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Surface Functionalization at the Nanoscale for Interfacing With Biological Systems
Surface Functionalization at the Nanoscale for Interfacing With Biological Systems
상세정보
- 자료유형
- 학위논문 서양
- 최종처리일시
- 20250211152756
- ISBN
- 9798383693568
- DDC
- 540
- 서명/저자
- Surface Functionalization at the Nanoscale for Interfacing With Biological Systems
- 발행사항
- [Sl] : University of California, Los Angeles, 2024
- 발행사항
- Ann Arbor : ProQuest Dissertations & Theses, 2024
- 형태사항
- 251 p
- 주기사항
- Source: Dissertations Abstracts International, Volume: 86-02, Section: B.
- 주기사항
- Advisor: Weiss, Paul S.
- 학위논문주기
- Thesis (Ph.D.)--University of California, Los Angeles, 2024.
- 초록/해제
- 요약With the development of technology to characterize and to manipulate objects at the nanoscale, our understanding of the world at the molecular level has opened the way for techniques to create functional surfaces that can interact with other small objects such as cells and biological molecules. The focus of the work embodied in this thesis is twofold: firstly, several devices with the intention of introducing genetic cargo into cells and secondly, aptamer field-effect biosensors to detect small molecules such as neurotransmitters. Both applications utilize aspects of chemical functionalization of surfaces at the nanoscale to imbue the desired properties of the devices.Towards the goal of enhancing the throughput of gene therapies for genetic disorders, microfluidic devices assembled on piezoelectric substrates were created. We achieved cellular transfection on a model cell line through optimizing the acoustofluidic manipulation of cells. A parallel approach with the same goal was to functionalize lipid bilayers to the walls of microfluidic cell-squeezing devices, another method of transfection. We demonstrated that lipid bilayers reduced the fouling of proteins and cellular debris in the flow channel which impacts device lifetime.For small-molecule detection, an area of great interest is the study of neurotransmitters in vivo. In the developments of our biosensors, aptamers, or single stranded sequences of DNA, are functionalized to the surface of a semiconductor transistor using a series of organic chemical linkers. These sequences are designed to selectively bind to a target molecule of interest such as serotonin. The sensors monitor the electrical current between electrodes across the semiconductor, which is altered by the chemical binding. In my work, I aimed to enhance the time response for real-time monitoring by incorporating the sensors in a fluidic system to investigate aptamer binding kinetics. Custom electronics to measure the transistors were also built, with an emphasis on multiplexing and portability.
- 일반주제명
- Chemistry
- 일반주제명
- Analytical chemistry
- 일반주제명
- Nanoscience
- 키워드
- Biosensors
- 키워드
- Fluidic devices
- 키워드
- Nanoscience
- 키워드
- Surface science
- 기타저자
- University of California, Los Angeles Chemistry 0153
- 기본자료저록
- Dissertations Abstracts International. 86-02B.
- 전자적 위치 및 접속
- 로그인 후 원문을 볼 수 있습니다.
MARC
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■00520250211152756
■006m o d
■007cr#unu||||||||
■020 ▼a9798383693568
■035 ▼a(MiAaPQ)AAI31555810
■040 ▼aMiAaPQ▼cMiAaPQ
■0820 ▼a540
■1001 ▼aHeidenreich, Liv Katherine.
■24510▼aSurface Functionalization at the Nanoscale for Interfacing With Biological Systems
■260 ▼a[Sl]▼bUniversity of California, Los Angeles▼c2024
■260 1▼aAnn Arbor▼bProQuest Dissertations & Theses▼c2024
■300 ▼a251 p
■500 ▼aSource: Dissertations Abstracts International, Volume: 86-02, Section: B.
■500 ▼aAdvisor: Weiss, Paul S.
■5021 ▼aThesis (Ph.D.)--University of California, Los Angeles, 2024.
■520 ▼aWith the development of technology to characterize and to manipulate objects at the nanoscale, our understanding of the world at the molecular level has opened the way for techniques to create functional surfaces that can interact with other small objects such as cells and biological molecules. The focus of the work embodied in this thesis is twofold: firstly, several devices with the intention of introducing genetic cargo into cells and secondly, aptamer field-effect biosensors to detect small molecules such as neurotransmitters. Both applications utilize aspects of chemical functionalization of surfaces at the nanoscale to imbue the desired properties of the devices.Towards the goal of enhancing the throughput of gene therapies for genetic disorders, microfluidic devices assembled on piezoelectric substrates were created. We achieved cellular transfection on a model cell line through optimizing the acoustofluidic manipulation of cells. A parallel approach with the same goal was to functionalize lipid bilayers to the walls of microfluidic cell-squeezing devices, another method of transfection. We demonstrated that lipid bilayers reduced the fouling of proteins and cellular debris in the flow channel which impacts device lifetime.For small-molecule detection, an area of great interest is the study of neurotransmitters in vivo. In the developments of our biosensors, aptamers, or single stranded sequences of DNA, are functionalized to the surface of a semiconductor transistor using a series of organic chemical linkers. These sequences are designed to selectively bind to a target molecule of interest such as serotonin. The sensors monitor the electrical current between electrodes across the semiconductor, which is altered by the chemical binding. In my work, I aimed to enhance the time response for real-time monitoring by incorporating the sensors in a fluidic system to investigate aptamer binding kinetics. Custom electronics to measure the transistors were also built, with an emphasis on multiplexing and portability.
■590 ▼aSchool code: 0031.
■650 4▼aChemistry
■650 4▼aAnalytical chemistry
■650 4▼aNanoscience
■653 ▼aBiosensors
■653 ▼aFluidic devices
■653 ▼aNanoscience
■653 ▼aSmall molecule detection
■653 ▼aSurface science
■690 ▼a0485
■690 ▼a0565
■690 ▼a0486
■71020▼aUniversity of California, Los Angeles▼bChemistry 0153.
■7730 ▼tDissertations Abstracts International▼g86-02B.
■790 ▼a0031
■791 ▼aPh.D.
■792 ▼a2024
■793 ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17163809▼nKERIS▼z이 자료의 원문은 한국교육학술정보원에서 제공합니다.


