BEGIN:VCALENDAR VERSION:2.0 X-WR-CALNAME:EventsCalendar PRODID:-//hacksw/handcal//NONSGML v1.0//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/New_York LAST-MODIFIED:20240422T053451Z TZURL:https://www.tzurl.org/zoneinfo-outlook/America/New_York X-LIC-LOCATION:America/New_York BEGIN:DAYLIGHT TZNAME:EDT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 DTSTART:19700308T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU END:DAYLIGHT BEGIN:STANDARD TZNAME:EST TZOFFSETFROM:-0400 TZOFFSETTO:-0500 DTSTART:19701101T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT CATEGORIES:College of Arts and Sciences,Thesis/Dissertations DESCRIPTION:Advisor:  Dr. Wei-Shun Chang Committee Members:  Dr. Brian Bl anchette, Dr. Jamie Lawton Abstract: Anisotropic gold nanoparticles are of significant interest due to their tunable aspect ratios, which directly i nfluence their optical properties and plasmonic behavior. Control over the se parameters enables enhancement of plasmon resonance for applications in catalysis, photochemistry, and nanotechnology. However, a major challenge in nanoparticle assembly is achieving a high yield of dimers while suppre ssing the formation of larger, uncontrolled aggregates. This research focu ses on optimizing reaction conditions to promote selective dimer formation of anisotropic gold nanoparticles through wet chemical methods with parti cular emphasis on pH control and reaction kinetics. By fine-tuning these p arameters, the work aims to regulate interparticle coupling and minimize a ggregation beyond the dimer state. Dimerized nanoparticles enable strong p lasmonic coupling and localized electromagnetic field enhancement, which a re critical for high sensitivity of plasmonic sensing applications. Struct ural and optical characterization was conducted using scanning electron mi croscopy, UV-Vis spectroscopy while dynamic light scattering and circular dichroism is discussed as a complementary technique for evaluating size di stribution, surface charge in solution, and chirality signal. Overall, thi s work provides insight into the controlled formation of gold nanorod dime rs and establishes strategies to enhance yield. Zoom Meeting: Meeting ID: 852 4961 5385 Passcode: cw0NBu\nEvent page: /events /cms/ms-thesis-defense-by-kayla-darosa.php\nEvent link: https://us05web.zo om.us/j/85249615385?pwd=WOarhV9YbHM2bKbbLVjv7hfPQYbRnF.1 X-ALT-DESC;FMTTYPE=text/html:

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Advisor:  Dr. Wei-Shun Chang\n

Committee Members:  Dr. Brian Blanchette\, Dr. Jamie Lawton

\n< p>Abstract: Anisotropic gold nanoparticles are of significant interest due to their tunable aspect ratios\, which directly influence their optical p roperties and plasmonic behavior. Control over these parameters enables en hancement of plasmon resonance for applications in catalysis\, photochemis try\, and nanotechnology. However\, a major challenge in nanoparticle asse mbly is achieving a high yield of dimers while suppressing the formation o f larger\, uncontrolled aggregates. This research focuses on optimizing re action conditions to promote selective dimer formation of anisotropic gold nanoparticles through wet chemical methods with particular emphasis on pH control and reaction kinetics. By fine-tuning these parameters\, the work aims to regulate interparticle coupling and minimize aggregation beyond t he dimer state. Dimerized nanoparticles enable strong plasmonic coupling a nd localized electromagnetic field enhancement\, which are critical for hi gh sensitivity of plasmonic sensing applications. Structural and optical c haracterization was conducted using scanning electron microscopy\, UV-Vis spectroscopy while dynamic light scattering and circular dichroism is disc ussed as a complementary technique for evaluating size distribution\, surf ace charge in solution\, and chirality signal. Overall\, this work provide s insight into the controlled formation of gold nanorod dimers and establi shes strategies to enhance yield.

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Zoom Meeting: Meeting ID: 852 4961 5385 Passcode: cw0NBu

Event page: / events/cms/ms-thesis-defense-by-kayla-darosa.php
Event link: https://us05web.zoom.us/j/85249615385?pwd=WOarhV9YbHM2bKbbLVjv7hfPQYb RnF.1

DTSTAMP:20260519T072240 DTSTART;TZID=America/New_York:20260520T110000 DTEND;TZID=America/New_York:20260520T130000 LOCATION:SENG 305 SUMMARY;LANGUAGE=en-us:MS Thesis Defense by Kayla DaRosa UID:7a4658617efc544784c2ad262781e3ed@www.umassd.edu END:VEVENT END:VCALENDAR