Hydrothermal selective growth of low aspect ratio isolated ZnO nanorods

Hassanpour, Amir; Bogdan, Nicoleta; Capobianco, John A.; Bianucci, Pablo

doi:10.1016/j.matdes.2017.01.089

Cited by 42 publications

(26 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Depending upon morphology, ZnO has vast area of application in electronics [7] , sensing [8] , magnetic [9] , catalytic [10] , and solar cell devices [11] . Several research groups have synthesized ZnO nanostructures that include nanowires, nanotubes, nanobelts, nanorods by different available methods such as physical and chemical deposition method [6] , spray pyrolysis [12] , sol-gel method [13] , and hydrothermal method [14] . These studies envisage that ZnO nanostructure growth morphology is strongly influenced by the route chosen for synthesis and surrounding environment of the process [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Structural and electronic investigation of ZnO nanostructures synthesized under different environments

Bhardwaj

Bharti

Singh

et al. 2018

Heliyon

View full text Add to dashboard Cite

An explicit study of comparison on the basis of structure and electronic properties of ZnO nanostructures was discussed. ZnO synthesized by sol-gel and hydrothermal method without using any surfactant leads to the formation of two different morphologies. Rietveld crystal structure refinement of X-ray diffraction patterns confirmed the wurtzite structure of both samples. Raman spectra also confirmed the wurtzite phase formation and improved crystallinity in sample synthesized by hydrothermal route that are concurrent with results obtained from X-ray diffraction. Field-emission scanning electron microscopy revealed the formation of ZnO spherical nanoparticle structure for sol-gel method and flower like μ-structure for ZnO prepared through hydrothermal route. Williamson-Hall equations applied to study the strain and stress parameters present in the material, show the decrease in their values as the crystal size increases. Energy band gap is calculated using diffused reflectance spectroscopy. Near-edge X-ray absorption fine-structure measurements at O K- and Zn L3,2- edges simulated with FEFF9.05 code confirmed the presence of oxygen vacancies. Further extended x-ray absorption fine-structure revealed a similar local atomic structure for both samples despite having different morphologies.

show abstract

Section: Introductionmentioning

confidence: 99%

Structural and electronic investigation of ZnO nanostructures synthesized under different environments

Bhardwaj

Bharti

Singh

et al. 2018

Heliyon

View full text Add to dashboard Cite

show abstract

“…This approach offers simplest preparation set-up, least energy consuming and low production cost where the ZnO nanorod can be grown under mild synthesis condition (such as normal pressure and low growth temperature), simple facility, good repeatability and high reliability (Gao et al 2010;Ismail et al 2016;Zhang et al 2019). ZnO seed layer is needed in order to grow ZnO nanorod/nanowire using hydrothermal method (Cheng et al 2016;Hassanpour et al 2017;Park et al 2016). Usually, ZnO seed layer are prepared using zinc acetate dehydrate as the precursor (Greene et al 2005;Park et al 2016;.…”

Section: Growth Of Zinc Oxide Nanorod Using Hydrothermal Methodsmentioning

confidence: 99%

“…Different precursors may result in different morphology and shape which may be attributed to different reaction pathways, solubility of the precursor, and basicity of the solution which influenced the crystal nucleation and growth of ZnO nanorod (Yun et al 2010). Moreover, it can be predicted that the diameter of nanorod strongly depends on diameter of seed and the length of nanorod depends on the growth time and temperature (Hassanpour et al 2017;Jeong et al 2011;Park et al 2016;Yu et al 2017). Additive of ethylene glycol (EG) assists the crystal of ZnO nanorod to grow homogenously attributed to its good dispersibility and glutinosity (Long et al 2008).…”

Section: Growth Of Zinc Oxide Nanorod Using Hydrothermal Methodsmentioning

confidence: 99%

Recent Progress on Fabrication of Zinc Oxide Nanorod-based Field Effect Transistor Biosensors

