Abstract
A comparative photoluminescence (PL) study of NiO nanowalls electrochemically deposited on indium-tin-oxide (ITO)- and gold (Au)-coated glass substrates was demonstrated. The NiO nanowalls had with an average diameter of 2–5 μm and a thickness of 50 nm. For Au-coated substrates, the nanowalls were observed to be decorated by spherical Au nanoparticles (NPs), whereas no NP was found for ITO-coated substrates. The X-ray diffraction (XRD) patterns revealed a dominant growth of NiO along (200) direction. For both the substrates, the X-ray photoelectron spectra (XPS) confirmed elemental purity of NiO with an oxidation state of +2. After eliminating the substrate effect, the nanowalls grown on Au-coated substrates revealed prominent XPS peaks related to metallic Au. Room temperature PL spectra for Au-decorated sample showed a remarkably intense peak at 544 nm corresponding to green light. The peak intensity was observed to be 30 times higher for Au-coated substrates with a wide red-shift. This optical enhancement was attributed to the far-field and near-field radiative effects caused by plasmonic resonance of Au NPs in the vicinity of high-k dielectric NiO nanowalls.
| Original language | English |
|---|---|
| Pages (from-to) | 63-68 |
| Number of pages | 6 |
| Journal | Materials Chemistry and Physics |
| Volume | 201 |
| DOIs | |
| Publication status | Published - 2017 Nov 1 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
Cite this
}
Enhanced photoluminescence in electrodeposited NiO nanowalls mediated by plasmonic Au nanoparticle. / Biswas, Pranab; Baek, Sung Doo; Kim, Jong Woo; Cho, Seong Rae; Kwon, Do Kyun; Lee, Su Jeong; Myoung, Jae Min.
In: Materials Chemistry and Physics, Vol. 201, 01.11.2017, p. 63-68.Research output: Contribution to journal › Article
TY - JOUR
T1 - Enhanced photoluminescence in electrodeposited NiO nanowalls mediated by plasmonic Au nanoparticle
AU - Biswas, Pranab
AU - Baek, Sung Doo
AU - Kim, Jong Woo
AU - Cho, Seong Rae
AU - Kwon, Do Kyun
AU - Lee, Su Jeong
AU - Myoung, Jae Min
PY - 2017/11/1
Y1 - 2017/11/1
N2 - A comparative photoluminescence (PL) study of NiO nanowalls electrochemically deposited on indium-tin-oxide (ITO)- and gold (Au)-coated glass substrates was demonstrated. The NiO nanowalls had with an average diameter of 2–5 μm and a thickness of 50 nm. For Au-coated substrates, the nanowalls were observed to be decorated by spherical Au nanoparticles (NPs), whereas no NP was found for ITO-coated substrates. The X-ray diffraction (XRD) patterns revealed a dominant growth of NiO along (200) direction. For both the substrates, the X-ray photoelectron spectra (XPS) confirmed elemental purity of NiO with an oxidation state of +2. After eliminating the substrate effect, the nanowalls grown on Au-coated substrates revealed prominent XPS peaks related to metallic Au. Room temperature PL spectra for Au-decorated sample showed a remarkably intense peak at 544 nm corresponding to green light. The peak intensity was observed to be 30 times higher for Au-coated substrates with a wide red-shift. This optical enhancement was attributed to the far-field and near-field radiative effects caused by plasmonic resonance of Au NPs in the vicinity of high-k dielectric NiO nanowalls.
AB - A comparative photoluminescence (PL) study of NiO nanowalls electrochemically deposited on indium-tin-oxide (ITO)- and gold (Au)-coated glass substrates was demonstrated. The NiO nanowalls had with an average diameter of 2–5 μm and a thickness of 50 nm. For Au-coated substrates, the nanowalls were observed to be decorated by spherical Au nanoparticles (NPs), whereas no NP was found for ITO-coated substrates. The X-ray diffraction (XRD) patterns revealed a dominant growth of NiO along (200) direction. For both the substrates, the X-ray photoelectron spectra (XPS) confirmed elemental purity of NiO with an oxidation state of +2. After eliminating the substrate effect, the nanowalls grown on Au-coated substrates revealed prominent XPS peaks related to metallic Au. Room temperature PL spectra for Au-decorated sample showed a remarkably intense peak at 544 nm corresponding to green light. The peak intensity was observed to be 30 times higher for Au-coated substrates with a wide red-shift. This optical enhancement was attributed to the far-field and near-field radiative effects caused by plasmonic resonance of Au NPs in the vicinity of high-k dielectric NiO nanowalls.
UR - http://www.scopus.com/inward/record.url?scp=85029313235&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85029313235&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2017.08.027
DO - 10.1016/j.matchemphys.2017.08.027
M3 - Article
AN - SCOPUS:85029313235
VL - 201
SP - 63
EP - 68
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
SN - 0254-0584
ER -