301
|
Zou J, Martin AD, Zdyrko B, Luzinov I, Raston CL, Iyer KS. Pd-induced ordering of 2D Pt nanoarrays on phosphonated calix[4]arenes stabilised graphenes. Chem Commun (Camb) 2011; 47:5193-5. [DOI: 10.1039/c1cc10408j] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
302
|
Chen Y, Lee YD, Vedala H, Allen BL, Star A. Exploring the chemical sensitivity of a carbon nanotube/green tea composite. ACS NANO 2010; 4:6854-62. [PMID: 21043457 PMCID: PMC3026703 DOI: 10.1021/nn100988t] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Single-walled carbon nanotubes (SWNTs) possess unique electronic and physical properties, which make them very attractive for a wide range of applications. In particular, SWNTs and their composites have shown a great potential for chemical and biological sensing. Green tea, or more specifically its main antioxidant component, epigallocatechin gallate (EGCG), has been found to disperse SWNTs in water. However, the chemical sensitivity of this SWNT/green tea (SWNT/EGCG) composite remained unexplored. With EGCG present, this SWNT composite should have strong antioxidant properties and thus respond to reactive oxygen species (ROS). Here we report on fabrication and characterization of SWNT/EGCG thin films and the measurement of their relative conductance as a function of H(2)O(2) concentrations. We further investigated the sensing mechanism by Fourier transform infrared (FTIR) spectroscopy and field-effect transistor measurements (FET). We propose here that the response to H(2)O(2) arises from the oxidation of EGCG in the composite. These findings suggest that SWNT/green tea composite has a great potential for developing simple resistivity-based sensors.
Collapse
Affiliation(s)
| | | | | | | | - Alexander Star
- Department of Chemistry, University of Pittsburgh and the National Energy Technology Laboratory, Pittsburgh, PA 15260 (USA), Fax: (+1) 412-624-4027
| |
Collapse
|
303
|
Heller I, Chatoor S, Männik J, Zevenbergen MAG, Dekker C, Lemay SG. Influence of Electrolyte Composition on Liquid-Gated Carbon Nanotube and Graphene Transistors. J Am Chem Soc 2010; 132:17149-56. [DOI: 10.1021/ja104850n] [Citation(s) in RCA: 145] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Iddo Heller
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - Sohail Chatoor
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - Jaan Männik
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - Marcel A. G. Zevenbergen
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - Cees Dekker
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | - Serge G. Lemay
- Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| |
Collapse
|
304
|
Tang D, Tang J, Su B, Chen G. Ultrasensitive electrochemical immunoassay of staphylococcal enterotoxin B in food using enzyme-nanosilica-doped carbon nanotubes for signal amplification. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2010; 58:10824-10830. [PMID: 20873791 DOI: 10.1021/jf102326m] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A new sandwich-type electrochemical immunoassay for ultrasensitive detection of staphylococcal enterotoxin B (SEB) in food was developed using horseradish peroxidase-nanosilica-doped multiwalled carbon nanotubes (HRPSiCNTs) for signal amplification. Rabbit polyclonal anti-SEB antibodies immobilized on the screen-printed carbon electrode (SPCE) and covalently bound to the HRPSiCNTs were used as capture antibodies and detection antibodies, respectively. In the presence of SEB analyte, the sandwich-type immunocomplex could be formed between the immobilized anti-SEB on the SPCE and anti-SEB-labeled HRPSiCNTs, and the carried HRP could catalyze the electrochemical reduction of H2O2 with the help of thionine. The high content of HRP in the HRPSiCNTs could greatly amplify the electrochemical signal. Under optimal conditions, the reduction current increased with the increase of SEB in the sample, and exhibited a dynamic range of 0.05-15 ng/mL with a low detection limit (LOD) of 10 pg/mL SEB (at 3σ). Intra- and interassay coefficients of variation were below 10%. In addition, the assay was evaluated with SEB spiked samples including watermelon juice, soymilk, apple juice, and pork food, receiving excellent correlation with results from commercially available enzyme-linked immunosorbent assay (ELISA).
Collapse
Affiliation(s)
- Dianping Tang
- Key Laboratory of Analysis and Detection for Food Safety (Ministry of Education and Fujian Province), Department of Chemistry, Fuzhou University, Fuzhou 350108, China
| | | | | | | |
Collapse
|
305
|
Kwon OS, Park E, Kweon OY, Park SJ, Jang J. Novel flexible chemical gas sensor based on poly(3,4-ethylenedioxythiophene) nanotube membrane. Talanta 2010; 82:1338-43. [DOI: 10.1016/j.talanta.2010.06.058] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Revised: 06/26/2010] [Accepted: 06/28/2010] [Indexed: 11/16/2022]
|
306
|
Di W, Shirahata N, Zeng H, Sakka Y. Fluorescent sensing of colloidal CePO4:Tb nanorods for rapid, ultrasensitive and selective detection of vitamin C. NANOTECHNOLOGY 2010; 21:365501. [PMID: 20699487 DOI: 10.1088/0957-4484/21/36/365501] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Vitamin C is an essential biological molecule for living organisms. The detection of vitamin C is always required due to its wide use in chemical, biological and pharmaceutical engineering. Here, we established a novel sensing system for rapid, ultrasensitive and highly selective detection of vitamin C based on a 'turn-on' fluorescent method. The turn-on fluorescent sensing system was built up of a colloidal CePO(4):Tb nanocrystalline solution with its fluorescence quenched by KMnO(4). The addition of vitamin C leads to a linear increase of fluorescence. The sensing principle of nanocrystalline CePO(4):Tb is based on a redox reaction via simply modulating the surface chemistry of nanocrystals. Our present sensing system for vitamin C exhibits a rapid response rate of less than 2 min, and highly selective and ultrasensitive detection with a detection limit of 108 nM, which is two orders of magnitude lower than that acquired by previously reported methods. The repeated reversibility of fluorescence quenching/recovery with time revealed a high reproducibility and long-term stability of our sensing materials. Furthermore, our developed sensing material overcomes the disadvantages such as complex surface modification/immobilization and serious biotoxicity compared to quantum-dot-based fluorescent sensing systems.
