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Understanding Changes to the Surface of Silver Nanocubes During Their Polyol Synthesis, Processing, and Seeded Growth
Understanding Changes to the Surface of Silver Nanocubes During Their Polyol Synthesis, Pr...
Understanding Changes to the Surface of Silver Nanocubes During Their Polyol Synthesis, Processing, and Seeded Growth

Detailed Information

자료유형  
 학위논문 서양
최종처리일시  
20260202105505
ISBN  
9798263326166
DDC  
600
저자명  
Huang, Qijia.
서명/저자  
Understanding Changes to the Surface of Silver Nanocubes During Their Polyol Synthesis, Processing, and Seeded Growth
발행사항  
[Sl] : Georgia Institute of Technology, 2025
발행사항  
Ann Arbor : ProQuest Dissertations & Theses, 2025
형태사항  
138 p
주기사항  
Source: Dissertations Abstracts International, Volume: 87-05, Section: B.
주기사항  
Advisor: Xia, Younan.
학위논문주기  
Thesis (Ph.D.)--Georgia Institute of Technology, 2025.
초록/해제  
요약Silver nanocubes have been extensively studied owing to their remarkable plasmonic and catalytic properties. Despite the success in synthesis, a detailed understanding of the surface chemistry during and after the synthesis remains elusive. This dissertation leverages the high sensitivity of surface-enhanced Raman scattering (SERS) to probe the native surface of Ag nanocubes. In the first part of my thesis, I investigated Ag nanocubes synthesized using an HCl-mediated polyol method. I provided direct evidence to support the presence of Clon the surface of Ag nanocubes while they were suspended in the original reaction solution by resolving the Ag-Cl vibrational peak. I also investigated the synthesis in the absence of Cl- , proving the crucial role of Clin directing shape evolution. Moreover, I demonstrated that solvents used during sample preparation critically influenced surface chemistry and morphology retention. Acetone facilitated reversible aggregation and co-adsorption of carbonyl groups and Cl- , which suppressed oxidative etching and improved recovery during collection. Subsequent washing with water or ethanol enables effective redispersion while facilitating the desorption of Clions and the adsorption of poly(vinyl pyrrolidone) (PVP). The second part of my thesis investigated surface changes during seed-mediated growth of Ag nanocubes in an aqueous system. SERS revealed ligand exchange between PVP and the Clfrom CTAC, and the deposition of AgCl on Ag seeds. Upon addition of ascorbic acid, electron transfer increased surface electron density, enhancing SERS signals and enabling direct reduction of AgCl into Ag. Collectively, my thesis contributes to a deeper understanding of the mechanisms governing the synthesis and preservation of Ag nanocubes, offering guidance for the rational synthesis of Ag nanocrystals.
일반주제명  
Metals
일반주제명  
Dielectric properties
일반주제명  
Nanoparticles
일반주제명  
Symmetry
일반주제명  
Adsorption
일반주제명  
Silver
일반주제명  
Water
일반주제명  
Decomposition
일반주제명  
Energy
일반주제명  
Aldehydes
일반주제명  
Oxidation
일반주제명  
Surface chemistry
일반주제명  
Electromagnetism
일반주제명  
Electric fields
일반주제명  
Seeds
일반주제명  
Nanocrystals
일반주제명  
Atoms & subatomic particles
일반주제명  
Chemical synthesis
일반주제명  
Extinction
일반주제명  
Agronomy
일반주제명  
Atomic physics
일반주제명  
Nanotechnology
일반주제명  
Chemistry
일반주제명  
Electromagnetics
기타저자  
Georgia Institute of Technology.
기본자료저록  
Dissertations Abstracts International. 87-05B.
전자적 위치 및 접속  
로그인 후 원문을 볼 수 있습니다.

