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RISS 인기검색어
- 검색키워드
- 저자 : M. Horprathum (검색결과 3 건)
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W. Phae-ngam,M. Horprathum,C. Chananonnawathorn,T. Lertvanithphol,B. Samransuksamer,P. Songsiriritthigul,H. Nakajima,S. Chaiyakun 한국물리학회 2019 Current Applied Physics Vol.19 No.8
Nanocolumnar titanium zirconium nitride (TiZrN) films deposited on silicon wafer substrates were fabricated via reactive magnetron co-sputtering with oblique angle deposition (OAD) at room temperature. The influences of the sputtering power of Zr target varied from 100 to 300 W, on the structure, morphology and composition of the nanocolumnar TiZrN film were investigated by gracing-incidence X-ray diffraction (GIXRD), field emission scanning electron microscope (FE-SEM), transmission electron microscope (TEM), energy dispersive X-ray spectroscopy (EDS), atomic force microscope (AFM) and photoelectron spectroscopy (PES). The GIXRD patterns revealed that the prepared films deposited at different sputtering powers of Zr target were crystalline in cubic phase with preferential orientation (111) and (222) planes of ZrN and TiN, respectively. The morphology obtained from FE-SEM showed well aligned slanted nanocolumnar structure, which come from the OAD technique. Increasing the sputtering power of Zr target, led to high adatom energy and enhanced collision effect during film deposition which the nanocolumnar showed obvious change in the diameter, length and tilt angle. The EDS mapping inside the nanocolumnar confirmed the homogeneity of the Ti, Zr and N element distributed in the nanocolumnar TiZrN films. Finally, the tribology behavior was preliminarily investigated based on the hardness of the nanocolumnar film and discussed in this manuscript.
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Ruamnikhom, R.,Limsuwan, P.,Horprathum, M.,Chanthima, N.,Kim, H. J.,Ruengsri, S.,Kaewkhao, J. Hindawi Limited 2014 Advances In Materials Science And Engineering Vol.2014 No.-
<P>Physical, optical, and luminescence properties of Nd<SUP>3+</SUP>ions in bismuth barium borate glass system were studied. The glasses prepared by a melt quenching method were doped at various Nd2O3concentrations in compositions (40-<I>x</I>)B2O3 : 40Bi2O3 : 20BaO : <I>x</I>Nd2O3(where<I>x</I>= 0.00, 0.50, 1.00, 1.50, 2.00, and 2.50 in mol%). Luminescence properties of the glasses were studied under two excitations of 585 and 750 nm for downconversion. From both excitations, the results show emission bands in NIR region corresponding to the transitions between<SUP>4</SUP>F3/2 → <SUP>4</SUP>I9/2(900 nm),<SUP>4</SUP>F3/2 → <SUP>4</SUP>I11/2(1,060 nm), and<SUP>4</SUP>F3/2 →<SUP> 4</SUP>I13/2(1,345 nm). The luminescence intensity obtained with 585 nm excitation was stronger than 750 nm, with the strongest NIR emission at 1,060 nm. The upconversion emission spectrum exhibits strong fluorescence bands in the UV region at 394 nm ( <TEX>$ \lambda _{\text{ex}}=591$</TEX> nm). The processes are associated with excited state absorption (ESA) from<SUP>4</SUP>F3/2level to<SUP>4</SUP>D3/2level and it is the radiative decay from the<SUP>4</SUP>D3/2to ground levels (<SUP>4</SUP>D3/2 → <SUP>4</SUP>I13/2) which are responsible for the emission at 394 nm.</P>
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P. Nuchuay,T. Chaikeeree,M. Horprathum,N. Mungkung,N. Kasayapanand,C. Oros,S. Limwichean,N. Nuntawong,C. Chananonnawathorn,V. Patthanasettakul,P. Muthitamongkol,B. Samransuksamer,S. Denchitcharoen,A. 한국물리학회 2017 Current Applied Physics Vol.17 No.2
Growths of the indium tin oxide (ITO) nanorod films have been demonstrated by ion-assisted electronbeam evaporation with the glancing-angle deposition technique based on variation in deposition rate. Investigations have been performed on nanostructured ITO films deposited on ITO-coated commercial substrates in comparison to bare substrates. The physical microstructures have been investigated by grazing-incident X-ray diffraction (GIXRD), field-emission scanning electron microscopy (FE-SEM), and high-resolution transmission electron microscopy (HR-TEM). The electrical, optical, and hydrophobic properties were characterized by four-point probe measurements, UVeViseNIR spectrophotometry with angle-dependent technique, and contact angle goniometry, respectively. The results indicated that physical morphologies and nanorod diameters of ITO nanorod films were heavily influenced, and thus could be controlled, by deposition rate. The primary reason was self-annealing effect which occurred during film deposition and was crucial factor towards surface diffusion and film crystallinity. From the optical examinations, ITO nanorods deposited on the ITO-coated glasses exhibited significant improvements on transparent conductive oxide (TCO) properties from reference samples. The proposed ITO materials could therefore function as omnidirectional anti-reflection materials and super hydrophobic surface. This work have also proved that the ITO nanorods prepared by the electron-beam evaporation with the GLAD technique was highly promising for solar cell and optoelectronic applications.
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