Collapse
Affiliation(s)
- Weihua Di
- World Premier International Research (WPI) Center Initiative on Materials Nanoarchitronics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan.
| | | | | | | |
Collapse
|
307
|
Chen H, Tang J, Su B, Chen G, Huang J, Tang D. Nanogold-actuated biomimetic peroxidase for sensitized electrochemical immunoassay of carcinoembryonic antigen in human serum. Anal Chim Acta 2010; 678:169-75. [DOI: 10.1016/j.aca.2010.09.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2010] [Revised: 09/01/2010] [Accepted: 09/03/2010] [Indexed: 01/05/2023]
|
308
|
Washe AP, Macho S, Crespo GA, Rius FX. Potentiometric Online Detection of Aromatic Hydrocarbons in Aqueous Phase Using Carbon Nanotube-Based Sensors. Anal Chem 2010; 82:8106-12. [DOI: 10.1021/ac101146k] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alemayehu P. Washe
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Santiago Macho
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - Gastón A. Crespo
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| | - F. Xavier Rius
- Department of Analytical and Organic Chemistry, Universitat Rovira i Virgili, 43007 Tarragona, Spain
| |
Collapse
|
309
|
Tricoli A, Righettoni M, Teleki A. Halbleitergassensoren: Trockensynthese und Anwendung. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.200903801] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
310
|
Nanostructured materials in potentiometry. Anal Bioanal Chem 2010; 399:171-81. [DOI: 10.1007/s00216-010-3974-3] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2010] [Revised: 06/23/2010] [Accepted: 06/28/2010] [Indexed: 10/19/2022]
|
311
|
Weizmann Y, Lim J, Chenoweth DM, Swager TM. Regiospecific synthesis of Au-nanorod/SWCNT/Au-nanorod heterojunctions. NANO LETTERS 2010; 10:2466-2469. [PMID: 20507084 PMCID: PMC2912407 DOI: 10.1021/nl1008025] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The synthesis of precisely defined nanoscale hybrid materials remains a challenge at the frontier of chemistry and material science. In particular, the assembly of diverse high-aspect ratio one-dimensional materials such as gold nanorods and carbon nanotubes into functional systems is of ever increasing interest due to their electronic and sensing applications. To meet these challenges, methods for interfacing gold nanorods with carbon materials such as single-walled carbon nanotubes (SWCNTs) in a regio-controlled manner are needed. Herein, we report a method for the regiospecific synthesis of terminally linked gold nanorod-SWCNTs based on a nanotube surface protection strategy. The key to our approach is a SWCNT surface protection procedure allowing for selective functionalization of the SWCNT termini.
Collapse
|
312
|
Fang Y, Guo S, Zhu C, Dong S, Wang E. One-Dimensional Carbon Nanotube/SnO2/Noble Metal Nanoparticle Hybrid Nanostructure: Synthesis, Characterization, and Electrochemical Sensing. Chem Asian J 2010; 5:1838-45. [DOI: 10.1002/asia.201000004] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
313
|
Han KN, Li CA, Han B, Bui MPN, Pham XH, Choo J, Bachman M, Li GP, Seong GH. Electrochemical patterning of transparent single-walled carbon nanotube films on plastic substrates. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:9136-9141. [PMID: 20235587 DOI: 10.1021/la904642k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
We report a new patterning method for single-walled carbon nanotubes (SWCNTs) films on flexible, transparent poly(ethylene terephthalate) using electrochemical etching in an aqueous electrolyte solution. Electrochemical etching of the SWCNT films patterned with photoresist polymer was accomplished in a three-electrode system, and the electrochemically patterned SWCNT films were then characterized by scanning electron microscopy (SEM) and Raman spectroscopy. The voltammetry curve showed that SWCNTs underwent drastic oxidation above an applied potential of 1.315 V with the generation of gas bubbles, and the oxidation current became constant above 2.6 V due to the mass transfer limit. SEM images showed that the networks of SWCNTs in the area protected with the photoresist polymer had no damage and vivid connections were obvious, while the connections and shapes of SWCNTs in the area exposed to electrochemical etching were indistinct and slightly damaged. In the Raman spectra of the area protected with the photoresist polymer and the exposed SWCNT area, the intensity ratio of the D-line to the G-line increased from 0.077 to 1.136, which indicated that the ordered carbons of the SWCNT film gradually became amorphous carbons due to electrochemical etching. For optimal patterning, the electrochemical etchings of SWCNT films were performed under various conditions (the applied potential, pH of the electrolyte solution, and electrolyte concentration). An applied potential of 3.0 V in 0.1 M NaCl electrolyte solution (pH 7.0) was optimal for homogeneous electrochemical patterning of SWCNT films. In an electrochemiluminescence reaction, the SWCNT films patterned by this technique could be used successfully as flexible and transparent electrodes.
