanoparticles Incorporated on a Mesoporous Hybrid Material as a Sensitive Sensor for the Simultaneous Determination of Dihydroxybenzenes Isomers. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300879] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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190
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Tong Y, Li H, Guan H, Zhao J, Majeed S, Anjum S, Liang F, Xu G. Electrochemical cholesterol sensor based on carbon nanotube@molecularly imprinted polymer modified ceramic carbon electrode. Biosens Bioelectron 2013; 47:553-8. [DOI: 10.1016/j.bios.2013.03.072] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 03/19/2013] [Accepted: 03/28/2013] [Indexed: 10/27/2022]
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191
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Song Q, Li M, Huang L, Wu Q, Zhou Y, Wang Y. Bifunctional polydopamine@Fe3O4 core–shell nanoparticles for electrochemical determination of lead(II) and cadmium(II). Anal Chim Acta 2013; 787:64-70. [DOI: 10.1016/j.aca.2013.06.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2013] [Revised: 06/02/2013] [Accepted: 06/12/2013] [Indexed: 12/01/2022]
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192
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Pham XH, Bui MPN, Li CA, Han KN, Irfan M, Hong MH, Seong GH. Hydrazine detection by shape-controlled palladium nanostructures on carbon nanotube thin films. BIOCHIP JOURNAL 2013. [DOI: 10.1007/s13206-013-7209-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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193
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Abstract
The low or lack of solubility of fullerenes, carbon nanotubes and graphene/graphite in organic solvents and water severely hampers the study of their chemical functionalizations and practical applications. Covalent and noncovalent functionalizations of fullerenes and related materials via mechanochemistry seem appealing to tackle these problems. In this review article, we provide a comprehensive coverage on the mechanochemical reactions of fullerenes, carbon nanotubes and graphite, including dimerizations and trimerizations, nucleophilic additions, 1,3-dipolar cycloadditions, Diels-Alder reactions, [2 + 1] cycloadditions of carbenes and nitrenes, radical additions, oxidations, etc. It is intriguing to find that some reactions of fullerenes can only proceed under solvent-free conditions or undergo different reaction pathways from those of the liquid-phase counterparts to generate completely different products. We also present the application of the mechanical milling technique to complex formation, nanocomposite formation and enhanced hydrogen storage of carbon-related materials.
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Affiliation(s)
- San-E Zhu
- Hefei National Laboratory for Physical Sciences at Microscale, CAS Key Laboratory of Soft Matter Chemistry, and Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, P. R. China.
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194
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Guldi DM, Costa RD. Nanocarbon Hybrids: The Paradigm of Nanoscale Self-Ordering/Self-Assembling by Means of Charge Transfer/Doping Interactions. J Phys Chem Lett 2013; 4:1489-1501. [PMID: 26282304 DOI: 10.1021/jz4001714] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The scope of this Perspective is to highlight the potential of nanoscale self-ordering/self-assembling nanocarbons-fullerenes, single-wall carbon nanotubes, and graphene-en route toward novel charge transfer hybrids that unify several functions such as light harvesting, charge separation, and, eventually, catalysis. All of the given examples are fully characterized by a broad range of spectroscopic as well as microscopic techniques and, as such, document the success in tuning the electronic structure of functional nanocarbons by means of charge transfer/doping interactions.
