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Layered Semiconducting Materials for Optoelectronic and Memristive Device Applications
Layered Semiconducting Materials for Optoelectronic and Memristive Device Applications
Layered Semiconducting Materials for Optoelectronic and Memristive Device Applications

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자료유형  
 학위논문 서양
최종처리일시  
20260202105213
ISBN  
9798291564813
DDC  
620.5
저자명  
Ki, Seung Jun.
서명/저자  
Layered Semiconducting Materials for Optoelectronic and Memristive Device Applications
발행사항  
[Sl] : University of Michigan, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
135 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-02, Section: B.
주기사항  
Advisor: Liang, Xiaogan.
학위논문주기  
Thesis (Ph.D.)--University of Michigan, 2025.
초록/해제  
요약As chip sizes scale down to the sub-10 nm level, the physical limitations of bulk silicon materials have made further miniaturization increasingly unsustainable. Challenges in scaling bottlenecks have slowed the progress in miniaturization, and memory-related challenges. In response to these limitations, layered materials, particularly two-dimensional (2D) semiconductors, have emerged as promising alternatives for the next generation of electronic and optoelectronic devices. Materials like MoS₂ and Bi₂Se₃ exhibit exceptional electronic, and optical properties that make them ideal candidates for a wide range of applications, from biosensing to neuromorphic computing. This thesis explores the development of layered semiconducting materials in both optoelectronic biosensors and memristive devices.The presented dissertation projects aim to address part of the aforementioned challenges and realize the following objectives: (1) Development and optimization of 2D material-based optoelectronic devices for biosensing applications; (2) Experimental investigation in memory beahviors of MoS₂ memristors for temporal information processing; (3) Scalable fabrication of vertically stacked Bi₂Se₃ memristor arrays using a gold-assisted deposition strategy; (4) Construction of Bi₂Se₃ memristors that can realize hardware implementation of neuromorphic computing frameworks for robotic vehicle control.The first part of the thesis presents a study on MoS₂-based optoelectronic devices for biosensing applications. In-plane MoS₂ photodetectors were fabricated and optimized for critical performance parameters including responsivity (R), and noise equivalent power (NEP). The study identified that an MoS₂ thickness of ~15 nm yields optimal performance, with R = 164.3 A/W, NEP = 3.99 x 10⁻¹⁷ W/Hz¹ᐟ², and D* = 5.01 x 10¹⁰ Jones. A 4 x 4 array of optimized MoS₂ optoelectronic biosensor units was developed for detecting D-lactate, achieving a limit of detection (LOD) of 0.87 ± 0.032 x 10⁻³ µg/mL. The commercial potential of this platform was further explored through the NSF I-Corps program.The second part of the thesis presents experimental and system-level studies on the short-term and long-term memristive switching behaviors of MoS₂-based devices. The devices exhibited distinct pulse-dependent conductance modulation consistent with biological synapses. These were utilized to construct a temporal information processing system capable of performing a rover collision avoidance, demonstrating the feasibility of hardware-based neuromorphic preprocessing.The third part introduces a scalable, gold-assisted physical vapor deposition (PVD) method for producing vertically stacked Bi₂Se₃ memristor arrays without the need for plasma etching. This method yielded uniform Bi₂Se₃ layer deposition, laying a strong foundation for system-level integration. The average grain size of the Bi2Se3 crystals grown on the Au layer is ~ 450 nm, which is 50-folds larger than the crystal size grown on the bare SiO2 substrate.The fourth part of the thesis presents the construction and implementation of a fully hardware-based reservoir computing system capable of controlling dynamic systems. A Bi₂Se₃ memristive crossbar array exhibited stable non-volatile analog conductance modulation with long retention times ( 1,000 s). A fully hardware-based readout layer was developed to enable real-time processing of dynamic inputs and generation of motor commands without digital computation. The implemented system achieved ultra-low power consumption (~7 µW), representing a substantial reduction compared to conventional software-based controllers. In lever balancing system, the hardware-based readout layer demonstrated excellent performance with a low normalized-root-mean-square-error (NRMSE) of 0.094, validating its accuracy and efficiency. The presented device and system framework offers a promising path toward constructing low-power, hardware-based reservoir computing and control systems suitable for a wide range of miniature robotic applications.
일반주제명  
Nanotechnology
일반주제명  
Nanoscience
일반주제명  
Mechanical engineering
일반주제명  
Materials science
키워드  
Layered semiconducting materials for optoelectronic and memristive device applications
키워드  
Silicon
키워드  
Biosensing applications
키워드  
Temporal information
키워드  
Optoelectronic devices
기타저자  
University of Michigan Mechanical Engineering
기본자료저록  
Dissertations Abstracts International. 87-02B.
전자적 위치 및 접속  
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MARC

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■1001  ▼aKi,  Seung  Jun.
■24510▼aLayered  Semiconducting  Materials  for  Optoelectronic  and  Memristive  Device  Applications
■260    ▼a[Sl]▼bUniversity  of  Michigan▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a135  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-02,  Section:  B.
■500    ▼aAdvisor:  Liang,  Xiaogan.
■5021  ▼aThesis  (Ph.D.)--University  of  Michigan,  2025.