Collapse
Affiliation(s)
- Kwi Nam Han
- Department of Bionano Engineering, Hanyang University, Ansan 426-791, South Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
314
|
Mattmann M, Roman C, Helbling T, Bechstein D, Durrer L, Pohle R, Fleischer M, Hierold C. Pulsed gate sweep strategies for hysteresis reduction in carbon nanotube transistors for low concentration NO(2) gas detection. NANOTECHNOLOGY 2010; 21:185501. [PMID: 20388980 DOI: 10.1088/0957-4484/21/18/185501] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Carbon-nanotube-based field effect transistors (CNFETs) have been employed as highly sensitive chemical sensors. Often used as the sensor output signal, the gate threshold voltage (V(th)) is subject to concentration-dependent shifts upon exposure to target analytes. However, an unambiguous determination of the intrinsic V(th) is usually hampered by substantial hysteresis in CNFET gate characteristics. In this study we show that short gate voltage (V(gd)) pulses can be used for hysteresis reduction in CNFETs as chemical sensors, in particular for NO(2) detection. In the pulsed operation regime, even small shifts of V(th) upon sub-ppm NO(2) exposure remain resolvable. Furthermore, the hysteretic behaviour is systematically investigated by varying the pulse waveforms and timing parameters. Finally, we use an adapted hysteresis model for pulsed V(gd) and employ it to discuss the measurement data.
Collapse
Affiliation(s)
- M Mattmann
- Micro and Nanosystems, Department of Mechanical and Process Engineering, ETH Zurich, CH-8092 Zurich, Switzerland.
| | | | | | | | | | | | | | | |
Collapse
|
315
|
Liu S, Shen Q, Cao Y, Gan L, Wang Z, Steigerwald ML, Guo X. Chemical functionalization of single-walled carbon nanotube field-effect transistors as switches and sensors. Coord Chem Rev 2010. [DOI: 10.1016/j.ccr.2009.11.007] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
316
|
Clavaguera S, Carella A, Caillier L, Celle C, Pécaut J, Lenfant S, Vuillaume D, Simonato JP. Sub-ppm Detection of Nerve Agents Using Chemically Functionalized Silicon Nanoribbon Field-Effect Transistors. Angew Chem Int Ed Engl 2010; 49:4063-6. [DOI: 10.1002/anie.201000122] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
317
|
Clavaguera S, Carella A, Caillier L, Celle C, Pécaut J, Lenfant S, Vuillaume D, Simonato JP. Sub-ppm Detection of Nerve Agents Using Chemically Functionalized Silicon Nanoribbon Field-Effect Transistors. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201000122] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
318
|
Hahn U, Engmann S, Oelsner C, Ehli C, Guldi DM, Torres T. Immobilizing Water-Soluble Dendritic Electron Donors and Electron Acceptors—Phthalocyanines and Perylenediimides—onto Single Wall Carbon Nanotubes. J Am Chem Soc 2010; 132:6392-401. [DOI: 10.1021/ja100065h] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Uwe Hahn
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and the Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Sarah Engmann
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and the Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Christian Oelsner
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and the Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Christian Ehli
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and the Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Dirk M. Guldi
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and the Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| | - Tomas Torres
- Departamento de Química Orgánica, Universidad Autónoma de Madrid, 28049 Madrid, Spain, and the Department of Chemistry and Pharmacy and Interdisciplinary Center for Molecular Materials (ICMM), Friedrich-Alexander-Universität Erlangen-Nürnberg, Egerlandstrasse 3, 91058 Erlangen, Germany
| |
Collapse
|
319
|
Perez MS, Lerner B, Resasco DE, Pareja Obregon PD, Julian PM, Mandolesi PS, Buffa FA, Boselli A, Lamagna A. Carbon nanotube integration with a CMOS process. SENSORS (BASEL, SWITZERLAND) 2010; 10:3857-3867. [PMID: 22319330 PMCID: PMC3274251 DOI: 10.3390/s100403857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/27/2010] [Revised: 04/06/2010] [Accepted: 04/09/2010] [Indexed: 05/31/2023]
Abstract
This work shows the integration of a sensor based on carbon nanotubes using CMOS technology. A chip sensor (CS) was designed and manufactured using a 0.30 μm CMOS process, leaving a free window on the passivation layer that allowed the deposition of SWCNTs over the electrodes. We successfully investigated with the CS the effect of humidity and temperature on the electrical transport properties of SWCNTs. The possibility of a large scale integration of SWCNTs with CMOS process opens a new route in the design of more efficient, low cost sensors with high reproducibility in their manufacture.
Collapse
Affiliation(s)
- Maximiliano S. Perez
- Grupo MEMS, Comision Nacional de Energia Atomica, San Martin 1650, Buenos Aires, Argentina; E-Mails: (M.S.P.); (A.B.); (A.L.)
| | - Betiana Lerner
- Grupo MEMS, Comision Nacional de Energia Atomica, San Martin 1650, Buenos Aires, Argentina; E-Mails: (M.S.P.); (A.B.); (A.L.)
| | - Daniel E. Resasco
- School of Chemical, Biological and Materials Engineering, University of Oklahoma, Norman, OK 73019, USA; E-Mail:
| | - Pablo D. Pareja Obregon
- Departamento de Ingenieria Electrica y de Computadoras, Universidad Nacional del Sur, Bahia Blanca B8000FTN, Argentina; E-Mails: (P.D.P.O.); (P.M.J.); (P.S.M.)
| | - Pedro M. Julian
- Departamento de Ingenieria Electrica y de Computadoras, Universidad Nacional del Sur, Bahia Blanca B8000FTN, Argentina; E-Mails: (P.D.P.O.); (P.M.J.); (P.S.M.)
| | - Pablo S. Mandolesi
- Departamento de Ingenieria Electrica y de Computadoras, Universidad Nacional del Sur, Bahia Blanca B8000FTN, Argentina; E-Mails: (P.D.P.O.); (P.M.J.); (P.S.M.)
| | - Fabian A. Buffa
- INTEMA Facultad de Ingenieria, Universidad Nacional de Mar del Plata, Mar del Plata B7608FDQ, Argentina; E-Mail:
| | - Alfredo Boselli
- Grupo MEMS, Comision Nacional de Energia Atomica, San Martin 1650, Buenos Aires, Argentina; E-Mails: (M.S.P.); (A.B.); (A.L.)
