Skip to content

Research at St Andrews

Formation mechanisms of ZnO spherulites and derivatives

Research output: Contribution to journalArticle

DOI

Open Access Status

  • Embargoed (until 3/12/19)

Author(s)

Bethany Connolly, Heather F. Greer, Wuzong Zhou

School/Research organisations

Abstract

ZnO microparticles have been solvothermally synthesized from zinc acetate and formic acid. The resulting microspherulites consist of radially arranged nanorods which undergo a range of re-crystallisation pathways to produce particles with different terminal morphologies. Crystallisation on the particle surface results in hex-agonal microdisc decorated hierarchical microspheres. These particles expose only the (0001) crystallographic plane of ZnO and further develop into a sea-urchin like morphology, when the microdiscs grow up along the [0001] direction into hexagonal microrods. Alternatively, crystallisation of the particle core into a ZnO plate, facilitates asymmetric assembly of nanocrystallites, forming a hexagonal cone on one side of the plate. The particle has a mushroom-like terminal morphology. When simultaneous surface and core re-crystallisation takes place, wood gyro-shaped particles are observed, in which all the surface discs face a single direction. The microstructures of the particles were investigated using XRD, electron microscopy and surface colouring with adsorbed charged dyes. Structural studies of the early growth stages and subsequent morphology evolution support a dipole field driven formation mechanism. This work offers an improved understanding of the for-mation of other spherulites, in particular, naturally occurring mineral calcium carbonate spherulites.
Close

Details

Original languageEnglish
Pages (from-to)249-257
Number of pages9
JournalCrystal Growth & Design
Volume19
Issue number1
Early online date3 Dec 2018
DOIs
Publication statusPublished - 2 Jan 2019

Discover related content
Find related publications, people, projects and more using interactive charts.

View graph of relations

Related by author

  1. The active oxygen species promoted catalytic oxidation of 5-hydroxymethyl-2-furfural on facet-specific Pt nanocrystals

    Liu, Y., Ma, H-Y., Lei, D., Lou, L-L., Liu, S., Zhou, W., Wang, G-C. & Yu, K., 6 Sep 2019, In : ACS Catalysis. 9, 9, p. 8306-8315

    Research output: Contribution to journalArticle

  2. Experimental and theoretical investigations of Cs+ adsorption on crown ethers modified magnetic adsorbent

    Liu, Z., Zhou, Y., Guo, M., Lv, B., Wu, Z. & Zhou, W., 5 Jun 2019, In : Journal of Hazardous Materials . 371, p. 712-720

    Research output: Contribution to journalArticle

  3. Towards new thermoelectrics: tin selenide/modified graphene oxide nanocomposites

    Protsak, I., Champet, S., Chiang, C-Y., Zhou, W., Popuri, S., Bos, J-W., Misra, D., Morozov, Y. & Gregory, D., 31 Mar 2019, In : ACS Omega. 4, 3, p. 6010-6019 10 p.

    Research output: Contribution to journalArticle

  4. Growth and growth mechanism of oxide nanocrystals on electrochemically exfoliated graphene for lithium storage

    Xu, Z., Zhang, P., Chen, J., Yue, W. & Zhou, W., Mar 2019, In : Energy Storage Materials. 18, p. 174-181

    Research output: Contribution to journalArticle

  5. Rapid synthesis of BiOBrxI1-x photocatalysts: insights to the visible-light photocatalytic activity and strong deviation from Vegard’s Law

    Kong, L., Guo, J., Makepeace, J. W., Xiao, T., Greer, H. F., Zhou, W., Jiang, Z. & Edwards, P. P., 11 Feb 2019, In : Catalysis Today. In press

    Research output: Contribution to journalArticle

Related by journal

  1. Enhancement of electrical conductivity due to structural distortion from linear to nonlinear dicarboxylato-bridged Zn(II) 1D-coordination polymers

    Naskar, K., Sil, S., Sahu, N., Dutta, B., Slawin, A. M. Z., Ray, P. P. & Sinha, C., 1 May 2019, In : Crystal Growth & Design. 19, 5, p. 2632-2641 10 p.

    Research output: Contribution to journalArticle

  2. Evolution of anodic product from molybdenum metal in absolute ethanol and humidity sensing under ambient conditions

    Ni, C., Carolan, D., Hui, J., Rocks, C., Padmanaban, D., Ni, J., Xie, D., Fang, Z., Irvine, J., Maguire, P. & Mariotti, D., 4 Sep 2019, In : Crystal Growth & Design. 19, 9, p. 5249-5257 9 p.

    Research output: Contribution to journalArticle

  3. Structural diversity in tetrakis(4-pyridyl)porphyrin supramolecular building blocks

    Mishra, M. K., Choudhary, H., Cordes, D. B., Kelley, S. & Rogers, R., 5 Jun 2019, In : Crystal Growth & Design. 19, 6, p. 3529-3542

    Research output: Contribution to journalArticle

  4. The characteristics and biological relevance of inorganic amorphous calcium carbonate (ACC) precipitated from seawater

    Evans, D., Webb, P. B., Penkman, K., Kroger, R. & Allison, N., 7 Aug 2019, In : Crystal Growth & Design. 19, 8, p. 4300-4313

    Research output: Contribution to journalArticle

ID: 257021712

Top