Synthesis and Janus structure fabrication of 2D semiconductors by controllable thin-film techniques

林御專助理教授(陽明交通大學材料科學與工程學系所)

<專題演講>2026/5/14(四)14:10綜合大樓2樓48218教室

Two-dimensional (2D) transition metal dichalcogenides (TMDs) exhibit exciting properties and versatile material chemistries that are promising for transistor scaling, energy technologies, quantum information science, and flexible optoelectronic devices. To accelerate their technological readiness, it is necessary to develop controllable synthesis and doping strategies to achieve desirable thicknesses, compositions, and electronic structures in 2D TMDs.

First, I will discuss our development of metal–organic chemical vapor deposition (MOCVD) for scalable semiconducting 2D TMDs. Understanding the growth mechanisms of 2D TMDs in MOCVD is key to achieving large-area, uniform epitaxial growth on suitable single-crystalline substrates. This approach enables the fabrication of high-quality van der Waals heterostructures and compatibility with cleanroom processes for selective-area growth. It also allows substitutional doping during material synthesis, enabling more precise modulation of the optical and electrical properties of 2D TMDs than ever before.

The second part of my talk will focus on low-energy ion implantation for doping and alloying 2D crystals. The plasma plumes generated during pulsed laser deposition (PLD) provide hyperthermal kinetic energies (KEs) that have been used for decades to synthesize a variety of thin films and heterostructures. More recently, they have been explored for producing 2D TMDs in metastable phases or alloy compositions that are difficult to achieve using conventional bottom-up synthesis methods. This controllable energetic source has also recently been investigated for the synthesis of metastable Janus 2D materials, a new class of quantum materials.

Using plasma plumes, we can selectively replace sulfur (S) atoms in 2D WS₂ with selenium (Se) to form Janus WSSe. The kinetic energies of the plasma species are monitored using in situ plasma diagnostics and moderated to approximately 5–10 eV per atom, enabling successful conversion of WS₂ into Janus WSSe. Our transient absorption measurements revealed that excitons in Janus 2D TMDs form approximately 30% faster than in their pristine counterparts due to enhanced electron–phonon interactions arising from the newly introduced built-in dipole moment. These findings may help theorists design novel heterostructures based on Janus materials for next-generation photovoltaic devices, charge-transfer valves, and efficient energy-harvesting technologies.

Magnetic Fields and Plasma Dynamics in Solar Activity

楊雅惠教授(中央大學太空科學與工程學系)

<專題演講>2026/5/7(四)14:10綜合大樓2樓48218教室

Solar activity, including solar flares, coronal mass ejections (CMEs), and coronal holes (CHs), is the primary driver of disturbances in the geospace environment. Both flare and CMEs are associated with eruptions of complex magnetic field structures in active regions (ARs), although they perform distinct characteristics. In contrast, CHs are the low-density and low-temperature regions characterized by predominantly open magnetic field configurations and can persist over multiple solar rotations. Solar flares are the sudden release of magnetic energy built up in the solar atmosphere, while CMEs are a massive burst of plasma embedded with magnetic field ejected from the Sun, often occurring in association with flares. Here the potential field and nonlinear force-free field models are employed to reconstruct the magnetic fields of flaring ARs and CHs, as well as to quantify the non-potentiality of ARs and magnetic field expansion in CHs. In addition, differential emission measure (DEM) analysis is used to diagnose plasma properties relevant to both flare and CH studies. Furthermore, solar radio bursts (SRBs), another phenomenon accompanying with solar activity, are generated through interactions between energetic electrons accelerated by flares or CME-driven shocks and ambient plasma as they propagate from the corona into interplanetary space. The progress of SRBs monitoring in Taiwan and the type III SRB study will be demonstrated in the end of this talk.

Physics of Magnetic Reconnection

陳秋榮教授(普林斯頓電漿物理實驗室)

<專題演講>2026/4/30(四)14:10綜合大樓2樓48218教室

Magnetic reconnection is an important physical process to change the magnetic field topology and convert the electric and magnetic (EM) field energy into the plasma energy. The magnetic reconnection process is the main driving mechanism of flares and coronal mass ejections in the solar corona. It is also considered as a key mechanism of heating corona plasmas to millions of degree temperature. It is also perceived that the stellar flares are also produced by the magnetic reconnection process. Magnetic reconnection also plays a critical role in the interaction between the solar wind and the planetary magnetosphere and allows some solar wind plasma to enter the magnetosphere and be accelerated and stored in the magnetosphere. In the laboratory fusion energy research the magnetic reconnection process has been deployed to obtain toroidal plasmas with fusion ignition ion temperatures of tens of keV by merging two spherical tokamak or spheromak or field-reversed configuration plasmas toward each other. In the talk I will explain the basic physics ideas and how ions and electrons gain energy in the magnetic reconnection process.

