Electrochemical glutamate biosensing with nanocube and nanosphere augmented single-walled carbon nanotube networks: a comparative study

Claussen, Jonathan C.; Artiles, Mayra S.; McLamore, Eric S.; Mohanty, Subhashree; Shi, Jin; Rickus, Jenna L.; Fisher, Timothy S.; Porterfield, D. Marshall

doi:10.1039/c1jm11561h

Cited by 59 publications

(45 citation statements)

References 55 publications

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“…Based on the CV profile, Randles-Sevcik analysis was used to determine the effective surface area , respectively. These values are relatively small in comparison to previous reported electrodes owing to the electrode size being ~130 times smaller than the electrode size reported from our research group 11 . Note that the MAB electrode effective surface area could be enhanced by modifying the surface with nanomaterials 11 .…”

Section: Biochip Design and Experimental Methodscontrasting

confidence: 46%

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

Salim¹,

Zeitchek²,

Hermann³

et al. 2013

JoVE

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Lab-on-a-chip (LOC) applications in environmental, biomedical, agricultural, biological, and spaceflight research require an ion-selective electrode (ISE) that can withstand prolonged storage in complex biological media [1][2][3][4] . An all-solid-state ion-selective-electrode (ASSISE) is especially attractive for the aforementioned applications. The electrode should have the following favorable characteristics: easy construction, low maintenance, and (potential for) miniaturization, allowing for batch processing. A microfabricated ASSISE intended for quantifying H + , Ca 2+ , and CO 3 2-ions was constructed. It consists of a noble-metal electrode layer (i.e. Pt), a transduction layer, and an ion-selective membrane (ISM) layer. The transduction layer functions to transduce the concentration-dependent chemical potential of the ion-selective membrane into a measurable electrical signal.The lifetime of an ASSISE is found to depend on maintaining the potential at the conductive layer/membrane interface [5][6][7] . To extend the ASSISE working lifetime and thereby maintain stable potentials at the interfacial layers, we utilized the conductive polymer (CP) poly(3,4-ethylenedioxythiophene) (PEDOT) 7-9 in place of silver/silver chloride (Ag/AgCl) as the transducer layer. We constructed the ASSISE in a lab-ona-chip format, which we called the multi-analyte biochip (MAB) (Figure 1).Calibrations in test solutions demonstrated that the MAB can monitor pH (operational range pH 4-9), CO 3 2-(measured range 0.01 mM -1 mM),and Ca 2+ (log-linear range 0.01 mM to 1 mM). The MAB for pH provides a near-Nernstian slope response after almost one month storage in algal medium. The carbonate biochips show a potentiometric profile similar to that of a conventional ion-selective electrode. Physiological measurements were employed to monitor biological activity of the model system, the microalga Chlorella vulgaris.The MAB conveys an advantage in size, versatility, and multiplexed analyte sensing capability, making it applicable to many confined monitoring situations, on Earth or in space. Biochip Design and Experimental MethodsThe biochip is 10 x 11 mm in dimension and has 9 ASSISEs designated as working electrodes (WEs) and 5 Ag/AgCl reference electrodes (REs). Each working electrode (WE) is 240 μm in diameter and is equally spaced at 1.4 mm from the REs, which are 480 μm in diameter. These electrodes are connected to electrical contact pads with a dimension of 0.5 mm x 0.5 mm. The schematic is shown in Figure 2.Cyclic voltammetry (CV) and galvanostatic deposition methods are used to electropolymerize the PEDOT films using a Bioanalytical Systems Inc. (BASI) C3 cell stand (Figure 3). The counter-ion for the PEDOT film is tailored to suit the analyte ion of interest. A PEDOT with poly(styrenesulfonate) counter ion (PEDOT/PSS) is utilized for H + and CO 3 2-, while one with sulphate (added to the solution as CaSO 4 ) is utilized for Ca 2+ . The electrochemical properties of the PEDOT-coated WE is analyzed using CVs in redox-acti...

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Section: Biochip Design and Experimental Methodscontrasting

confidence: 46%

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

Salim¹,

Zeitchek²,

Hermann³

et al. 2013

JoVE

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“…for a ferricyanide solution of 4 mm Fe(CN) 6 3À and 1 M KNO 3 ), 58,59 c is the solution concentration (mol cm À3 ), and v is the potential scan rate (V s À1 ). 60 CVs were obtained with a potential scan that was cycled between À0.2 and 0.6 V vs the Ag/AgCl reference electrode with a scan rate of 10 mV s À1 (Figure 4d).…”

