The Experts below are selected from a list of 180564 Experts worldwide ranked by ideXlab platform
Haiyang Mao - One of the best experts on this subject based on the ideXlab platform.
-
microfluidic surface enhanced raman scattering sensors based on nanopillar forests realized by an Oxygen Plasma stripping of photoresist technique
Small, 2014Co-Authors: Haiyang Mao, D D SheAbstract:A novel surface-enhanced Raman scattering (SERS) sensor is developed for realtime and highly repeatable detection of trace chemical and biological indicators. The sensor consists of a polydimethylsiloxane (PDMS) microchannel cap and a nanopillar forest-based open SERS-active substrate. The nanopillar forests are fabricated based on a new Oxygen-Plasma-stripping-of-photoresist technique. The enhancement factor (EF) of the SERS-active substrate reaches 6.06 × 10 6 , and the EF of the SERS sensor is about 4 times lower due to the infl uence of the PDMS cap. However, the sensor shows much higher measurement repeatability than the open substrate, and it reduces the sample preparation time from several hours to a few minutes, which makes the device more reliable and facile for trace chemical and biological analysis.
Kangji Kim - One of the best experts on this subject based on the ideXlab platform.
-
low temperature Oxygen Plasma treatment of tio2 film for enhanced performance of dye sensitized solar cells
Journal of Power Sources, 2008Co-Authors: Youngsoo Kim, Eom Ji Yoo, R Vittal, Yeonhee Lee, Namgyu Park, Kangji KimAbstract:Abstract The effects of low-temperature O2 Plasma treatment of a TiO2 film are studied with the objective of improving the performance of dye-sensitized solar cells (DSSCs). X-ray photoelectron spectra (XPS) reveal that the ratio of titanium dioxide to titanium sub-oxides is increased in the O2 Plasma-treated TiO2 film, compared with that of the untreated TiO2 film. This increase suggests that the Oxygen vacancies in the film are effectively reduced. The near-edge X-ray absorption fine structure (NEXAFS) spectra results agree with the XPS result. It is proposed that there is a correlation between the shifts of the peaks in the NEXAFS spectra and the adsorption of N719 dye on the TiO2 particles. A DSSC having an O2 Plasma-treated, 4 μm thick TiO2 film electrode renders a short-circuit photocurrent of 7.59 mA cm−2, compared with 6.53 mA cm−2 for a reference cell with an untreated TiO2 electrode of the same thickness. As a result of these changes, the solar-to-electricity conversion efficiency of the O2 Plasma-treated cell is found to be 4.0% as compared with 3.5% for the untreated cell. This improvement in the performance is rationalized on the basis of increased N719 dye adsorption on to the TiO2, due to the reduction in the number of Oxygen vacancies caused by the Oxygen Plasma treatment.
D D She - One of the best experts on this subject based on the ideXlab platform.
-
microfluidic surface enhanced raman scattering sensors based on nanopillar forests realized by an Oxygen Plasma stripping of photoresist technique
Small, 2014Co-Authors: Haiyang Mao, D D SheAbstract:A novel surface-enhanced Raman scattering (SERS) sensor is developed for realtime and highly repeatable detection of trace chemical and biological indicators. The sensor consists of a polydimethylsiloxane (PDMS) microchannel cap and a nanopillar forest-based open SERS-active substrate. The nanopillar forests are fabricated based on a new Oxygen-Plasma-stripping-of-photoresist technique. The enhancement factor (EF) of the SERS-active substrate reaches 6.06 × 10 6 , and the EF of the SERS sensor is about 4 times lower due to the infl uence of the PDMS cap. However, the sensor shows much higher measurement repeatability than the open substrate, and it reduces the sample preparation time from several hours to a few minutes, which makes the device more reliable and facile for trace chemical and biological analysis.
Jun Xu - One of the best experts on this subject based on the ideXlab platform.
-
microfluidic surface enhanced raman scattering sensors based on nanopillar forests realized by an Oxygen Plasma stripping of photoresist technique
Small, 2014Co-Authors: Wengang Wu, Pengpeng Lv, Jun XuAbstract:A novel surface-enhanced Raman scattering (SERS) sensor is developed for realtime and highly repeatable detection of trace chemical and biological indicators. The sensor consists of a polydimethylsiloxane (PDMS) microchannel cap and a nanopillar forest-based open SERS-active substrate. The nanopillar forests are fabricated based on a new Oxygen-Plasma-stripping-of-photoresist technique. The enhancement factor (EF) of the SERS-active substrate reaches 6.06 × 10 6 , and the EF of the SERS sensor is about 4 times lower due to the infl uence of the PDMS cap. However, the sensor shows much higher measurement repeatability than the open substrate, and it reduces the sample preparation time from several hours to a few minutes, which makes the device more reliable and facile for trace chemical and biological analysis.
Jae Min Myoung - One of the best experts on this subject based on the ideXlab platform.
-
reliable bottom gate amorphous indium gallium zinc oxide thin film transistors with tiox passivation layer
Electrochemical and Solid State Letters, 2009Co-Authors: Yu-jin Park, In Byeong Kang, Ji Hyuk Choi, In Jae Chung, Jae Min MyoungAbstract:Titanium oxide (TiO x ) passivation layer was employed and optimized to stabilize the performance of the bottom gate amorphous indium-gallium-zinc oxide (a-IGZO) thin-film transistors (TFTs). A molybdenum/titanium (Mo/Ti) source-drain electrode was deposited on an a-IGZO layer, and the TiO, passivation layer was formed by oxidizing the Ti layer using Oxygen Plasma after etching the Mo layer. By increasing the Oxygen Plasma treatment time, the subthreshold slope and leakage current of the a-IGZO TFTs were improved to 0.78 V decade -1 and 0.3 pA, respectively, and the degradation of the TFT performance was not observed, even after thermal treatment at 280°C for 1 h.