References

[1] C. Z. Cheng et al., Phys. Plasmas 28, 072101 (2021) 

[2] C. Z. Cheng et al., Phys. Plasmas 22, 101205 (2015) 

[3] C. Z. Cheng et al., Plasma Fusion Res. 11, 1401081 (2016)

[4] Y. Ono et al., Plasma Phys. Control. Fusion 67, 055018 (2025). 

[5] H. Tanabe et al., Nucl. Fusion 61, 106027 (2021)

Plasma for Cancer, Transdermal and Semiconductor

鄭雲謙教授(台灣大學電機工程學系)

<專題演講>2026/4/23(四)14:10綜合大樓2樓48218教室

We evaluates Argon Cold Atmospheric Plasma (Ar-CAP) generating Reactive Oxygen and Nitrogen Species (RONS) on murine epidermal melanoma xenografts. Direct treatment exposes tumors to short- and long-lived RONS via water, achieving greater initial tumor volume reduction than indirect treatment (long-lived RONS only after 10-minute decay). Both inhibit growth versus controls by day 13. Spectroscopic analysis shows increasing H₂O₂, NO₂⁻, NO₃⁻, and ∙OH with treatment time; ∙OH penetrates 2 mm in water. No major side effects observed except elevated AST/ALT levels, suggesting short-lived RONS are key for early efficacy, advancing plasma medicine toward human melanoma trials. We also optimizes microbubble generation using a low-flow water pump and mechanical designs like Venturi pipes (15° contraction angle), single-layer mesh, and bubble circulation to enhance nitric oxide (NO) dissolution in water. NO gas is produced via double spark plugs, with parameters like higher voltage duty cycles, dual plugs, and elevated chamber temperatures yielding higher concentrations. Microbubbles improve NO solubility, enabling penetration into agarose gel but not porcine skin or hydrophobic PP membranes. This portable, cost-effective plasma-microbubble method avoids gas leakage issues, promoting NO's benefits for vascular health, male function, and athletic performance, though human applications need further adaptations. In this report, we also share our study to enhance the performance of the plasma in etching.

學術倫理相關規範及認列說明

吳湘淩 管理師 (成大學誠辦公室)

遠離學術不端—淺談學術寫作注意事項

吳怡潔 助理管理師 (成大學誠辦公室)

<專題演講>2026/4/16(四)14:10綜合大樓2樓48218教室

自主水下載具之泊塢控制系統

余昭明博士(工研院電子與光電系統研究所)

<邀請演講>2026/4/9(四)14:10綜合大樓2樓48218教室

本研究整合 YOLO、DDPG 與 IBVS，建立 AUV 智慧泊塢控制系統，完成從目標辨識到精準對接的完整流程。實驗結果顯示，DDPG 相較於傳統 FLC 可明顯提升對接穩定性與控制精度，驗證深度學習與強化學習應用於 AUV 自主泊塢的可行性。

Laboratory Experiment of Magnetic Reconnection

Professor Yasushi Ono (日本東京大學)

<邀請演講>2026/4/8(三)13:10綜合大樓2樓48218教室

Recent laboratory merging/ reconnection experiments have solved many key physics of magnetic reconnection: 1) reconnection heating/ acceleration, 2) fast reconnection mechanisms, 3) plasmoid reconnection, 4) non-steady reconnection, and 5) non-thermal particle acceleration using new kinetic interpretations. The measured 2D contours of ion and electron temperatures in TS-3, 4, and MAST reveal ion heating in the downstream by reconnection outflow and electron heating/ acceleration at around the X-point and in the downstream. The fast shock and ion viscosity are the major dumping (heating) mechanisms for the accelerated ions. This talk will review major progress in the international and interdisciplinary merging tokamak experiments.

地球磁層頂模型：回顧、應用和展望(Shue et al.)

許志浤教授(中央大學太空科學與工程學系)

<專題討論>2026/4/2(四)14:10綜合大樓2樓48218教室

磁層頂是磁層的最外邊界，其位置主要由太陽風動壓和行星際南北分量決定。Shue et al. [1997; 1998] 提出的穩態地球磁層頂模型，描述磁層頂位置隨太陽風條件的大尺度變化。在軸對稱的假設下，此模型透過擬合磁層頂穿越位置而得到。此模型的公式簡潔而精確，被太空物理學家廣泛接受，並已成為太空物理界的標準模型。本次報告將介紹模型擬合的公式、用於建構模型的資料、Shue et al. [1997] 和Shue et al. [1998] 模型的異同、模型公式中隱含的磁通量守恆以及公式中每個參數代表的物理意義。報告中也將提及模型的初始開展過程和計畫實施前後收到的批評意見。此模型的應用廣泛，涵蓋磁層頂、磁鞘以及船艏震波相關參數的計算；可與全球磁層數值模型結果進行比較，並為Tsyganenko全球磁層經驗模型和VERB-4D內磁層數值模型提供邊界條件；此外，它還可應用於其它行星和月球上，甚至包括行星逃逸層和大氣平流層。最後，本報告將重點放在未來潛在的研究方向。

