12/14 專題演講公告

Hits:172

演講人：吳彝任先生

服務單位：普羅森公司Phrozen

演講題目：以Phrozen創業至走向國際看台灣3D列印的產業發展  

演講時間：109年12月14日(星期一)早上10點20分

演講地點：工綜館203國際演講廳

個人學歷：

國立台灣大學/材料科學暨工程學研究所/碩士

國立台灣大學/材料科學暨工程學系/學士

建國中學/普通科/高中

個人經歷：

普羅森科技(Phrozen)/Business/CEO(現職)

台灣蘇威(Solvay)/Customer Technology Development/Engineer

台灣羅圖(Roctool)/Business Development/Manager, Asia

台灣科萊恩(Clariant)/Sales/Sales Engineer, South East Asia

台灣杜邦(DuPont)工程塑料部/Marketing/Marketing Specialist, Greater China

台灣杜邦(DuPont)電子材料部/Application Technology Development/Application Engineer

演講摘要：

介紹3D列印發展趨勢和台灣3D列印現況，並由Phrozen從無到有的創業經驗分享3D列印的產業現況。

12/07 專題演講公告

Hits:374

演講人：羅承慈 博士

服務單位：中山大學材光系

演講題目：Synthesis and Applications of Functional Cross-linked Core-shell Block Copolymers

演講時間：109年12月07日(星期一)早上10點20分

演講地點：工綜館203國際演講廳

個人學歷：

國立台灣大學/化學工程學系/博士

長庚大學/化工與材料工程研究所/碩士

長庚大學/化工與材料工程學系/學士

個人經歷：

國立中山大學/材料與光電科學學系/助理教授 (現職)

Yamagata University(日本山形大學)/Department of Organic Materials Science/助理教授

中原大學/化學工程學系/助理教授

演講摘要：

A series of high-performance cross-linked core-shell block copolymers as charge-storage or ion-conductive materials will be introduced. We have been studied in the functional core-shell block-copolymer nanoparticles with cross-linking conjugating cores surrounding by hydrophilic shells via Suzuki-coupling reaction, while the nanoparticles with cross-linked cores using triazole-based comprising several ion-conductive functional groups, such as the zwitterionic groups or triazolium groups with salts or ion liquids were also studied. The nanoparticles presented uniform size distribution and well-defined core-shell nanostructure, while the intra-molecular charge transfer was effectively enhanced due to the incorporation of conjugating groups. Both the conjugating-core sizes and π-π interaction of the prepared nanoparticles were effectively controlled by the block composition. Moreover, the studied transistor memory devices embedded with these solution-process-able nanoparticles exhibited non-volatile flash-type memory characteristics and presented both amphiphilic carrier-trapping abilities. For those ionic-conductive nanoparticles, the highest ionic conductivities of 1.26 × 10^–3 S/cm were achieved at 90 ^oC with the presence of 30 wt.% ionic liquid, which are due to the enhanced segmental molecular motion and the formation of a preferable ionic-conductive path composed of the hydrophobic ionic-liquid based shell with the added ionic liquid. We believe this achievement provides multiple applications of cross-linked nanoparticles as a promising candidate for both charge-storage and ion-conductive materials in the future organic technology.

11/30 專題演講公告

Hits:438

演講人：胡璧合 博士

服務單位：臺灣大學電機系

演講題目：Ferroelectric FET Non-volatile Memory

演講時間：109年11月30日(星期一)早上10點20分

演講地點：工綜館203國際演講廳

個人學歷：

國立交通大學/電子研究所/博士

國立交通大學/電子研究所/碩士

國立交通大學/材料科學與工程學系/學士

個人經歷：

國立台灣大學/電機工程學系/副教授 (現職)

國立中央大學/電機工程學系/副教授

國立中央大學/電機工程學系/助理教授

The Australian National University/Department of Electronic Materials Engineering/Visiting Scholar

University of California, Berkeley/Department of Electrical Engineering and Computer Sciences/Visiting Scholar