| | - Alberto Lamagna
- Grupo MEMS, Comision Nacional de Energia Atomica, San Martin 1650, Buenos Aires, Argentina; E-Mails: (M.S.P.); (A.B.); (A.L.)
| |
Collapse
|
320
|
Jacob DS, Rothschild A, Tuller HL, Gedanken A. In situ sonochemical hydrolysis and deposition of composite layers of ionic liquid entrapped in colloidal silica network and their application as sensors for various gases. ULTRASONICS SONOCHEMISTRY 2010; 17:726-729. [PMID: 20064734 DOI: 10.1016/j.ultsonch.2009.12.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2009] [Revised: 12/07/2009] [Accepted: 12/15/2009] [Indexed: 05/28/2023]
Abstract
An efficient one-step process for forming uniform solid-like layers of ionic liquid (IL) entrapped in colloidal silica network on interdigitated electrodes (IDE) using ultrasonic deposition is described in this communication. The electrical response of such layers deposited on insulating substrates fitted with interdigitated electrodes was measured upon exposure to different gases (H(2), NO(2), CO, and CH(4)) in air demonstrating reversible and sensitive response at 100 degrees C.
Collapse
Affiliation(s)
- David S Jacob
- Department of Chemistry and Kanbar Laboratory for Nanomaterials at the Bar-Ilan University Center for Advanced Materials and Nanotechnology, Bar-Ilan University, 52900 Ramat-Gan, Israel
| | | | | | | |
Collapse
|
321
|
Penza M, Rossi R, Alvisi M, Serra E. Metal-modified and vertically aligned carbon nanotube sensors array for landfill gas monitoring applications. NANOTECHNOLOGY 2010; 21:105501. [PMID: 20154374 DOI: 10.1088/0957-4484/21/10/105501] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Vertically aligned carbon nanotube (CNT) layers were synthesized on Fe-coated low-cost alumina substrates using radio-frequency plasma enhanced chemical vapour deposition (RF-PECVD) technology. A miniaturized CNT-based gas sensor array was developed for monitoring landfill gas (LFG) at a temperature of 150 degrees C. The sensor array was composed of 4 sensing elements with unmodified CNT, and CNT loaded with 5 nm nominally thick sputtered nanoclusters of platinum (Pt), ruthenium (Ru) and silver (Ag). Chemical analysis of multicomponent gas mixtures constituted of CO(2), CH(4), H(2), NH(3), CO and NO(2) has been performed by the array sensor responses and pattern recognition based on principal component analysis (PCA). The PCA results demonstrate that the metal-decorated and vertically aligned CNT sensor array is able to discriminate the NO(2) presence in the multicomponent mixture LFG. The NO(2) gas detection in the mixture LFG was proved to be very sensitive, e.g.: the CNT:Ru sensor shows a relative change in the resistance of 1.50% and 0.55% for NO(2) concentrations of 3.3 ppm and 330 ppb dispersed in the LFG, respectively, with a wide NO(2) gas concentration range measured from 0.33 to 3.3 ppm, at the sensor temperature of 150 degrees C. The morphology and structure of the CNT networks have been characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Raman spectroscopy. A forest-like nanostructure of vertically aligned CNT bundles in the multi-walled form appeared with a height of about 10 microm and a single-tube diameter varying in the range of 5-35 nm. The intensity ratio of the Raman spectroscopy D-peak and G-peak indicates the presence of disorder and defects in the CNT networks. The size of the metal (Pt, Ru, Ag) nanoclusters decorating the CNT top surface varies in the range of 5-50 nm. Functional characterization based on electrical charge transfer sensing mechanisms in the metal-modified CNT-chemoresistor array demonstrates high sensitivity by providing minimal sub-ppm level detection, e.g., download up to 100 ppb NO(2), at the sensor temperature of 150 degrees C. The gas sensitivity of the CNT sensor array depends on operating temperature, showing a lower optimal temperature of maximum sensitivity for the metal-decorated CNT sensors compared to unmodified CNT sensors. Results indicate that the recovery mechanisms in the CNT chemiresistors can be altered by a rapid heating pulse from room temperature to about 110 degrees C. A comparison of the NO(2) gas sensitivity for the chemiresistors based on disorderly networked CNTs and vertically aligned CNTs is also reported. Cross-sensitivity towards relative humidity of the CNT sensors array is investigated. Finally, the sensing properties of the metal-decorated and vertically aligned CNT sensor arrays are promising to monitor gas events in the LFG for practical applications with low power consumption and moderate sensor temperature.
Collapse
Affiliation(s)
- M Penza
- ENEA, Department of Physical Technologies and New Materials, PO Box 51 Br-4, I-72100 Brindisi, Italy.
| | | | | | | |
Collapse
|
322
|
Kauffman DR, Sorescu DC, Schofield DP, Allen BL, Jordan KD, Star A. Understanding the sensor response of metal-decorated carbon nanotubes. NANO LETTERS 2010; 10:958-63. [PMID: 20155969 DOI: 10.1021/nl903888c] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
We have explored the room temperature response of metal nanoparticle decorated single-walled carbon nanotubes (NP-SWNTs) using a combination of electrical transport, optical spectroscopy, and electronic structure calculations. We have found that upon the electrochemical growth of Au NPs on SWNTs, there is a transfer of electron density from the SWNT to the NP species, and that adsorption of CO molecules on the NP surface is accompanied by transfer of electronic density back into the SWNT. Moreover, the electronic structure calculations indicate dramatic variations in the charge density at the NP-SWNT interface, which supports our previous observation that interfacial potential barriers dominate the electrical behavior of NP-SWNT systems.
