Precise control of water content on the growth kinetics of ZnO quantum dots

Chen, Zheming; Han, Chunchun; Wang, Feng; Gao, Chong; Liu, Peng; Ding, Yanfen; Zhang, Shimin; Yang, Mingshu

doi:10.1016/j.jcrysgro.2019.01.039

Cited by 6 publications

(3 citation statements)

References 36 publications

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“…In this method, first, a precursor solution of zinc salt (mostly zinc acetate) was formed in dehydrated ethanol and then to produce QDs from it, a calculated amount of water was added. Chen and his group 62 studied the effect of the water content on the growth kinetics of ZnO QDs. The focus of these studies was on the two main processes, i.e.…”

Section: Synthetic Approachmentioning

confidence: 99%

Journey of ZnO quantum dots from undoped to rare-earth and transition metal-doped and their applications

Singh

2021

RSC Adv.

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Section: Synthetic Approachmentioning

confidence: 99%

Journey of ZnO quantum dots from undoped to rare-earth and transition metal-doped and their applications

Singh

2021

RSC Adv.

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“…The bandgap energy of various ZnO samples might be affected by UV-visible spectroscopy absorbance spectra as shown in Figure 6. Since ZnO are direct bandgap semiconductors, their optical absorption edge and bandgap energy meet the following equation [31][32]:…”

Section: Optical Propertiesmentioning

confidence: 99%

Synthesis, Characterization, and Study of the Photocatalytic Activity upon Polymeric-Surface Modification of ZnO Nanoparticles

Mir,

Becheikh,

Khezami

et al. 2023

Eng. Technol. Appl. Sci. Res.

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In this study, ZnO nanoparticles were successfully synthesized through a sol-gel route using zinc acetate precursor, polymer N-Vinylpyrrolidone (PVP), Cetyl Trimethyl Ammonium Bromide (CTAB), and Poly-Ethylene Glycol (PEG). The nanoparticles were examined with Crystal Violet (CV) dye photodegradation under UV irradiation. The addition of polymers controlled size, shape, and morphology of the particles and reduced the formation of agglomerates. The size and crystallinity of polymer/ZnO nanoparticles were analyzed using X-Ray Diffraction (XRD). UV-visible spectroscopy was used to study the optical properties and bandgap of the nanoparticles, while nitrogen adsorption-desorption isotherms were used to analyze their pore structure and surface area. XRD showed that all the lattice constants changed and the bandgap energy declined with the addition of polymers, which can be attributed to the improvement in crystallinity of the polymer specimens. The ZnO bandgap can be tuned in the range of 3.29, 3.251, 3.275, and 3.254 eV, using pure ZnO, CTAB, PEG, and PVP, respectively. All obtained BET isotherms can be classified as type II isotherms, characteristic of nanoporous material. ZnO-pure has high photocatalytic efficiency (69.66%), which was significantly decreased after the surface of the ZnO nanoparticles was capped with PVP (43.16%), PEG (19.82%), and CTAB (14.36%). On the same surface, the catalytic activity of ZnO-PVP was improved by 28% compared to pure ZnO, with a photodegradation efficiency of 97%.

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“…Ligand free (water) "1 + 1" mixed OA + OR 2003 [72] Nano ZnS Mercaptoethanol "1 + 1" sequential OA + OR 2003 [70] Nano ZnS NaOH "i + j" sequential OA + OR 2006 [66], 2007 [73] Thiol-capped PbS NPs Ligand free (water) "i + j" OA and "1 + 1" OA + OR 2007 [74] SnO 2 NPs Ligand free (water) "i + j" OA 2006 [75], 2009 [76] CdS nanorods Amine "i + j" OA 2010 [77] TiO 2 anatase NPs Succinic acid "1 + 1" OA, shrinkage, and OR 2010 [78] TGA-capped CdTe NPs Ligand free (water) "1 + 1" mixed OA + OR 2011 [79] ZnO QDs Ethanol "1 + 1" sequential OA + OR 2012 [80] CdS QDs TGA "1 + 1" mixed OA + OR 2013 [81] CdTe QDs Mercaptopropionic acid "1 + 1" mixed OA + OR 2014 [82] Co 2 FeO 4 Polypeptide (c25-mms6) "1 + 1" sequential OA + OR 2014 [83] Gd 2 O 3 nanorods Ligand free (water) "1 + 1" OA 2016 [84] ZnO QDs Ligand free (water) "1 + 1" mixed OA + OR 2019 [85] Table 1.…”

Section: Nano Znsmentioning

confidence: 99%

Ultrathin Metal Hydroxide/Oxide Nanowires: Crystal Growth, Self-Assembly, and Fabrication for Optoelectronic Applications

Pathiraja¹,

Rathnayake²

2022

21st Century Nanostructured Materials - Physics, Chemistry, Classification, and Emerging Applications in Industry, Biomedicine,

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The fundamental understanding of transition metal oxides nanowires’ crystal growth to control their anisotropy is critical for their applications in miniature devices. However, such studies are still in the premature stage. From an industrial point of view, the most exciting and challenging area of devices today is having the balance between the performance and the cost. Accordingly, it is essential to pay attention to the controlled cost-effective and greener synthesis of ultrathin TMOS NWs for industrial optoelectronic applications. This chapter provides a comprehensive summary of fundamental principles on the preperation methods to make dimensionality controlled anisotropic nanowires, their crystal growth studies, and optical and electrical properties. The chapter particularly addresses the governing theories of crystal growth processes and kinetics that controls the anisotropy and dimensions of nanowires. Focusing on the oriented attachment (OA) mechanism, the chapter describes the OA mechanism, nanocrystal’s self-assembly, interparticle interactions, and OA-directed crystal growth to improve the state-of-the art kinetic models. Finally, we provide the future perspective of ultrathin TMOS NWs by addressing their current challenges in optoelectronic applications. It is our understanding that the dimension, and single crystallinity of nanowires are the main contributors for building all functional properties, which arise from quasi-1-D confinement of nanowire growth.

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Precise control of water content on the growth kinetics of ZnO quantum dots

Cited by 6 publications

References 36 publications

Journey of ZnO quantum dots from undoped to rare-earth and transition metal-doped and their applications

Journey of ZnO quantum dots from undoped to rare-earth and transition metal-doped and their applications

Synthesis, Characterization, and Study of the Photocatalytic Activity upon Polymeric-Surface Modification of ZnO Nanoparticles

Ultrathin Metal Hydroxide/Oxide Nanowires: Crystal Growth, Self-Assembly, and Fabrication for Optoelectronic Applications

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