scholarly journals Photoluminescence Study of the Influence of Additive Ammonium Hydroxide in Hydrothermally Grown ZnO Nanowires

2018 ◽  
Vol 13 (1) ◽  
Author(s):  
A. S. Dahiya ◽  
S. Boubenia ◽  
G. Franzo ◽  
G. Poulin-Vittrant ◽  
S. Mirabella ◽  
...  
Keyword(s):  
Ammonium Hydroxide ◽  
Zno Nanowires ◽  
Photoluminescence Study

scholarly journals Photoluminescence Study of the Influence of Additive Ammonium Hydroxide in Hydrothermally Grown ZnO Nanowires

2018 ◽  
Author(s):  
Abhishek Dahiya ◽  
Sarah Boubenia ◽  
Franzò Giorgia ◽  
Guylaine Poulin-Vittrant ◽  
Salvatore Mirabella ◽  
...  
Keyword(s):  
Experimental Study ◽  
Zinc Oxide ◽  
Point Defects ◽  
Hydrothermal Process ◽  
Ammonium Hydroxide ◽  
Optical Response ◽  
Zno Nanowires ◽  
Growth Solution ◽  
Photoluminescence Study ◽  
Order Of Magnitude

We report the influence of ammonium hydroxide (NH4OH), as growth additive, on zinc oxide nanomaterial through the optical response obtained by photoluminescence (PL). A low-temperature hydrothermal process is employed for the growth of ZnO nanowires (NWs) on seedless Au surface. A more than two order of magnitude change in ZnO NW density is demonstrated via careful addition of NH4OH in the growth solution. Further, we show by systematic experimental study and PL characterization data that the addition of NH4OH can degrade the optical response of ZnO NWs produced. The increase of growth solution basicity with the addition of NH4OH may slowly degrade the optical response of NWs by slowly etching its surfaces, increasing the point defects in ZnO NWs. The present study demonstrates the importance of growth nutrients to obtain quality controlled density tunable ZnO NWs on seedless conducting substrates.

Photoluminescence study of ZnO nanowires with Zn residue

2013 ◽  
Vol 136 ◽  
pp. 26-31 ◽  
Author(s):  
Sachin D. Kshirsagar ◽  
Ummar Pasha Shaik ◽  
M. Ghanashyam Krishna ◽  
Surya P. Tewari
Keyword(s):  
Zno Nanowires ◽  
Photoluminescence Study

scholarly journals Photoluminescence study of basal plane stacking faults in ZnO nanowires

2014 ◽  
Vol 439 ◽  
pp. 50-53 ◽  
Author(s):  
V. Khranovskyy ◽  
M.O. Eriksson ◽  
G.Z. Radnoczi ◽  
A. Khalid ◽  
H. Zhang ◽  
...  
Keyword(s):  
Basal Plane ◽  
Stacking Faults ◽  
Zno Nanowires ◽  
Photoluminescence Study

Corrigendum to “Photoluminescence study of basal plane stacking faults in ZnO nanowires” [Physica B 439 (2014) 50–53]

2014 ◽  
Vol 454 ◽  
pp. 279
Author(s):  
Volodymyr Khranovskyy ◽  
M.O. Eriksson ◽  
G.Z. Radnoczi ◽  
Abbas Khalid ◽  
Hongzhou Zhang ◽  
...  
Keyword(s):  
Basal Plane ◽  
Stacking Faults ◽  
Zno Nanowires ◽  
Photoluminescence Study

Rapid synthesis of white-light emissive ZnO nanorods using microwave assisted method

2015 ◽  
Vol 29 (35n36) ◽  
pp. 1550238 ◽  
Author(s):  
M. Karimipour ◽  
A. Mohammad-Sadeghipour ◽  
M. Molaei ◽  
M. Khanzadeh
Keyword(s):  
Microwave Power ◽  
Surface Defects ◽  
Energy Gap ◽  
Defect Density ◽  
Average Length ◽  
Zno Nanorods ◽  
Blue Emission ◽  
Ammonium Hydroxide ◽  
Zno Nanowires ◽  
Zinc Blende

In this paper, firstly we have synthesized ZnO nanowires using zinc acetate, ethanol and ammonium hydroxide by a thermo-chemical method and then ZnO nanorods (NRs) have been prepared by microwave irradiation (MI) of an initial solution containing ZnO nanowires. X-ray diffraction (XRD) analysis showed the rare zinc-blende phase which grows on the surface of NRs and its crystallite size increases with the increase of microwave power. The average length and width of rods were observed several hundreds of nanometer and 80[Formula: see text]nm, respectively, from scanning electron microscope (SEM) analysis. Ultraviolet-visible (UV-vis) absorption spectroscopy indicates that a band tail forms due to MI, which has roughly 2[Formula: see text]eV energy gap. Photoluminescence (PL) spectroscopy indicated a blue emission and a white emission for ZnO nanowires and NRs, respectively. MI quenches the UV emission from ZnO NRs and enhances the surface defects’ emission. The resultant visible PL of the samples increases with the increase of microwave power that shows the growth of zinc-blende phase which has crucial effect on the defect density of NRs.

scholarly journals Pressure-dependent photoluminescence study of ZnO nanowires

2005 ◽  
Vol 86 (15) ◽  
pp. 153117 ◽  
Author(s):  
W. Shan ◽  
W. Walukiewicz ◽  
J. W. Ager ◽  
K. M. Yu ◽  
Y. Zhang ◽  
...  
Keyword(s):  
Zno Nanowires ◽  
Photoluminescence Study

Fine MCP Decapsulation Technology Development

2006 ◽  
Author(s):  
Jianwei Zhou ◽  
Wei Zheng ◽  
Taekoo Lee
Keyword(s):  
Chemical Etching ◽  
Etch Rate ◽  
Technology Development ◽  
New Technology ◽  
Ammonium Hydroxide ◽  
Mechanical Polishing ◽  
Technology Process ◽  
Tetra Methyl Ammonium Hydroxide ◽  
Die Surface

Abstract Multi-Chip Package (MCP) decapsulation is now becoming a rising problem. Because for traditional decapsulation method, acid can’t dissolve the top silicon die to expose the bottom die surface in MCP. It makes inspecting the bottom die in MCP is difficult. In this paper, a new MCP decapsulation technology combining mechanical polishing with chemical etching is introduced. This new technology can remove the top die quickly without damaging the bottom die using KOH and Tetra-Methyl Ammonium Hydroxide (TMAH). The technology process and relative application are presented. The factors that affect the KOH and TMAH etch rate are studied. The usage difference between the two etchant is discussed.

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