Collapse
Affiliation(s)
- Douglas R Kauffman
- U.S. Department of Energy, National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15263, USA
| | | | | | | | | | | |
Collapse
|
323
|
Liu L, Zhuang J, Liu K, Wang L, Li S, Li W, Li X. Improved and excellent ethanol sensing properties of SnO2/multiwalled carbon nanotubes. ACTA ACUST UNITED AC 2010. [DOI: 10.1007/s11434-009-0722-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
324
|
Di W, Wang X, Ren X. Nanocrystalline CePO(4):Tb as a novel oxygen sensing material on the basis of its redox responsive reversible luminescence. NANOTECHNOLOGY 2010; 21:75709. [PMID: 20090200 DOI: 10.1088/0957-4484/21/7/075709] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
This work reports for the first time on a new finding of luminescent CePO(4):Tb nanocrystals providing a novel oxygen sensing material on the basis of the redox responsive reversible luminescence in an oxidizing/reducing atmosphere. The origin of the luminescence quenching/recovery of nanocrystalline CePO(4):Tb was clearly demonstrated, from the surface chemistry of nanocrystals and the fluorescence decay dynamics of Tb(III). Our present work represents a preliminary demonstration of the feasibility of using nanocrystalline CePO(4):Tb as a novel oxygen sensing material since it yields several advantages including surfactant-free synthesis, dual detection functioning, rapid response, high sensitivity and good reproducibility.
Collapse
Affiliation(s)
- Weihua Di
- Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun, 130033, People's Republic of China.
| | | | | |
Collapse
|
325
|
Ratinac KR, Yang W, Ringer SP, Braet F. Toward ubiquitous environmental gas sensors-capitalizing on the promise of graphene. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2010; 44:1167-1176. [PMID: 20099803 DOI: 10.1021/es902659d] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Atomically thin sheets of carbon known as "graphene" have captured the imagination of much of the scientific world during the past few years. Although these single sheets of graphite were under our noses for years-within technologies ranging from the humble pencil, which has been around since at least 1565 (Petroski, H. The Pencil: A History of Design and Circumstance; Alfred A. Knopf: New York, 1993), to modern nuclear reactors-graphene was merely considered as part of graphite's crystal structure until 2004, when Novoselov, Geim, and colleagues (Science 2004, 306, 666-669) first presented some of the surprising electrical properties of graphene layers they had isolated by mechanically peeling sheets off graphite crystals. Today, graphene's unique electronic structures and properties, bolstered by other intriguing properties discovered in the intervening years, threaten the dominance of carbon nanotubes, a more mature allotrope of carbon, in potential applications from electronics to sensors. In this review, we will consider the promise of graphene for producing small-scale gas sensors for environmental monitoring.
Collapse
Affiliation(s)
- Kyle R Ratinac
- Australian Key Centre for Microscopy and Microanalysis, The University of Sydney, Sydney, NSW 2006, Australia.
| | | | | | | |
Collapse
|
326
|
Xue XY, Chen ZH, Chen YJ, Ma CH, Xing LL, Wang YG, Wang TH. Abnormal gas sensing characteristics arising from catalyzed morphological changes of ionsorbed oxygen. NANOTECHNOLOGY 2010; 21:065501. [PMID: 20057026 DOI: 10.1088/0957-4484/21/6/065501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Abnormal gas sensing characteristics are observed at low temperature in uniformly loaded Pt@SnO(2) nanorod gas sensors. The sensors operated at 200 degrees C exhibit opposite variations of resistances, and the change of resistance decreases with increasing ethanol concentration. In contrast, the sensors operated at 300 degrees C show regular behavior and the sensitivity is extremely high. Such behaviors are ascribed to Pt-catalyzed morphological changes of ionsorbed oxygen at low temperature. The present results are the bases for further investigating the effect of ionsorbed oxygen morphologies on gas sensing.
Collapse
Affiliation(s)
- Xin-Yu Xue
- College of Sciences, Northeastern University, Shenyang, People's Republic of China.
| | | | | | | | | | | | | |
Collapse
|
327
|
Kwon OS, Hong TJ, Kim SK, Jeong JH, Hahn JS, Jang J. Hsp90-functionalized polypyrrole nanotube FET sensor for anti-cancer agent detection. Biosens Bioelectron 2010; 25:1307-12. [DOI: 10.1016/j.bios.2009.10.019] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2009] [Revised: 10/12/2009] [Accepted: 10/14/2009] [Indexed: 10/20/2022]
|
328
|
Li X, Jia Y, Cao A. Tailored single-walled carbon nanotube--CdS nanoparticle hybrids for tunable optoelectronic devices. ACS NANO 2010; 4:506-512. [PMID: 20041712 DOI: 10.1021/nn901757s] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The integration of organic and inorganic building blocks into novel nanohybrids is an important tool to exploit innovative materials with desirable functionalities. For this purpose, carbon nanotube--nanoparticle nanoarchitectures are intensively studied. We report here an efficient noncovalent chemical route to density-controllably and uniformly assemble single-walled carbon nanotubes with CdS nanoparticles. The methodology not only promises the resulting hybrids will be solution-processable but also endows the hybrids with distinct optoelectronic properties including tunable photoresponse mediated by amine molecules. On the basis of these merits, reliable thin-film photoswitches and light-driven chemical sensors are demonstrated, which highlights the potential of tailored hybrids in the development of new tunable optoelectronic devices and sensors.
