Morphology‐controlled seed‐assisted hydrothermal ZnO nanowires via critical concentration for nucleation and their photoluminescence properties. Issue 2 (16th September 2014)

• Record Type: Journal Article
• Authors: Kasamechonchung, Panita; Horprathum, Mati; Boonpavanitchakul, Kanittha; Supaka, Nuttapun; Prompinit, Panida; Kangwansupamonkon, Wiyong; Somboonkaew, Armote; Wetcharungsri, Jutaphet; Pratontep, Sirapat; Porntheeraphat, Supanit; Klamchuen, Annop
• Is Part Of: Physica status solidi. Volume 212:Issue 2(2015:Feb.)
• Page Start: 394
• Page End: 400
• Publication Date: 2014-09-16
• Subjects: Solid state physics -- Periodicals; Solids -- Industrial applications -- Periodicals; 530.41
• DOI: 10.1002/pssa.201431479
• Languages: English
• ISSNs: 1862-6300

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="pssa201431479-sec-0001" sec-type="section"> <p>Here we demonstrate the controllability on morphology of hydrothermal ZnO nanowires through the critical concentration for nucleation. When Zn ion concentration is relatively low, the nucleation process preferentially occurs on the (0001) plane, promoting nanowire growth. In contrast, for relatively high Zn ion concentration, the (<inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgh3t3q8tm9" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:18626300:media:pssa201431479:pssa201431479-math-0001" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>10</mml:mn><mml:mover accent="true"><mml:mn>1</mml:mn><mml:mo>¯</mml:mo></mml:mover><mml:mn>0</mml:mn></mml:mrow></mml:math></alternatives></inline-formula>) plane emerges, suppressing nanowire growth. The occurrence of this nucleation competition on the crystal planes as a function of concentration is caused by differences in the critical nucleation sizes between the (0001) plane and the (<inline-formula><alternatives><inline-graphic mimetype="image" xlink:href="ark:/27927/pgh3t3q8tnv" xlink:type="simple" xmlns:xlink="http://www.w3.org/1999/xlink" /><mml:math altimg="urn:x-wiley:18626300:media:pssa201431479:pssa201431479-math-0002" display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mn>10</mml:mn><mml:mover accent="true"><mml:mn>1</mml:mn><mml:mo>¯</mml:mo></mml:mover><mml:mn>0</mml:mn></mml:mrow></mml:math></alternatives></inline-formula>) plane. Furthermore, we found that the density of ZnO nanowires trend to decrease with increasing the growth time due to the lateral growth effect. Photoluminescence measurement of ZnO nanowires exhibited that the near band emission peak of 380 nm decreased with decreasing nanowire diameter while the broad emission peak below band gap appears the opposite trend because of surface to volume ratio effect.</p> </sec> </abstract>