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Affiliation(s)
- Dirk M Guldi
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Egerlandstrasse 3, 91058, Erlangen, Germany
| | - Rubén D Costa
- Department of Chemistry and Pharmacy, Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universitaet Erlangen-Nuernberg, Egerlandstrasse 3, 91058, Erlangen, Germany
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195
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Yameen B, Zydziak N, Weidner SM, Bruns M, Barner-Kowollik C. Conducting Polymer/SWCNTs Modular Hybrid Materials via Diels–Alder Ligation. Macromolecules 2013. [DOI: 10.1021/ma4004055] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Basit Yameen
- Preparative Macromolecular Chemistry,
Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse
18, 76128 Karlsruhe, Germany
| | - Nicolas Zydziak
- Preparative Macromolecular Chemistry,
Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse
18, 76128 Karlsruhe, Germany
- Polymer Engineering, Fraunhofer Institut für Chemische Technologie (ICT), Josef-von-Fraunhoferstrasse
7, 76327 Pfinztal (Berghausen), Germany
| | - Steffen M. Weidner
- BAM-Federal Institute for Materials Research and Testing, Richard-Willstätter-Straße
11, 12489 Berlin, Germany
| | - Michael Bruns
- Institute for Applied Materials
(IAM) and Karlsruhe Nano Micro Facility (KNMF), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz
1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Christopher Barner-Kowollik
- Preparative Macromolecular Chemistry,
Institut für Technische Chemie und Polymerchemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse
18, 76128 Karlsruhe, Germany
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196
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Gutierrez F, Rubianes MD, Rivas GA. Adsorption and Electrooxidation of DNA at Glassy Carbon Electrodes Modified with Multiwall Carbon Nanotubes Dispersed in Glucose Oxidase. ELECTROANAL 2013. [DOI: 10.1002/elan.201200559] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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197
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Dispersion of bamboo type multi-wall carbon nanotubes in calf-thymus double stranded DNA. Colloids Surf B Biointerfaces 2013; 108:329-36. [PMID: 23563301 DOI: 10.1016/j.colsurfb.2013.02.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Revised: 02/16/2013] [Accepted: 02/18/2013] [Indexed: 11/23/2022]
Abstract
We report for the first time the use of double stranded calf-thymus DNA (dsDNA) to successfully disperse bamboo-like multi-walled carbon nanotubes (bCNT). The dispersion and the modified electrodes were studied by different spectroscopic, microscopic and electrochemical techniques. The drastic treatment for dispersing the bCNT (45min sonication in a 50% (v/v) ethanol:water solution), produces a partial denaturation and a decrease in the length of dsDNA that facilitates the dispersion of CNT and makes possible an efficient electron transfer of guanine residues to the electrode. A critical analysis of the influence of different experimental conditions on the efficiency of the dispersion and on the performance of glassy carbon electrodes (GCE) modified with bCNT-dsDNA dispersion is also reported. The electron transfer of redox probes and guanine residues was more efficient at GCE modified with bCNT dispersed in dsDNA than at GCE modified with hollow CNT (hCNT) dispersed in dsDNA, demonstrating the importance of the presence of bCNT.
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198
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Warnick KH, Wang B, Cliffel DE, Wright DW, Haglund RF, Pantelides ST. Room-temperature reactions for self-cleaning molecular nanosensors. NANO LETTERS 2013; 13:798-802. [PMID: 23320817 DOI: 10.1021/nl304598p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
New sensing techniques for detecting molecules, especially self-cleaning sensors, are in demand. Here we describe a room-temperature process in which a nanostructured substrate catalyzes the reaction of a target molecule with atmospheric oxygen and the reaction energy is absorbed by the substrate, where it can in principle be detected. Specifically, we report first-principles calculations describing a reaction between 2,4-dinitrotoluene (DNT) and atmospheric O(2) catalyzed by Fe-porphyrin at room temperature, incorporating an oxygen into the methyl group of DNT and releasing 1.9 eV per reaction. The atomic oxygen left on the Fe site can be removed by reacting with another DNT molecule, restoring the Fe catalyst.
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Affiliation(s)
- Keith H Warnick
- Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235, USA.
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199
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Zhang X, Ji J, Zhang X, Yang B, Liu M, Liu W, Tao L, Chen Y, Wei Y. Mussel inspired modification of carbon nanotubes using RAFT derived stimuli-responsive polymers. RSC Adv 2013. [DOI: 10.1039/c3ra44277b] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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200
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Guo Z, Seol ML, Kim MS, Ahn JH, Choi YK, Liu JH, Huang XJ. Sensitive and selective electrochemical detection of dopamine using an electrode modified with carboxylated carbonaceous spheres. Analyst 2013; 138:2683-90. [DOI: 10.1039/c3an36669c] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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