MARC

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■1001  ▼aHuang,  Qijia.
■24510▼aUnderstanding  Changes  to  the  Surface  of  Silver  Nanocubes  During  Their  Polyol  Synthesis,  Processing,  and  Seeded  Growth
■260    ▼a[Sl]▼bGeorgia  Institute  of  Technology▼c2025
■260  1▼aAnn  Arbor▼bProQuest  Dissertations  &  Theses▼c2025
■300    ▼a138  p
■500    ▼aSource:  Dissertations  Abstracts  International,  Volume:  87-05,  Section:  B.
■500    ▼aAdvisor:  Xia,  Younan.
■5021  ▼aThesis  (Ph.D.)--Georgia  Institute  of  Technology,  2025.
■520    ▼aSilver  nanocubes  have  been  extensively  studied  owing  to  their  remarkable  plasmonic  and  catalytic  properties.  Despite  the  success  in  synthesis,  a  detailed  understanding  of  the  surface  chemistry  during  and  after  the  synthesis  remains  elusive.  This  dissertation  leverages  the  high  sensitivity  of  surface-enhanced  Raman  scattering  (SERS)  to  probe  the  native  surface  of  Ag  nanocubes.  In  the  first  part  of  my  thesis,  I  investigated  Ag  nanocubes  synthesized  using  an  HCl-mediated  polyol  method.  I  provided  direct  evidence  to  support  the  presence  of  Clon  the  surface  of  Ag  nanocubes  while  they  were  suspended  in  the  original  reaction  solution  by  resolving  the  Ag-Cl  vibrational  peak.  I  also  investigated  the  synthesis  in  the  absence  of  Cl-  ,  proving  the  crucial  role  of  Clin  directing  shape  evolution.  Moreover,  I  demonstrated  that  solvents  used  during  sample  preparation  critically  influenced  surface  chemistry  and  morphology  retention.  Acetone  facilitated  reversible  aggregation  and  co-adsorption  of  carbonyl  groups  and  Cl-  ,  which  suppressed  oxidative  etching  and  improved  recovery  during  collection.  Subsequent  washing  with  water  or  ethanol  enables  effective  redispersion  while  facilitating  the  desorption  of  Clions  and  the  adsorption  of  poly(vinyl  pyrrolidone)  (PVP).  The  second  part  of  my  thesis  investigated  surface  changes  during  seed-mediated  growth  of  Ag  nanocubes  in  an  aqueous  system.  SERS  revealed  ligand  exchange  between  PVP  and  the  Clfrom  CTAC,  and  the  deposition  of  AgCl  on  Ag  seeds.  Upon  addition  of  ascorbic  acid,  electron  transfer  increased  surface  electron  density,  enhancing  SERS  signals  and  enabling  direct  reduction  of  AgCl  into  Ag.  Collectively,  my  thesis  contributes  to  a  deeper  understanding  of  the  mechanisms  governing  the  synthesis  and  preservation  of  Ag  nanocubes,  offering  guidance  for  the  rational  synthesis  of  Ag  nanocrystals.
■590    ▼aSchool  code:  0078.
■650  4▼aMetals
■650  4▼aDielectric  properties
■650  4▼aNanoparticles
■650  4▼aSymmetry
■650  4▼aAdsorption
■650  4▼aSilver
■650  4▼aWater
■650  4▼aDecomposition
■650  4▼aEnergy
■650  4▼aAldehydes
■650  4▼aOxidation
■650  4▼aSurface  chemistry
■650  4▼aElectromagnetism
■650  4▼aElectric  fields
■650  4▼aSeeds
■650  4▼aNanocrystals
■650  4▼aAtoms  &  subatomic  particles
■650  4▼aChemical  synthesis
■650  4▼aExtinction
■650  4▼aAgronomy
■650  4▼aAtomic  physics
■650  4▼aNanotechnology
■650  4▼aChemistry
■650  4▼aElectromagnetics
■690    ▼a0791
■690    ▼a0285
■690    ▼a0748
■690    ▼a0652
■690    ▼a0485
■690    ▼a0607
■71020▼aGeorgia  Institute  of  Technology.
■7730  ▼tDissertations  Abstracts  International▼g87-05B.
■790    ▼a0078
■791    ▼aPh.D.
■792    ▼a2025
■793    ▼aEnglish
■85640▼uhttp://www.riss.kr/pdu/ddodLink.do?id=T17360312▼nKERIS▼z이  자료의  원문은  한국교육학술정보원에서  제공합니다.

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