Collapse
Affiliation(s)
- Xianglong Li
- Department of Mechanical Engineering, University of Hawaii, Honolulu, Hawaii 96822, USA.
| | | | | |
Collapse
|
329
|
Chen D, Hou X, Wen H, Wang Y, Wang H, Li X, Zhang R, Lu H, Xu H, Guan S, Sun J, Gao L. The enhanced alcohol-sensing response of ultrathin WO3 nanoplates. NANOTECHNOLOGY 2010; 21:035501. [PMID: 19966401 DOI: 10.1088/0957-4484/21/3/035501] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Chemical sensors based on semiconducting metal oxide nanocrystals are of academic and practical significance in industrial processing and environment-related applications. Novel alcohol response sensors using two-dimensional WO(3) nanoplates as active elements have been investigated in this paper. Single-crystalline WO(3) nanoplates were synthesized through a topochemical approach on the basis of intercalation chemistry (Chen et al 2008 Small 4 1813). The as-obtained WO(3) nanoplate pastes were coated on the surface of an Al(2)O(3) ceramic microtube with four Pt electrodes to measure their alcohol-sensing properties. The results show that the WO(3) nanoplate sensors are highly sensitive to alcohols (e.g., methanol, ethanol, isopropanol and butanol) at moderate operating temperatures (260-360 degrees C). For butanol, the WO(3) nanoplate sensors have a sensitivity of 31 at 2 ppm and 161 at 100 ppm, operating at 300 degrees C. For other alcohols, WO(3) nanoplate sensors also show high sensitivities: 33 for methanol at 300 ppm, 70 for ethanol at 200 ppm, and 75 for isopropanol at 200 ppm. The response and recovery times of the WO(3) nanoplate sensors are less than 15 s for all the test alcohols. A good linear relationship between the sensitivity and alcohol concentrations has been observed in the range of 2-300 ppm, whereas the WO(3) nanoparticle sensors have not shown such a linear relationship. The sensitivities of the WO(3) nanoplate sensors decrease and their response times become short when the operating temperatures increase. The enhanced alcohol-sensing performance could be attributed to the ultrathin platelike morphology, the high crystallinity and the loosely assembling structure of the WO(3) nanoplates, due to the advantages of the effective adsorption and rapid diffusion of the alcohol molecules.
Collapse
Affiliation(s)
- Deliang Chen
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, People's Republic of China
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
330
|
Jacobs CB, Peairs MJ, Venton BJ. Review: Carbon nanotube based electrochemical sensors for biomolecules. Anal Chim Acta 2010; 662:105-27. [PMID: 20171310 DOI: 10.1016/j.aca.2010.01.009] [Citation(s) in RCA: 567] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2009] [Revised: 12/22/2009] [Accepted: 01/05/2010] [Indexed: 11/30/2022]
Abstract
Carbon nanotubes (CNTs) have been incorporated in electrochemical sensors to decrease overpotential and improve sensitivity. In this review, we focus on recent literature that describes how CNT-based electrochemical sensors are being developed to detect neurotransmitters, proteins, small molecules such as glucose, and DNA. Different types of electrochemical methods are used in these sensors including direct electrochemical detection with amperometry or voltammetry, indirect detection of an oxidation product using enzyme sensors, and detection of conductivity changes using CNT-field effect transistors (FETs). Future challenges for the field include miniaturizing sensors, developing methods to use only a specific nanotube allotrope, and simplifying manufacturing.
Collapse
Affiliation(s)
- Christopher B Jacobs
- Dept. of Chemistry, University of Virginia, PO Box 400319, Charlottesville, VA 22904, United States
| | | | | |
Collapse
|
331
|
Kauffman DR, Star A. Graphene versus carbon nanotubes for chemical sensor and fuel cell applications. Analyst 2010; 135:2790-7. [DOI: 10.1039/c0an00262c] [Citation(s) in RCA: 137] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
332
|
FUJIGAYA T, TANAKA Y, NAKASHIMA N. Soluble Carbon Nanotubes and Application to Electrochemistry. ELECTROCHEMISTRY 2010. [DOI: 10.5796/electrochemistry.78.2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
333
|
Kong L, Wang J, Luo T, Meng F, Chen X, Li M, Liu J. Novel pyrenehexafluoroisopropanol derivative-decorated single-walled carbon nanotubes for detection of nerve agents by strong hydrogen-bonding interaction. Analyst 2010; 135:368-74. [DOI: 10.1039/b920266h] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
334
|
Leghrib R, Felten A, Demoisson F, Reniers F, Pireaux J, Llobet E. Selective detection of benzene traces at room temperature using metal decorated carbon nanotubes. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.proeng.2010.09.128] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
335
|
Lupo F, Gentile S, Ballistreri FP, Tomaselli GA, Fragalà ME, Gulino A. Viable route for switching of an engineered silica surface using Cu2+ ions at sub-ppm levels. Analyst 2010; 135:2273-9. [DOI: 10.1039/c0an00364f] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
336
|
Allen BL, Kotchey GP, Chen Y, Yanamala NVK, Klein-Seetharaman J, Kagan VE, Star A. Mechanistic Investigations of Horseradish Peroxidase-Catalyzed Degradation of Single-Walled Carbon Nanotubes. J Am Chem Soc 2009; 131:17194-205. [DOI: 10.1021/ja9083623] [Citation(s) in RCA: 246] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Brett L. Allen
- Departments of Chemistry, Environmental and Occupational Health, and Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, and National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15260
| | - Gregg P. Kotchey
- Departments of Chemistry, Environmental and Occupational Health, and Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, and National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15260
| | - Yanan Chen
