Nanomaterials for Sensing Applications: Introduction and Perspective

Tuantranont, Adisorn

doi:10.1007/5346_2012_41

Cited by 16 publications

(24 citation statements)

References 176 publications

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“…Nanostructured materials have been revolutionizing almost every field of applied research due to their unusual, yet attractive and useful, physicochemical properties in the nanoregime. − One-dimensional nanomaterials, which include nanowires, nanofibers, nanorods, and nanoneedles with high aspect ratios, are among those with exciting uses in electrochemical energy conversion catalysis (both fuel formation and fuel consumption) and electrochemical energy storage . The successful commercialization of any given nanomaterial is primarily influenced by its ready access.…”

Section: Introductionmentioning

confidence: 99%

Pushing the Limits of Rapid Anodic Growth of CuO/Cu(OH)₂Nanoneedles on Cu for the Methanol Oxidation Reaction: Anodization pH Is the Game Changer

Anantharaj

Sugime

Yamaoka

et al. 2021

ACS Appl. Energy Mater.

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We recently reported the fastest anodization method (just 80 s) of all for accessing a denser array of Cu(OH) 2 −CuO nanoneedles on a Cu foil substrate by applying a constant potential of 0.864 V vs a reversible hydrogen electrode in 1.0 M KOH that delivered a better activity for the methanol oxidation reaction (MOR). In this study, we show that the strength of the KOH solution used for anodization alters the size, morphology, surface chemistry, electrochemical accessibility of Cu sites, and the subsequent MOR activity trend. Intriguingly, an increase in KOH solution strength shortens the time of anodization from 80 s (1.0 M KOH) to 20 s with 3.0 M KOH, which in turn drastically reduces to just 6 s with 6.0 M KOH. As of now, this is the shortest time ever achieved for the anodic growth of Cu−OH/O nanoneedles on a Cu substrate. A set of detailed and comparative physical and electrochemical characterizations reveal positive relationships between anodization pH and anodization current, the size of Cu− OH/O nanoneedles grown, rate of growth, electrochemical accessibility of Cu sites, and electrocatalytic MOR activity. Thus, this study provides a universal approach to control the size of Cu−OH/O nanoneedles, electrochemical accessibility of Cu sites, and their subsequent MOR activity.

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Section: Introductionmentioning

confidence: 99%

Pushing the Limits of Rapid Anodic Growth of CuO/Cu(OH)₂Nanoneedles on Cu for the Methanol Oxidation Reaction: Anodization pH Is the Game Changer

Anantharaj

Sugime

Yamaoka

et al. 2021

ACS Appl. Energy Mater.

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“…Here they can find a use as part of reliable super flexible perovskite solar cells or as anodes in solar cells. Graphene is also used as an effective conductive filler to produce composite structures for EMI shielding [ 48 , 49 ]—again, in combination with polymeric materials.…”

Section: Carbon Nanostructures and Their Compositesmentioning

confidence: 99%

Carbon Nanostructures, Nanolayers, and Their Composites

2021

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The versatility of the arrangement of C atoms with the formation of different allotropes and phases has led to the discovery of several new structures with unique properties. Carbon nanomaterials are currently very attractive nanomaterials due to their unique physical, chemical, and biological properties. One of these is the development of superconductivity, for example, in graphite intercalated superconductors, single-walled carbon nanotubes, B-doped diamond, etc. Not only various forms of carbon materials but also carbon-related materials have aroused extraordinary theoretical and experimental interest. Hybrid carbon materials are good candidates for high current densities at low applied electric fields due to their negative electron affinity. The right combination of two different nanostructures, CNF or carbon nanotubes and nanoparticles, has led to some very interesting sensors with applications in electrochemical biosensors, biomolecules, and pharmaceutical compounds. Carbon materials have a number of unique properties. In order to increase their potential application and applicability in different industries and under different conditions, they are often combined with other types of material (most often polymers or metals). The resulting composite materials have significantly improved properties.

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“…This is due to the advantages of MOS gas sensors, which include low power consumption, low cost, high sensitivity, and quick response, with excellent microelectronic processing compatibility [12]. To improve the CO 2 sensor, several semiconductor materials, such as tin dioxide (SnO 2 ), tungsten trioxide (WO 3 ), copper oxide (CuO), and zinc oxide (ZnO), were used [13][14][15]. ZnO is an n-type semiconductor with a wide optical bandgap energy (3.37 eV).…”

Section: Introductionmentioning

confidence: 99%

“…gas) → O 2 (ads) (12) O 2 (ads) + e − → O 2 − (ads)(13)O 2 − (ads) + e − → 2O − (ads)(14)− (ads) + e − → O 2− (ads)(15) …”

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confidence: 99%

Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature

et al. 2021

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Thin films of ZnO and ZnO/carbon nanotubes (CNTs) are prepared and used as CO2 gas sensors. The spray pyrolysis method was used to prepare both ZnO and ZnO/CNTs films, with CNTs first prepared using the chemical vapor deposition method (CVD). The chemical structure and optical analyses for all the prepared nanomaterials were performed using X-ray diffraction (XRD), Fourier transformer infrared spectroscopy (FTIR), and UV/Vis spectrophotometer devices, respectively. According to the XRD analysis, the crystal sizes of ZnO and ZnO/CNTs were approximately 50.4 and 65.2 nm, respectively. CNTs have average inner and outer diameters of about 3 and 13 nm respectively, according to the transmitted electron microscope (TEM), and a wall thickness of about 5 nm. The detection of CO2 is accomplished by passing varying rates of the gas from 30 to 150 sccm over the prepared thin-film electrodes. At 150 sccm, the sensitivities of ZnO and ZnO/CNTs sensors are 6.8% and 22.4%, respectively. The ZnO/CNTs sensor has a very stable sensitivity to CO2 gas for 21 days. Moreover, this sensor has a high selectivity to CO2 in comparison with other gases, in which the ZnO/CNTs sensor has a higher sensitivity to CO2 compared to H2 and C2H2.

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Nanomaterials for Sensing Applications: Introduction and Perspective

Cited by 16 publications

References 176 publications

Pushing the Limits of Rapid Anodic Growth of CuO/Cu(OH)₂Nanoneedles on Cu for the Methanol Oxidation Reaction: Anodization pH Is the Game Changer

Pushing the Limits of Rapid Anodic Growth of CuO/Cu(OH)₂Nanoneedles on Cu for the Methanol Oxidation Reaction: Anodization pH Is the Game Changer

Carbon Nanostructures, Nanolayers, and Their Composites

Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature

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Nanomaterials for Sensing Applications: Introduction and Perspective

Cited by 16 publications

References 176 publications

Pushing the Limits of Rapid Anodic Growth of CuO/Cu(OH)2Nanoneedles on Cu for the Methanol Oxidation Reaction: Anodization pH Is the Game Changer

Pushing the Limits of Rapid Anodic Growth of CuO/Cu(OH)2Nanoneedles on Cu for the Methanol Oxidation Reaction: Anodization pH Is the Game Changer

Carbon Nanostructures, Nanolayers, and Their Composites

Fabrication of ZnO/CNTs for Application in CO2 Sensor at Room Temperature

Contact Info

Product

Resources

About

Pushing the Limits of Rapid Anodic Growth of CuO/Cu(OH)₂Nanoneedles on Cu for the Methanol Oxidation Reaction: Anodization pH Is the Game Changer

Pushing the Limits of Rapid Anodic Growth of CuO/Cu(OH)₂Nanoneedles on Cu for the Methanol Oxidation Reaction: Anodization pH Is the Game Changer