Karim¹,

Chang²,

Majlis³

et al. 2019

JSM

View full text Add to dashboard Cite

Zinc oxide is a unique n-type semiconducting material, owing to wide bandgap of ~3.37 eV, non-toxic, bio-safe and biocompatible with high isoelectric point of ~9.5, make it as promising biomaterial to be utilized as sensing matrix in biosensor applications. In addition, ZnO that possess high electron affinity provide a good conduction pathway for the electrons hence result in significant electrical signal change upon detection to target biomolecules. Moreover, high surface area of ZnO nanorod enhance immobilization of enzymes, hence, increase the device performance. Field effect transistor (FET)-based biosensor offer simplicity in handling and label-free, has also become research topic among researchers for novel biosensor development. This review aims to explore the preparation of ZnO nanorod using hydrothermal method and investigate the fabrication of ZnO nanorod-based FET biosensor. Thus, contribute to enhance understanding towards biosensor development for health monitoring, especially based on FETs structure devices.

show abstract

“…The surface coverage (Г) can be considered as a constant due to the same bulk dopamine concentration for three morphologies of MnO 2 . Nanorods and nanowires are generally distinguished by their length-to-diameter (l/d) ratio [46,47]. Nanomaterials with l/d ratio of 1-10, diameter (d) less than 100 nm, and length (l) less than 1000 nm are often defined as nanorods.…”

Section: Spatial Models For Various Morphologies Of Nano-mnomentioning

confidence: 99%

Morphologically Tunable MnO2 Nanoparticles Fabrication, Modelling and Their Influences on Electrochemical Sensing Performance toward Dopamine

Liu

et al. 2018

Catalysts

View full text Add to dashboard Cite

Abstract:The morphology or shape of nanomaterials plays an important role in functional applications, especially in the electrochemical sensing performance of nanocomposites modified electrodes. Herein, the morphology-dependent electrochemical sensing properties of MnO 2 -reduced graphene oxide/glass carbon electrode (MnO 2 -RGO/GCE) toward dopamine detection were investigated. Firstly, various morphologies of nanoscale MnO 2 , including MnO 2 nanowires (MnO 2 NWs), MnO 2 nanorods (MnO 2 NRs), and MnO 2 nanotubes (MnO 2 NTs), were synthesized under different hydrothermal conditions. Then the corresponding MnO 2 -RGO/GCEs were fabricated via drop-casting and the subsequent electrochemical reduction method. The oxidation peak currents increase with the electrochemical activity area following the order of MnO 2 NWs-RGO/GCE, MnO 2 NTs-RGO/GCE, and MnO 2 NRs-RGO/GCE. The spatial models for MnO 2 NWs, MnO 2 NTs, and MnO 2 NRs are established and accordingly compared by their specific surface area, explaining well the evident difference in electrochemical responses. Therefore, the MnO 2 NWs-RGO/GCE is selected for dopamine detection due to its better electrochemical sensing performance. The response peak current is found to be linear with dopamine concentration in the range of 8.0 × 10 −8 mol/L-1.0 × 10 −6 mol/L and 1.0 × 10 −6 mol/L-8.0 × 10 −5 mol/L with a lower detection limit of 1 × 10 −9 mol/L (S/N = 3). Finally, MnO 2 NWs-RGO/GCE is successfully used for the determination of dopamine injection samples, with a recovery of 99.6-103%. These findings are of great significance for understanding the relationship between unlimited nanoparticle structure manipulation and performance improvement.

show abstract

Hydrothermal selective growth of low aspect ratio isolated ZnO nanorods

Cited by 42 publications

References 61 publications

Structural and electronic investigation of ZnO nanostructures synthesized under different environments

Structural and electronic investigation of ZnO nanostructures synthesized under different environments

Recent Progress on Fabrication of Zinc Oxide Nanorod-based Field Effect Transistor Biosensors

Morphologically Tunable MnO2 Nanoparticles Fabrication, Modelling and Their Influences on Electrochemical Sensing Performance toward Dopamine

Contact Info

Product

Resources

About