Effect of precursor chemistry on the structural and sensing properties of hydrothermally grown nanorods

Yadav, Aniruddh Bahadur; Parvathi, Padidepu V. L.; Thabassum, Shaik Ruba

doi:10.1007/s00339-019-2740-4

Cited by 13 publications

(9 citation statements)

References 28 publications

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“…This technology provides rather good control over the ZnO nanostructure morphology via seeding clusters and managing the growth temperature. Therefore, various investigations dealt with ZnO NRs fabricated in frames of hydrothermal technology to develop prototypes of sensors for detecting many gases ranged from rather simple inorganic ones like carbon dioxide [28], methane [29], nitrogen oxides [30,31,32], humidity [33], hydrogen [34,35,36], to complex organic molecules like ethanol [36,37,38,39,40,41,42,43], acetone [44,45], drugs [46] and glucose [47]. As shown in the cited literature, such ZnO NRs appear to be promising gas-sensing material for chemiresistors to detect the gases mostly at tens or hundreds of ppm concentrations in a mixture with background air.…”

Section: Introductionmentioning

confidence: 99%

The Multisensor Array Based on Grown-On-Chip Zinc Oxide Nanorod Network for Selective Discrimination of Alcohol Vapors at Sub-ppm Range

Bobkov

Varezhnikov

Plugin

et al. 2019

Sensors

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We discuss the fabrication of gas-analytical multisensor arrays based on ZnO nanorods grown via a hydrothermal route directly on a multielectrode chip. The protocol to deposit the nanorods over the chip includes the primary formation of ZnO nano-clusters over the surface and secondly the oxide hydrothermal growth in a solution that facilitates the appearance of ZnO nanorods in the high aspect ratio which comprise a network. We have tested the proof-of-concept prototype of the ZnO nanorod network-based chip heated up to 400 °C versus three alcohol vapors, ethanol, isopropanol and butanol, at approx. 0.2–5 ppm concentrations when mixed with dry air. The results indicate that the developed chip is highly sensitive to these analytes with a detection limit down to the sub-ppm range. Due to the pristine differences in ZnO nanorod network density the chip yields a vector signal which enables the discrimination of various alcohols at a reasonable degree via processing by linear discriminant analysis even at a sub-ppm concentration range suitable for practical applications.

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Section: Introductionmentioning

confidence: 99%

The Multisensor Array Based on Grown-On-Chip Zinc Oxide Nanorod Network for Selective Discrimination of Alcohol Vapors at Sub-ppm Range

Bobkov

Varezhnikov

Plugin

et al. 2019

Sensors

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“…The accurate composition mixture of AuNP dispersed in ZnO seed solution is able to materialize a fascinating and perfect symmetric of rose shape (rosette) thin‐film structure. [ 26 ] The effect of the concentration of AuNP was further investigated to observe the progression and changes in the rosette thin film structure. From Figure 3A‐D, the most optimum compositional ratio of Au into ZnO seed solution is 5:100.…”

Section: Resultsmentioning

confidence: 99%

Spiked nanorosette: A novel zinc oxide‐gold textured nanostructure for impedance biosensing of target DNA signatures

Haarindraprasad

Devi

Thevendran

et al. 2023

Biotechnology Journal

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The creation of nanostructure is profound for the generation of nanobiosensors in several medical diagnosis. Here, we employed an aqueous hydrothermal route using Zinc‐oxide (ZnO) and Gold (Au), which under optimal conditions formed an ultra‐crystalline rose‐like nanostructure textured with nanowires on the surface, coined as "spiked nanorosette." The spiked nanorosette structures was further characterized to possess crystallites of ZnO and Au grains with average sizes of 27.60 and 32.33 nm, respectively. The intensity for both ZnO (002) and Au (111) planes of the nanocomposite was inferred to be controlled by fine‐tuning the percentage of Au nanoparticles doped in the ZnO/Au matrix, as referred by X‐ray diffraction analysis. The formation of ZnO/Au‐hybrid nanorosettes were additionally verified by the distinct corresponding peaks from photoluminescence and X‐ray photoelectron spectroscopy, supported by electrical validations. The biorecognition properties of the spiked nanorosettes were also examined using custom targeted and non‐target DNA sequences. The DNA targeting capabilities of the nanostructures were analyzed by Fourier Transform Infrared and electrochemical impedance spectroscopy. The fabricated nanowire‐embedded nanorosette exhibited a detection limit at the lower picomolar range of 1 × 10−12 M, with high selectivity, stability and reproducibility and good linearity, under optimal conditions. Impedance‐based techniques are more sensitive to the detection of nucleic acid molecule whereas this novel spiked nanorosette demonstrate promising attributes as excellent nanostructures for nanobiosensor developments and their potential future application for nucleic‐acids or disease diagnostics.

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“…However, to the best of our knowledge, most studies are concentrated on the control of the ZnO nanorods size, few reports are interested to the ZnO nanostructure morphology control. Yadav et al [26] have reported the effect of zinc salt precursor nature (zinc acetate and zinc nitrate) on ZnO nanorods and their sensing properties and UV detection. [27] In this study, we investigated the effect of the concentration of nitrate salt precursor on the shape of ZnO nanostructures prepared by hydrothermal method.…”

Section: Introductionmentioning

confidence: 99%

Effect of Zinc Nitrate Concentration on the Morphology of ZnO Nanostructures Grown by Hydrothermal Method

Al-Rasheedi

Alonizan

Aida

2023

Physica Status Solidi (a)

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Effect of precursor chemistry on the structural and sensing properties of hydrothermally grown nanorods

Cited by 13 publications

References 28 publications

The Multisensor Array Based on Grown-On-Chip Zinc Oxide Nanorod Network for Selective Discrimination of Alcohol Vapors at Sub-ppm Range

The Multisensor Array Based on Grown-On-Chip Zinc Oxide Nanorod Network for Selective Discrimination of Alcohol Vapors at Sub-ppm Range

Spiked nanorosette: A novel zinc oxide‐gold textured nanostructure for impedance biosensing of target DNA signatures

Effect of Zinc Nitrate Concentration on the Morphology of ZnO Nanostructures Grown by Hydrothermal Method

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