■520    ▼aAs  chip  sizes  scale  down  to  the  sub-10  nm  level,  the  physical  limitations  of  bulk  silicon  materials  have  made  further  miniaturization  increasingly  unsustainable.  Challenges  in  scaling  bottlenecks  have  slowed  the  progress  in  miniaturization,  and  memory-related  challenges.  In  response  to  these  limitations,  layered  materials,  particularly  two-dimensional  (2D)  semiconductors,  have  emerged  as  promising  alternatives  for  the  next  generation  of  electronic  and  optoelectronic  devices.  Materials  like  MoS₂  and  Bi₂Se₃  exhibit  exceptional  electronic,  and  optical  properties  that  make  them  ideal  candidates  for  a  wide  range  of  applications,  from  biosensing  to  neuromorphic  computing.  This  thesis  explores  the  development  of  layered  semiconducting  materials  in  both  optoelectronic  biosensors  and  memristive  devices.The  presented  dissertation  projects  aim  to  address  part  of  the  aforementioned  challenges  and  realize  the  following  objectives:  (1)  Development  and  optimization  of  2D  material-based  optoelectronic  devices  for  biosensing  applications;  (2)  Experimental  investigation  in  memory  beahviors  of  MoS₂  memristors  for  temporal  information  processing;  (3)  Scalable  fabrication  of  vertically  stacked  Bi₂Se₃  memristor  arrays  using  a  gold-assisted  deposition  strategy;  (4)  Construction  of  Bi₂Se₃  memristors  that  can  realize  hardware  implementation  of  neuromorphic  computing  frameworks  for  robotic  vehicle  control.The  first  part  of  the  thesis  presents  a  study  on  MoS₂-based  optoelectronic  devices  for  biosensing  applications.  In-plane  MoS₂  photodetectors  were  fabricated  and  optimized  for  critical  performance  parameters  including  responsivity  (R),  and  noise  equivalent  power  (NEP).  The  study  identified  that  an  MoS₂  thickness  of  ~15  nm  yields  optimal  performance,  with  R  =  164.3  A/W,  NEP  =  3.99  x  10⁻¹⁷  W/Hz¹ᐟ²,  and  D*  =  5.01  x  10¹⁰  Jones.  A  4  x  4  array  of  optimized  MoS₂  optoelectronic  biosensor  units  was  developed  for  detecting  D-lactate,  achieving  a  limit  of  detection  (LOD)  of  0.87  ±  0.032  x  10⁻³  µg/mL.  The  commercial  potential  of  this  platform  was  further  explored  through  the  NSF  I-Corps  program.The  second  part  of  the  thesis  presents  experimental  and  system-level  studies  on  the  short-term  and  long-term  memristive  switching  behaviors  of  MoS₂-based  devices.  The  devices  exhibited  distinct  pulse-dependent  conductance  modulation  consistent  with  biological  synapses.  These  were  utilized  to  construct  a  temporal  information  processing  system  capable  of  performing  a  rover  collision  avoidance,  demonstrating  the  feasibility  of  hardware-based  neuromorphic  preprocessing.The  third  part  introduces  a  scalable,  gold-assisted  physical  vapor  deposition  (PVD)  method  for  producing  vertically  stacked  Bi₂Se₃  memristor  arrays  without  the  need  for  plasma  etching.  This  method  yielded  uniform  Bi₂Se₃  layer  deposition,  laying  a  strong  foundation  for  system-level  integration.  The  average  grain  size  of  the  Bi2Se3  crystals  grown  on  the  Au  layer  is  ~  450  nm,  which  is  50-folds  larger  than  the  crystal  size  grown  on  the  bare  SiO2  substrate.The  fourth  part  of  the  thesis  presents  the  construction  and  implementation  of  a  fully  hardware-based  reservoir  computing  system  capable  of  controlling  dynamic  systems.  A  Bi₂Se₃  memristive  crossbar  array  exhibited  stable  non-volatile  analog  conductance  modulation  with  long  retention  times  (  1,000  s).  A  fully  hardware-based  readout  layer  was  developed  to  enable  real-time  processing  of  dynamic  inputs  and  generation  of  motor  commands  without  digital  computation.  The  implemented  system  achieved  ultra-low  power  consumption  (~7  µW),  representing  a  substantial  reduction  compared  to  conventional  software-based  controllers.  In  lever  balancing  system,  the  hardware-based  readout  layer  demonstrated  excellent  performance  with  a  low  normalized-root-mean-square-error  (NRMSE)  of  0.094,  validating  its  accuracy  and  efficiency.  The  presented  device  and  system  framework  offers  a  promising  path  toward  constructing  low-power,  hardware-based  reservoir  computing  and  control  systems  suitable  for  a  wide  range  of  miniature  robotic  applications.
■590    ▼aSchool  code:  0127.
■650  4▼aNanotechnology
■650  4▼aNanoscience
■650  4▼aMechanical  engineering
■650  4▼aMaterials  science
■653    ▼aLayered  semiconducting  materials  for  optoelectronic  and  memristive  device  applications
■653    ▼aSilicon
■653    ▼aBiosensing  applications
■653    ▼aTemporal  information
■653    ▼aOptoelectronic  devices
■690    ▼a0652
■690    ▼a0548
■690    ▼a0565
■690    ▼a0794
■71020▼aUniversity  of  Michigan▼bMechanical  Engineering.
■7730  ▼tDissertations  Abstracts  International▼g87-02B.
■790    ▼a0127
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17359786▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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