- Departments of Chemistry, Environmental and Occupational Health, and Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, and National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15260
| | - Naveena V. K. Yanamala
- Departments of Chemistry, Environmental and Occupational Health, and Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, and National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15260
| | - Judith Klein-Seetharaman
- Departments of Chemistry, Environmental and Occupational Health, and Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, and National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15260
| | - Valerian E. Kagan
- Departments of Chemistry, Environmental and Occupational Health, and Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, and National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15260
| | - Alexander Star
- Departments of Chemistry, Environmental and Occupational Health, and Structural Biology, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, and National Energy Technology Laboratory, Pittsburgh, Pennsylvania 15260
| |
Collapse
|
337
|
Heller I, Smaal WTT, Lemay SG, Dekker C. Probing macrophage activity with carbon-nanotube sensors. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2009; 5:2528-2532. [PMID: 19697305 DOI: 10.1002/smll.200900823] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Affiliation(s)
- Iddo Heller
- Section Molecular Biophysics, Kavli Institute of NanoScience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
| | | | | | | |
Collapse
|
338
|
Roberts ME, LeMieux MC, Bao Z. Sorted and aligned single-walled carbon nanotube networks for transistor-based aqueous chemical sensors. ACS NANO 2009; 3:3287-93. [PMID: 19856982 DOI: 10.1021/nn900808b] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Detecting trace amounts of analytes in aqueous systems is important for health diagnostics, environmental monitoring, and national security applications. Single-walled carbon nanotubes (SWNTs) are ideal components for both the sensor material and active signal transduction layer because of their excellent electronic properties and high aspect ratio consisting of entirely surface atoms. Submonolayer arrays, or networks of SWNTs (SWNTnts) are advantageous, and we show that topology characteristics of the SWNT network, such as alignment, degree of bundling, and chirality enrichment strongly affect the sensor performance. To enable this, thin-film transistor (TFT) sensors with SWNTnts were deposited using a one-step, low-cost, solution- based method on a polymer dielectric, allowing us to achieve stable low-voltage operation under aqueous conditions. These SWNT-TFTs were used to detect trace concentrations, down to 2 ppb, of dimethyl methylphosphonate (DMMP) and trinitrotoluene (TNT) in aqueous solutions. Along with reliable cycling underwater, the TFT sensors fabricated with aligned, sorted nanotube networks (enriched with semiconductor SWNTs) showed a higher sensitivity to analytes than those fabricated with random, unsorted networks with predominantly metallic charge transport.
Collapse
Affiliation(s)
- Mark E Roberts
- Department of Chemical Engineering, Stanford University, Stauffer III, 381 North-South Mall, Stanford, California 94305-5025, USA
| | | | | |
Collapse
|
339
|
Cao X, Li B, Huang Y, Boey F, Yu T, Shen Z, Zhang H. Facile "scratching" method with common metal objects to generate large-scale catalyst patterns used for growth of single-walled carbon nanotubes. ACS APPLIED MATERIALS & INTERFACES 2009; 1:1873-1877. [PMID: 20355809 DOI: 10.1021/am900478y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A facile "scratching" method to pattern a catalyst with commonly used metal objects, such as blade, pen cover, tweezers, watchband, knife, key, clamp, and coin, was developed. The single-walled carbon nanotube (SWCNT) networks and well-aligned SWCNT arrays successfully grew by chemical vapor deposition on the scratched catalyst patterns on Si/SiO(x) and quartz, respectively. This method provides an extremely simple and nearly zero-cost way to fabricate large-scale catalyst patterns used for controlled growth of SWCNT arrays, which could have potential applications in the fabrication of CNT-based devices.
Collapse
Affiliation(s)
- Xiehong Cao
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
| | | | | | | | | | | | | |
Collapse
|
340
|
Nocke A, Richter S, Wolf M, Gerlach G. Polymer composite strain sensor based on dielectrophoretically aligned tellurium nanorods. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.proche.2009.07.287] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
341
|
Wang Y, Zhou Z, Yang Z, Chen X, Xu D, Zhang Y. Gas sensors based on deposited single-walled carbon nanotube networks for DMMP detection. NANOTECHNOLOGY 2009; 20:345502. [PMID: 19652278 DOI: 10.1088/0957-4484/20/34/345502] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Sensors based on single-walled carbon nanotube (SWNT) networks were fabricated and their sensitive properties for the nerve agent stimulant dimethyl methylphosphonate (DMMP) vapor were investigated at room temperature. The SWNT networks were deposited on oxidized silicon surface functionalized with 3-aminopropyltrimethysilane (APS). Combining with a traditional silicon process, SWNT-based gas sensors were made at a wafer scale. The effects of the density of deposited SWNTs on the sensor response were studied. The excellent response is obtained under a density of 30-40 tubes microm(-2). The sensors exhibit high resistance response, fast response time, rapid recovery and good reproducibility for DMMP vapor. The deposited SWNT sensors will be potentially extended to large-scale fabrication.
Collapse
Affiliation(s)
- Yanyan Wang
- National Key Laboratory of Nano/Micro Fabrication Technology, Research Institute of Micro/NanoScience and Technology, Shanghai Jiao Tong University, Shanghai, People's Republic of China.
