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Layered Semiconducting Materials for Optoelectronic and Memristive Device Applications
Layered Semiconducting Materials for Optoelectronic and Memristive Device Applications
Detailed Information
- 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
- Silicon
- 기타저자
- University of Michigan Mechanical Engineering
- 기본자료저록
- Dissertations Abstracts International. 87-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520260202105213
■006m o d
■007cr#unu||||||||
■020 ▼a9798291564813
■035 ▼a(MiAaPQ)AAI32271735
■035 ▼a(MiAaPQ)umichrackham006475
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a620.5
■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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