國立交通大學/智慧型記憶體及晶片系統實驗室/助理研究員

演講摘要：Artificial intelligence (AI) and Internet-of-Things (IoT) play a vital role in the future. For the von Neumann architecture, communication bottleneck between memory and processors becomes one of the most series problems due to low data throughput and high-power consumption. Non-volatile memory (NVM) based synapse and logic-in-memory circuit have been proposed to alleviate these problems. Ferroelectric Field-Effect-Transistor (FeFET) has been explored actively for emerging non-volatile memory and neuromorphic computing due to its high compatibility with CMOS platform. In this talk, I will introduce the operation principles and the challenges of FeFET memory. We have proposed a novel split-gate FeFET (SG-FeFET) for non-volatile memory and neuromorphic applications, which significantly improves the energy efficiency and reduces the power consumption. The reliability and endurance of SG-FeFET memory have also been improved owing to the lowered write voltage. SG-FeFET as a synaptic device has also been investigated including the non-linearity, asymmetry, and dynamic range of conductance updates.

11/23 專題演講公告

Hits:371

演講人： 莊家翔 博士

服務單位：中原大學電子工程系

演講題目：Investigations for magnetoresistance of ultralow-hole-density monolayer epitaxial graphene grown on SiC systems

演講時間：109年11月23日(星期一)早上10點20分

演講地點：工綜館203國際演講廳

個人學歷：

國立台灣大學/物理所/博士

個人經歷：

中原大學/電子工程學系/助理教授 (現職)

演講摘要：

In this talk, I focus on detailed measurements on ultralow-density p-type monolayer epitaxial graphene, which has yet to be extensively studied. The measured resistivity ρxx shows insulating behavior in the sense that ρxx decreases with increasing temperature T over a wide range of T (1.5 K ≤ T ≤ 300 K). The crossover from negative magnetoresistivity (MR) to positive magnetoresistivity at T = 40 K in the low-field regime is ascribed to a transition from low-T quantum transport to high-T classical transport. For T ≥ 120 K, the measured positive MR ratio [ρxx(B) − ρxx(B = 0)]/ρxx(B = 0) at B = 2 T decreases with increasing T, but the positive MR persists up to room temperature. Our experimental results suggest that the large MR ratio (~100% at B = 9 T) is an intrinsic property of ultralow-charge-density graphene, regardless of the carrier type. This effect may find applications in magnetic sensors and magnetoresistance devices.
Keywords: epitaxial graphene, resistance standard, magnetoresistance, quantum hall

11/16 專題演講公告

Hits:424

演講人：徐斌睿 博士

服務單位：清華大學物理系

演講題目：Proximity-Effect-Induced Superconductivity in Monatomic Ni-Pb Alloy and Ni Nanoislands

演講時間：109年11月16日(星期一)早上10點20分

演講地點：工綜館203國際演講廳

個人學歷：

國立中央大學 / 物理系 / 碩士

國立臺灣大學 / 物理所 / 博士

個人經歷：

國立清華大學 / 助理教授 (現職)

德國福茲堡大學/博士後研究

德國漢堡大學/博士後研究

演講摘要：

Proximity effect facilitates the penetration of Cooper pairs that permits superconductivity in normal metal with reduced dimensionality, offering a promising approach to develop novel quantum phenomena and emergent phases of matters in hybrid magnetic/superconducting nanostructures. Here, we have investigated proximity-induced superconductivity in monatomic Ni-Pb alloy and Ni nanoislands grown on Pb(111) by scanning tunneling microscopy/ spectroscopy (STM/STS) combined with theoretical calculations. Through elemental Pb superconducting substrate, tunneling conductance spectra have resolved an induced superconductivity with a gap size Δ about 0.85 meV in Ni-Pb alloy, which is about 0.11 meV smaller than Pb(111). On the contrary, Ni nanoislands with honeycomb lattice display a superconductivity gap with the same size of the Pb(111) substrate. From spatially monotonic decrease of Δ across the interface between Ni-Pb alloy and Pb(111), the decay length ξ_L about 5 nm has been extracted. According to the Usadel fittings and the BdG model, a weak ferromagnetism with an effective temperature about 6 ~ 15 K explains such rather short decay length as well as reduced superconductivity gap in the Ni-Pb surface alloy. As for honeycomb-structured Ni nanoislands, asymmetric edge scattering of surface electrons on Pb(111) has been revealed and further theoretical insights on the details of strong suppression of backscattering at the bearded type of edges are currently in progress.

11/02 專題演講公告

Hits:284

演講者：莊天明 博士

演講題目：Visualizing Emergent Superconductivity by Spectroscopic Imaging - Scanning Tunneling Microscopy