| | | | | | | | | | | |
Collapse
|
342
|
Kauffman DR, Shade CM, Uh H, Petoud S, Star A. Decorated carbon nanotubes with unique oxygen sensitivity. Nat Chem 2009; 1:500-6. [DOI: 10.1038/nchem.323] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2009] [Accepted: 07/07/2009] [Indexed: 12/28/2022]
|
343
|
Xu S, Tang L, Bi C, Wang X, Lv Y. A cataluminescence gas sensor for ammonium sulfide based on Fe3O4-carbon nanotubes composite. LUMINESCENCE 2009; 25:294-9. [DOI: 10.1002/bio.1142] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
|
344
|
Liu J, Zou J, Zhai L. Bottom-up Assembly of Poly(3-hexylthiophene) on Carbon Nanotubes: 2D Building Blocks for Nanoscale Circuits. Macromol Rapid Commun 2009; 30:1387-91. [DOI: 10.1002/marc.200900225] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Accepted: 04/08/2009] [Indexed: 11/07/2022]
|
345
|
Yoon H, Lee SH, Kwon OS, Song HS, Oh EH, Park TH, Jang J. Polypyrrole nanotubes conjugated with human olfactory receptors: high-performance transducers for FET-type bioelectronic noses. Angew Chem Int Ed Engl 2009; 48:2755-8. [PMID: 19274689 DOI: 10.1002/anie.200805171] [Citation(s) in RCA: 131] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Get a whiff of this: Human olfactory receptor (hOR)-conjugated polypyrrole (PPy) nanotubes were integrated into the field-effect transistor (FET) sensor platform for the fabrication of high-performance bioelectronic noses (see picture, S = source, D = drain). The device can translate and amplify hOR-odorant interaction into a detectable signal, and it showed highly sensitive and specific responses toward a target odorant.
Collapse
Affiliation(s)
- Hyeonseok Yoon
- School of Chemical and Biological Engineering, Seoul National University, 599 Gwanangno, Gwanakgu, Seoul 151-742, Korea
| | | | | | | | | | | | | |
Collapse
|
346
|
Ghatnekar-Nilsson S, Karlsson I, Kvennefors A, Luo G, Zela V, Arlelid M, Parker T, Montelius L, Litwin A. A new multifunctional platform based on high aspect ratio interdigitated NEMS structures. NANOTECHNOLOGY 2009; 20:175502. [PMID: 19420592 DOI: 10.1088/0957-4484/20/17/175502] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
A multifunctional NEMS platform based on a mass-producible, surface relief grating has been developed and fabricated directly in polymer materials. The pattern consists of high aspect ratio interdigitated nanometer-sized pairs of walls and can be produced in a low-complexity one-step patterning process with nanoimprint lithography. In this paper, we demonstrate the usefulness of the platform primarily by showing an application as a high-sensitivity mass sensor in air. The sensors, which are based on the high frequency resonant response of around 200 MHz, show a mass responsivity of the order of 0.1 Hz/zg per wall at room temperature and in ambient air. Their ability to selectively adsorb airborne target molecules, such as thiols, is also demonstrated. We also show that the same device can function as a varactor for electronic circuits based on its large tunable capacitive range.
Collapse
|
347
|
Im J, Chandekar A, Whitten JE. Anomalous vapor sensor response of a fluorinated alkylthiol-protected gold nanoparticle film. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2009; 25:4288-4292. [PMID: 19366214 DOI: 10.1021/la900016u] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Monolayer-protected gold nanoparticle films generally swell and increase their electrical resistance when exposed to organic vapors. Films of gold nanoparticles protected by 1H,1H,2H,2H-perfluorodecanethiol (PFDT) exhibit an anomalous response in which the resistance decreases for all vapors investigated. Electron microscopy illustrates that the PFDT-functionalized gold nanoparticles are hexagonally ordered with an interparticle separation of 3 nm. Quartz crystal microbalance measurements confirm substantial mass uptake, but the relatively large interparticle separation and insulating properties of the gold particles lead to a porous film whose electrical resistance is strongly influenced by changes in the relative permittivity and reversible, vapor-induced changes in film morphology.
Collapse
Affiliation(s)
- Jisun Im
- Department of Chemistry and Center for High-Rate Nanomanufacturing, The University of Massachusetts Lowell, Lowell, Massachusetts 01854, USA
| | | | | |
Collapse
|
348
|
Yoon H, Lee S, Kwon O, Song H, Oh E, Park T, Jang J. Polypyrrole Nanotubes Conjugated with Human Olfactory Receptors: High-Performance Transducers for FET-Type Bioelectronic Noses. Angew Chem Int Ed Engl 2009. [DOI: 10.1002/ange.200805171] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
349
|
Zhao JX, Ding YH. Can Silicon Carbide Nanotubes Sense Carbon Dioxide? J Chem Theory Comput 2009; 5:1099-105. [DOI: 10.1021/ct9000069] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jing-xiang Zhao
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People’s Republic of China, and Department of Chemistry, Harbin Normal University, Harbin 150080, People’s Republic of China
| | - Yi-hong Ding
- State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, People’s Republic of China, and Department of Chemistry, Harbin Normal University, Harbin 150080, People’s Republic of China
| |
Collapse
|
350
|
Fowler JD, Allen MJ, Tung VC, Yang Y, Kaner RB, Weiller BH. Practical chemical sensors from chemically derived graphene. ACS NANO 2009; 3:301-306. [PMID: 19236064 DOI: 10.1021/nn800593m] [Citation(s) in RCA: 568] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
We report the development of useful chemical sensors from chemically converted graphene dispersions using spin coating to create single-layer films on interdigitated electrode arrays. Dispersions of graphene in anhydrous hydrazine are formed from graphite oxide. Preliminary results are presented on the detection of NO(2), NH(3), and 2,4-dinitrotoluene using this simple and scalable fabrication method for practical devices. Current versus voltage curves are linear and ohmic in all cases, studied independent of metal electrode or presence of analytes. The sensor response is consistent with a charge transfer mechanism between the analyte and graphene with a limited role of the electrical contacts. A micro hot plate sensor substrate is also used to monitor the temperature dependence of the response to nitrogen dioxide. The results are discussed in light of recent literature on carbon nanotube and graphene sensors.
Collapse
Affiliation(s)
- Jesse D Fowler
- Materials Processing and Evaluation Department, Space Materials Laboratory, The Aerospace Corporation, P.O. Box 92957/M2-248, Los Angeles, California 90009, USA
| | | | | | | | | | | |
Collapse
|