參考文獻：

Shue, J.-H.,  Chao, J. K.,  Fu, H. C.,  Russell, C. T.,  Song, P.,  Khurana, K. K., &  Singer, H. J.  (1997).  A new functional form to study the solar wind control of the magnetopause size and shape.  Journal of Geophysical Research,  102(A5),  9497–9511.  https://doi.org/10.1029/97JA00196

Shue, J. H.,  Song, P.,  Russell, C. T.,  Steinberg, J. T.,  Chao, J. K.,  Zastenker, G., et  al. (1998).  Magnetopause location under extreme solar wind conditions.  Journal of Geophysical Research,  103(A8),  17691–17700.  https://doi.org/10.1029/98JA01103

次世代螢光奈米鑽石於極紫外光(EUV)與軟X光偵測及檢測系統之開發

楊騰毅博士(國家儀器科技研究中心)

<專題討論>2026/3/26(四)14:10綜合大樓2樓48218教室

當今半導體產業的發展長期依賴摩爾定律，以持續提升電晶體的性能與整合密度。為達成此一目標，極紫外光(Extreme Ultraviolet, EUV)光刻技術已成為先進製程中的關鍵核心技術。EUV 輻射具有極短的波長(約 10–121 nm)，使得製造商能夠在晶片上製作奈米尺度的電路圖案，進一步推動半導體技術的突破與創新，並支撐摩爾定律的持續發展。

隨著各類 EUV 輻射光源的發展與應用，EUV 光束線的診斷與監測也變得日益重要，並逐漸成為相關研究領域的熱門議題。本次演講將介紹一種創新的 EUV 偵測技術，利用螢光奈米鑽石(Fluorescent Nanodiamond, FND)薄膜作為閃爍體材料，將 EUV 輻射轉換為可見光訊號以進行影像偵測。此偵測系統具有優異的抗高能輻射能力，不易因高能量光子照射而損壞，因此特別適合用於 EUV 光束品質評估與空間位置監測。透過此技術可獲得完整且高解析度的光束資訊，進而提供更全面的數據分析能力，並拓展其在科學研究與工業應用上的潛力。

英語寫作

吳少方老師(成功大學外語中心)

<專題討論>2026/3/19(四)15:30綜合大樓2樓48218教室

本次課程列為研究生通識，切勿缺席以免影響畢業! 

電漿科技於生活應用

劉志宏博士(工業技術研究院機械與機電系統研究所)

<專題討論>2026/3/12(四)14:10綜合大樓2樓48218教室

電漿(Plasma)為部分離子化氣體，其組成物種包括帶電荷之電子、離子及不帶電的氣體原子/分子和自由基等，運用其電漿技術特性，已廣泛應用於產業界之材料表面加工增”值”製程，如材料表面清潔與活化、蝕刻及鍍膜等關鍵製程。此次演講將著重於電漿技術發展及其於科技生活之應用面，內容涵蓋真空電漿及大氣壓電漿技術，課程中將以產業應用案例與聽者進行交流、分享與討論，期藉此機會能激發出不同創新科技應用，活絡電漿技術於各領域之發展與其技術帶給生活的效益最大化。

金屬中心無人機多元應用方案與未來挑戰

楊光勳組長(金屬工業研究發展中心航太智慧科技研發組)

<專題討論>2026/3/5(四)14:10綜合大樓2樓48218教室

楊光勳所參予的IVC實驗室(智慧移動載具實驗室_Intelligent Vehicle Laboratory (Center))，以移動式載具為核心發展陸上無人化移動載具與空中移動式載具等相關應用並提供多元化且客製化服務。榮獲多項包含R&D 100 Awards、Edison Awards、CEO World Awards、德國iF產品設計獎等國際研發技術的肯定。現有包括無人飛行載具研發團隊、無人AMR系統研發團隊、水上載具研發團隊、AI軟體分析開發團隊等多領域整合。隨著國內無人機發展逐步快速成長IVC團隊於2024年加入航太處的行列。除了針對無人機與無人載具的發展外亦朝向航太領域包含衛星通訊、多樣化載具遠距聯合作業與強化國內無人載具關鍵零組件為主軸持續前進。