Open AccessCharacteristics of controllable‐shape well‐aligned zinc oxide nanorods synthesised by microwave‐assisted heating
Author(s) -
Tsai M.K.,
Huang W.,
Hu S.Y.,
Lee YuehChien,
Lee J.W.,
Lee M.H.,
Shen J.L.
Publication year - 2015
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2015.0270
Subject(s) - nanorod , materials science , hexamethylenetetramine , zinc , photoluminescence , scanning electron microscope , zinc nitrate , substrate (aquarium) , chemical engineering , silicon , raman spectroscopy , nanotechnology , optoelectronics , optics , composite material , metallurgy , oceanography , physics , geology , engineering
A microwave‐assisted heating method for growing well‐aligned zinc oxide (ZnO) nanorods on the ZnO/silicon (Si) substrate is developed. For ZnO nanorods growth, a thin ZnO seed layer was deposited on an Si substrate by sputtering technique. The ZnO nanorods grown on the ZnO/Si substrate were synthesised in aqueous solution mixed with zinc nitrate hexahydrate and hexamethylenetetramine (HMTA) under microwave heating. The scanning electron microscopy (SEM) images and X‐ray diffraction results exhibit that the ZnO nanorods with hexagonal phase, single crystalline, and highly oriented along (002) plane are obtained successfully. SEM images also show that the morphology and diameter of the synthesised ZnO nanorods can be controlled by adjusting the molar ratio of Zn(NO 3 ) 2 ·6H 2 O to HMTA. The Raman scattering results evidence the vertical well‐aligned ZnO nanrods with larger diameter are strain‐free. The investigations of the photoluminescence spectra suggest that the ultraviolet emission peak of the synthesised ZnO nanorods depending on its controllable diameter would be applicable for various nanodevice fabrications.