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confidence: 99%

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH₂O₂Decomposition

et al. 2015

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The utility of unmanned micro underwater vehicles (MUVs) is paramount for exploring confined spaces, but their spatial agility is often impaired when maneuvers require burst-propulsion. Herein we develop highaspect ratio (150:1), multiwalled carbon nanotube microarray membranes (CNT-MMs) for propulsive, MUV thrust generation by the decomposition of hydrogen peroxide (H 2 O 2 ). The CNT-MMs are grown via chemical vapor deposition with diamond shaped pores (nominal diagonal dimensions of 4.5 × 9.0 μm) and subsequently decorated with urchin-like, platinum (Pt) nanoparticles via a facile, electroless, chemical deposition process. The Pt-CNT-MMs display robust, high catalytic ability with an effective activation energy of 26.96 kJ mol -1 capable of producing a thrust of 0.209 ± 0.049 N from 50% [w/w] H 2 O 2 decomposition within a compact reaction chamber of eight Pt-CNT-MMs in series. A n upward trend in the research and use of unmanned underwater vehicles (UUVs), and in particular micro underwater vehicles (MUVs, small UUVS between 1 and 50 cm in length), for exploration of confined spaces such as ship wrecks, submerged oil pipelines, and various military purposes has been observed over recent years. 1À3 The locomotion of these vehicles is typically controlled by propellerbased systems, which are often used for long-endurance missions. 4À6 However, propeller-based systems are usually limited in their ability to perform tight radius turns, burst-driven docking maneuvers, and lowspeed course corrections. ABSTRACT The utility of unmanned micro underwater vehicles (MUVs) is paramount for exploring confined spaces, but their spatial

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“…9 This superior performance makes Pt catalysts wellsuited for H 2 O 2 decomposition as demonstrated in a wide variety of small-scale applications including sensors/biosensors, 21−23 Pt-loaded stomatocytes, 24 tubular bubble thrusters or nanomotors/microengines, 25 and microelectromechanical system (MEMS) based thrusters. 26 PtNPs have been grown on a wide variety of substrates including highly conductive surfaces such as graphene, 27−29 carbon nanotubes (CNTs), 30,31 and graphene foam, 32 as well as nonconductive surfaces such as oxides (e.g., SiO 2 , aluminum oxide), 33 and paper/cellulose. 34 Templates such as mesoporous silica networks, polycarbonate, and porous anodic alumina are often employed to form Pt nanoparticles/nanowires onto surfaces via electrodeposition.…”

Section: ■ Introductionmentioning

confidence: 99%

Platinum Nanoparticle Decorated SiO₂ Microfibers as Catalysts for Micro Unmanned Underwater Vehicle Propulsion

Chen

Garland

Geder

et al. 2016

ACS Appl. Mater. Interfaces

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Micro unmanned underwater vehicles (UUVs) need to house propulsion mechanisms that are small in size but sufficiently powerful to deliver on-demand acceleration for tight radius turns, burst-driven docking maneuvers, and low-speed course corrections. Recently, small-scale hydrogen peroxide (H2O2) propulsion mechanisms have shown great promise in delivering pulsatile thrust for such acceleration needs. However, the need for robust, high surface area nanocatalysts that can be manufactured on a large scale for integration into micro UUV reaction chambers is still needed. In this report, a thermal/electrical insulator, silicon oxide (SiO2) microfibers, is used as a support for platinum nanoparticle (PtNP) catalysts. The mercapto-silanization of the SiO2 microfibers enables strong covalent attachment with PtNPs, and the resultant PtNP–SiO2 fibers act as a robust, high surface area catalyst for H2O2 decomposition. The PtNP–SiO2 catalysts are fitted inside a micro UUV reaction chamber for vehicular propulsion; the catalysts can propel a micro UUV for 5.9 m at a velocity of 1.18 m/s with 50 mL of 50% (w/w) H2O2. The concomitance of facile fabrication, economic and scalable processing, and high performanceincluding a reduction in H2O2 decomposition activation energy of 40–50% over conventional material catalystspaves the way for using these nanostructured microfibers in modern, small-scale underwater vehicle propulsion systems.

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Electrochemical glutamate biosensing with nanocube and nanosphere augmented single-walled carbon nanotube networks: a comparative study

Cited by 59 publications

References 55 publications

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH₂O₂Decomposition

Platinum Nanoparticle Decorated SiO₂ Microfibers as Catalysts for Micro Unmanned Underwater Vehicle Propulsion

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Electrochemical glutamate biosensing with nanocube and nanosphere augmented single-walled carbon nanotube networks: a comparative study

Cited by 59 publications

References 55 publications

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

Multi-analyte Biochip (MAB) Based on All-solid-state Ion-selective Electrodes (ASSISE) for Physiological Research

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH2O2Decomposition

Platinum Nanoparticle Decorated SiO2 Microfibers as Catalysts for Micro Unmanned Underwater Vehicle Propulsion

Contact Info

Product

Resources

About

High Aspect Ratio Carbon Nanotube Membranes Decorated with Pt Nanoparticle Urchins for Micro Underwater Vehicle PropulsionviaH₂O₂Decomposition

Platinum Nanoparticle Decorated SiO₂ Microfibers as Catalysts for Micro Unmanned Underwater Vehicle Propulsion