Carbon nanotube-ZnO nanowire hybrid architectures as multifunctional devices

Singh, Lovepreet; Sugavaneshwar, Ramu Pasupathi

doi:10.1063/1.4817837

Cited by 14 publications

(13 citation statements)

References 38 publications

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“…Deconvoluted C 1s XPS spectrum (Figure 2C) shows three peaks at 284.4 eV, 286.1 eV and 288.8 eV. The binding energy at 284.4 eV is assigned to the graphitic CC bond in the graphene sheets of the carbon nanotubes 30, 33. The peak at 286.1 eV is ascribed to the CO bond, while the peak at 288.8 eV is assigned to the OCO bond 33,34.…”

Section: Resultsmentioning

confidence: 99%

A Zinc Oxide Carbon Nanotube Based Sensor for In Situ Monitoring of Hydrogen Peroxide in Swimming Pools

et al. 2015

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Zinc oxide nanoparticles were tethered to carbon nanotubes to form an electrochemical sensing composite, which was characterized using transmission electron microscopy, and X‐ray photoelectron and attenuated total reflectance infrared spectroscopies. The sensor′s electrocatalytic response for measuring hydrogen peroxide was investigated using cyclic voltammetry and chronoamperometry in a dynamic, well defined swimming pool environment. A wide, linear response in the concentration range of 0.025–7.0 mM at a potential of −0.360 V was shown, with rapid response time (<5 s). The sensor had excellent reproducibility, exhibited stability and selectivity, and was able to measure concentrations in a dynamic environment as they varied.

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Section: Resultsmentioning

confidence: 99%

A Zinc Oxide Carbon Nanotube Based Sensor for In Situ Monitoring of Hydrogen Peroxide in Swimming Pools

et al. 2015

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“…surface-to-volume ratio and light scattering (41)(42)(43)(44). The generation of a photocurrent in ZnO NWs is attributed to mainly two factors (1) the generation of electrons and holes due to photoabsorption and (2) a surface-related mechanism involving oxygen adsorption and desorption (8,(45)(46)(47)(48). The second one has been cited for photoconduction of ZnO in most of the cases.…”

Section: 2zno Nws Hybrid Structures For Photodetector Devicesmentioning

confidence: 99%

Effects of nanoscale morphology and defects in oxide: optoelectronic functions of zinc oxide nanowires

Nagao

Dao

Sugavaneshwar

et al. 2016

Radiation Effects and Defects in Solids

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Oxide nanomaterials have been attracting growing interest for both fundamental research and industrial applications ranging from gas sensors, light-emitting devices, to photocatalysts, and solar cells. The optical and electronic properties of oxide nanomaterials are strongly dependent on their surface morphologies as well as defects, such as surface areas, aspect ratios, foreign atom impurities, and oxygen vacancies. In this review, we describe some examples of our recent contributions to the nanomaterials and devices that exhibit remarkable functionalities based on one-dimensional nanostructures of ZnO and their hetero junctions as well as their variants with appropriately incorporated dopants

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“…E c for ZnO is positioned at −3.9 eV ( Figure 1 a), which resides outside the cellular redox potential range of −4.12 eV to –4.84 eV [ 161 ]. When conjugated with carbonaceous nanomaterials, e.g., CNTs or graphene, the excellent charge transfer and separation characteristics of carbonaceous nanomaterial causes band-bending of ZnO toward the CNT/graphene work function (−4.3 to −5.0 eV), as shown in Figure 1 b [ 163 , 164 ]. Such band-edge movement causes the overlap of the E c position with the cellular redox potential, thus likely causing increased photocatalytic activity, ROS generation and cytotoxicity from ZnO-graphene NHs [ 132 , 165 ].…”

Section: Key Properties Relevant To Toxicitymentioning

confidence: 99%

Emergent Properties and Toxicological Considerations for Nanohybrid Materials in Aquatic Systems

et al. 2014

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Conjugation of multiple nanomaterials has become the focus of recent materials development. This new material class is commonly known as nanohybrids or "horizon nanomaterials". Conjugation of metal/metal oxides with carbonaceous nanomaterials and overcoating or doping of one metal with another have been pursued to enhance material performance and/or incorporate multifunctionality into nano-enabled devices and processes. Nanohybrids are already at use in commercialized energy, electronics and medical products, which warrant immediate attention for their safety evaluation. These conjugated ensembles likely present a new set of physicochemical properties that are unique to their individual component attributes, hence increasing uncertainty in their risk evaluation. Established toxicological testing strategies and enumerated underlying mechanisms will thus need to be re-evaluated for the assessment of these horizon materials. This review will present a critical discussion on the altered physicochemical properties of nanohybrids and analyze the validity of existing nanotoxicology data against these unique properties. The article will also propose strategies to evaluate the conjugate materials' safety to help undertake future toxicological research on the nanohybrid material class.

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Carbon nanotube-ZnO nanowire hybrid architectures as multifunctional devices

Cited by 14 publications

References 38 publications

A Zinc Oxide Carbon Nanotube Based Sensor for In Situ Monitoring of Hydrogen Peroxide in Swimming Pools

A Zinc Oxide Carbon Nanotube Based Sensor for In Situ Monitoring of Hydrogen Peroxide in Swimming Pools

Effects of nanoscale morphology and defects in oxide: optoelectronic functions of zinc oxide nanowires

Emergent Properties and Toxicological Considerations for Nanohybrid Materials in Aquatic Systems

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