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使用溶膠-凝膠法製作鋯鈦酸鉛與稀土氧化化合物薄膜應用於鐵電元件和電解質-絕緣層-半導體結構感測器

為了解決magnet place tower 1的問題，作者貝克桑卡爾•普拉薩德 這樣論述：

The sol-gel route is a versatile wet chemistry method, suitable for the preparation of multilayer thin films with defined thickness and surface roughness. In this thesis work, sol-gel derived undoped and doped high-k ferroelectric materials lead zirconate titanate- Pb(ZrxTi1-x)O3 (PZT), and rare-ea

rth element high-κ Ce2(Zr1-xTix)Oy (CZT) mixed oxide films were prepared by spin coating technique on different substrates for ferroelectric MIM device application and electrolyte-insulator-semiconductor (EIS) pH-sensor for biomedical application, respectively. Ferroelectric materials, including all

rare-earth elements based oxide display a number of desirable properties such as a switchable polarization, high dielectric constant, ferroelectric responses. Due to these excellent properties, The high-κ oxides are widely used in devices such as memory elements, ultrasound generators, capacitors,

fuel cell, biosensors and many more. This research is directed an effective and simple technique to improve the performance of high-κ ferroelectric MIM capacitor and EIS pH sensor.The effect of different process conditions for all these oxide materials based thin films, the X-ray diffraction (X-ray)

, atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS), and high resolution transmission electron microscopy (HR-TEM) were used to examine the quality of the oxide films like, structural, morphological, chemical, and microstructural features, respectively. To study the electrical pr

operties of the PZT ferroelectric MIM capacitor, the polarization-electric field (P-E) and capacitance-electric field (C-E) curves were measured by modified Sawyer-Tower circuit and HP 4284A LCR meter at room temperature, respectively. The current density-voltage (J-V) measurement was executed usi

ng a B1500A semiconductor device analyzer. The pH sensitivity, hysteresis voltage and drift rate of the Ce2(Zr1-xTix)Oy (CZT) sensing film for EIS sensor devices were measured by capacitance-voltage (C-V) curves by HP 4284A LCR meter at room temperature.We investigated the structural and electrical

characteristics of lead zirconate titanate [Pb(Zr0.52Ti0.48)O3, PZT] thin films and followed by using sol-gel spin coating method. The Pb(Zr0.52Ti0.48)O3 dielectric based ferroelectric capacitor exhibited frequency independence of coercive field. It is an excellent behavior of the low power ferroele

ctric memory. However, the capacitance and remanent polarization are very low. Due to low capacitance and remanent polarization value, causing lead (Pb) deficiency in PZT. The ferroelectric performances of high-κ Pb(Zr0.52Ti0.48)O3 based capacitor can be improved by using excess lead. The PZT thin f

ilm prepared at 20 mol% excess lead exhibited the best electrical properties as compared to other conditions. We attribute this behavior to the optimal amount of excess lead in this PZT film forming a perovskite structure and suppressing the reaction of PZT film with RuO2 electrode. Currently, the m

ost fundamental and important of all process steps is the doping, which dramatically changes the electrical conductivity of the semiconductor material or oxide materials (ferroelectric and biosensor thin film materials) by introducing impurities into the crystal which provide additional negative (do

nor impurities) or positive carriers (acceptor impurities). Therefore we also demonstrated the influence of isovalent alkali-earth metal strontium (Sr) substitution of lead in lead zirconate titanate [Pb(Zr0.52Ti0.48)O3]. The RuO2/PSZT/RuO2 MIM device using sol-gel spin coating derived under three d

ifferent Sr concentrations were fabricated. The PSZT films prepared at 3 mol% Sr exhibited a perovskite structure (from XRD) and rougher surface roughness (from AFM) and thicker interfacial layer at the PSZT/ RuO2 interface (from FE-TEM). The RuO2/PSZT/RuO2 device featuring at the 3 mol% condition ex

hibited a low leakage current, a large capacitance value, and a high remanent polarization. This research directs an effective and simple way to improve the performance of high-κ dielectric MIM ferroelectric capacitors as a promising candidate for FeRAM applications.Moreover, we also found the promi

sing oxide sensing membranes for the EIS pH sensor. The rare-earth oxides are often added to a catalyst as supports to increase the catalysts, thermal stability, activity and selectivity. Among the rare-earth materials, cerium has a unique property which is the interchange of oxidation states Ce4+ a

nd Ce3+ coupled with oxygen vacancy defects OVDs formation to improve the sensing performance of the EIS pH sensor.The high-κ Ce2(Zr1-xTix)Oy (CZT) noble oxide sensing membrane for the EIS pH-sensor was systematically investigated as it provides a high sensing performance and better stability. The e

ffect of sensing performance on different Zr/Ti ratio in CZT films were investigated thoroughly. The high-κ Ce2(Zr0.53Ti0.47)Oy annealed at 800 οC in O2 ambient displayed the better sensing performance compared to other Zr/Ti ratio. Moreover, the impact of doping concentration on sensing performanc

e behavior was also systematically investigated. The physical and sensing performances were investigated with various Sr concentration in CZT. The 10 mol% Sr based CZT annealed at 800 οC in O2 displayed the super-Nernstian response of pH detection compared to other concentrations. Due to the excelle

nt high sensitivity and reliability, 10 mol% Sr condition on CZT sensing film was used to detect the DNA-DNA hybridization without a linker. The flat band voltages were consistently shifted to left after adding cDNA followed by ssDNA on the film surface. It is due to negative surface charge effect,

causing DNA-DNA mutation through electrostatic/ionic interactions.Finally, we also reported the sol-gel derived sensing membrane using lanthanides series (La to Lu) based mixed oxide [R2ree(Zr0.53Ti0.47)Ox] for electrolyte-insulator-semiconductor (EIS) pH sensor.

企業商品形象、公民,形象與信譽對組織人才吸引力之影響：以民營商業銀行為實證對象

為了解決magnet place tower 1的問題，作者孫弘岳 這樣論述：

儘管「企業形象」已被視為求才組織在勞動市場上取得關鍵優勢的因素，但至今國內外在這方面的相關研究卻很少，對於那些形象構面才是影響人才招募效果的問題也尚未獲得解答。而本研究的目的則是要探討企業在顧客心中的形象與組織人才吸引間的相關性。根據社會識別理論與信號理論，本研究假設企業能夠藉由其在消費者心中的商品形象、企業公民形象與企業信譽以強化該組織的人才吸引力。 本研究以台灣40家民營商業銀行為實證對象，透過台北地區6所商管學院的應屆畢業生，包括大學部與碩士班，共4組填答人員，分別為84人，65人，87人，124人，針對他們對這40家銀行的知覺進行上述三類企業形象與組織人才吸引力的

調查。研究發現，企業商品形象與企業信譽對組織人才吸引力具有正向的影響，而企業公民形象與人才吸引力間則沒有顯著關係。此結果顯示，當企業能夠在商業市場中建立起正面的商品形象和信譽時，將有助於提升其在勞動市場中的競爭力。