Inlaid Multi‐Walled Carbon Nanotube Nanoelectrode Arrays for Electroanalysis

Li, Jun; Koehne, Jessica E.; Cassell, Alan M.; Chen, Hua; Ng, Hou T.; Qi, Ye; Fan, Wendy; Han, Jie; Meyyappan, M.

doi:10.1002/elan.200403114

Cited by 150 publications

(111 citation statements)

References 58 publications

Supporting

Mentioning

107

Contrasting

Unclassified

Order By: Relevance

“…1a). The embedded VACNF were fabricated as described previously [15][16][17][18]. Briefly, a 4" silicon (100) wafer (Si-Tech, Topsfield, MA) was diced into small chips of 1 cm × 2 cm.…”

Section: Dep Device Fabricationmentioning

confidence: 99%

Manipulation of bacteriophages with dielectrophoresis on carbon nanofiber nanoelectrode arrays

et al. 2013

Self Cite

View full text Add to dashboard Cite

This work describes efficient manipulation of bacteriophage virus particles using a nanostructured dielectrophoresis (DEP) device. The non-uniform electric field for DEP is created by utilizing a nanoelectrode array (NEA) made of vertically aligned carbon nanofibers (VACNFs) versus a macroscopic indium tin oxide electrode in a "points-and-lid" configuration integrated in a microfluidic channel. The capture of the virus particles has been systematically investigated versus the flow velocity, sinusoidal AC frequency, peak-to-peak voltage, and virus concentration. The DEP capture at all conditions is reversible and the captured virus particles are released immediately when the voltage is turned off. At the low virus concentration (8.9×10 4 pfu·ml −1 ), the DEP capture efficiency up to 60% can be obtained. The virus particles are individually captured at isolated nanoelectrode tips and accumulate linearly with time. Due to the comparable size, it is more effective to capture virus particles than larger bacterial cells with such NEA based DEP devices. This technique can be potentially utilized as a fast sample preparation module in a microfluidic chip to capture, separate, and concentrate viruses and other biological particles in small volumes of dilute solutions in a portable detection system for field applications.

show abstract

“…1a). The embedded VACNF were fabricated as described previously [15][16][17][18]. Briefly, a 4" silicon (100) wafer (Si-Tech, Topsfield, MA) was diced into small chips of 1 cm × 2 cm.…”

Section: Dep Device Fabricationmentioning

confidence: 99%

Manipulation of bacteriophages with dielectrophoresis on carbon nanofiber nanoelectrode arrays

et al. 2013

Self Cite

View full text Add to dashboard Cite

show abstract

“…Some groups have exploited these methodologies and have developed, for instance, vertical 3D CNT ensembles with different CNT density embedded or not in an insulating matrix (SiO 2 ) [138][139][140] . These CNTs are grown directly onto an electrode surface (e.g.…”

Section: Vertically Aligned Carbon Nanotube Electrodes (Vacntmicroelementioning

confidence: 99%

Carbon Nanotubes as Platforms for Biosensors with Electrochemical and Electronic Transduction

Pujadó

2012

Springer Theses

View full text Add to dashboard Cite

CCa ar rb bo on n n na an no ot tu ub be es s a as s p pl la at tf fo or rm ms s f fo or r b bi io os se en ns so or rs s w wi it th h e el le ec ct tr ro oc ch he em mi ic ca al l a an nd d e el le ec ct tr ro on ni ic c t tr ra an ns sd du uc ct ti io on n By Mercè Pacios Pujadó Universitat Autònoma de Barcelona The present thesis entitled "CARBON NANOTUBES AS PLATFORMS FOR BIOSENSORS WITH ELECTROCHEMICAL AND ELECTRONIC TRANSDUCTION"has been performed at the laboratories of the "Sensor and Biosensor" group of Chemistry Department at "Universitat Autònoma de Barcelona" under the direction of Dra. Maria José Esplandiu Egido CSIC senior reseracher in the Institute of Nanoscience and Nanotechnology (CIN2-CSIC) and Dr. Manel del Valle Zafra, UAB Titular professor. Memòria presentada per aspirer al Grau de Doctor per Mercè Pacios PujadóDra. Maria José Esplandiu Egido Dr. Manel del Valle Zafra Bellaterra, 26th September 2011The present PhD thesis was financially supported by the Ministry of Education andScience of Spain through a FPI pre-doctoral grant (Project NAN2004-093006-C05-03and CTQ-2006-15681-C02-01). Grup de Sensors i BiosensorsUnitat de Quimica Analitica A AB BB BR RE EV VI IA AT TI IO ON NS S A AN ND D S SY YM MB BO OL LS S ABBREVIATIONS AND SYMBOLS SUMMARYThe convergence of nano and biotechnology is enabling scientific and technical knowledge for improving human well being. Within this new field of nanobiotechnology, the area of (bio)sensors is the most developed and the one which has the highest potential for short-term applications. In this context, (bio) sensors based on electrochemical principles stand out due to their marked advantages in terms of simplicity, robustness, low cost, miniaturization capability and integration to devices.These sensors are becoming very attractive for rapid and simple diagnostic, in fields such as biotechnology, clinical and environmental research.Historically, carbon has been a widely used and practical electrode material due to its desirable properties for electrochemical applications. Available in a variety of structures, carbon electrodes provide, in general, good electrical conductivity, high thermal and mechanical stability, a wide operable potential window with slow oxidation kinetics and, in many cases, electrocatalytical activity. On top of that, they are recognized as versatile and easy handling materials, and also praised by their rich surface chemistry which has been exploited to influence surface reactivity. Thus, The third and last part of the study is focused on exploiting the semiconductor character of carbon nanotubes for sensor technology by using a field effect transistor XXIX configuration (FET). The CNT-FET device has been optimized for operating in liquid environment by performing passivation protocols. This, together with the use of bifunctional pyrene linkers for the immobilization of the aptamers, has allowed sensitive electronic detection of protein/aptamer interaction. Additionally, we were also able to follow up protein adsorption and protei...

show abstract

“…Semiconducting nanotubes represent about two-thirds of the SWNTs, whereas metallic tubes represent about one-third. These properties could be exploited for the fabrication of new electronic devices containing CNTs such as field-effect transistors (FETs), nanoelectrode arrays (NEAs), nanoelectrode ensembles (NEEs) or screen-printed electrodes (SPEs) [158][159][160][161][162][163][164][165][166][167]. FET devices need semiconductor-type nanotubes.…”

Section: Cnts In Diagnosismentioning

confidence: 99%

“…The utilization of nanotubes also permitted the development of nucleic acid sensors [165,185]. The free carboxylic functions on the carbon nanoelectrode were used to covalently link different 5 0 -amine modified oligonucleotides.…”

Section: Nanoelectrode Biosensorsmentioning

confidence: 99%