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Surface Functionalization at the Nanoscale for Interfacing With Biological Systems
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
저자명  
Heidenreich, Liv Katherine.
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  
Small molecule detection
키워드  
Surface science
기타저자  
University of California, Los Angeles Chemistry 0153
기본자료저록  
Dissertations Abstracts International. 86-02B.
전자적 위치 및 접속  
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MARC

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■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.

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