Synthesis of nanoparticles by laser ablation in liquid method and optical applications

buir.advisorOrtaç, Bülend
dc.contributor.authorTaylan, Umut
dc.date.accessioned2023-08-16T10:03:33Z
dc.date.available2023-08-16T10:03:33Z
dc.date.copyright2023-08
dc.date.issued2023-08
dc.date.submitted2023-08-11
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)
dc.descriptionCataloged from PDF version of article.
dc.descriptionThesis (Master's): Bilkent University, Graduate Program in Materials Science and Nanotechnology, İhsan Doğramacı Bilkent University, 2023.
dc.descriptionIncludes bibliographical references (leaves 92-107).
dc.description.abstractPulsed laser ablation in liquids (PLAL) method is a fast, green, and straightforward method that can be used to synthesize pure nanoparticles free of ligands, capping agents, and waste products. Several types of nanoparticles such as metals, oxides, alloys, semiconductors, composite and compound nanoparticles with spherical or complex morphologies can be synthesized with PLAL method. In this thesis, AuCu nanoparticles for photovoltaic application, AgCu nanoparticles for tunable optical properties, CuS/Cu1.8S nanoparticles for photothermal and photoacoustic application, and (Y0.83Yb0.16Er0.01)2O3 nanoparticles for upconversion photoluminescence application are synthesized. The synthesized AuCu nanoparticles are used in organic solar cells and enhanced the photocurrent production, proven by the 21.4% increase in the power conversion efficiency. AgCu nanoparticles show composition and laser fragmentation dependent tunable surface plasmon resonance between 420 nm – 580 nm, giving 160 nm tunability. These nanoparticles also show complex morphologies with Janus nanoparticle and core-shell type configurations. Copper sulphide nanoparticles show a broad absorbance in the NIR region with absorbance peak at 1183 nm. Nanoparticles with 1 mg/mL concentration show a 52.2 °C temperature increase in 3 minutes of 3.23 W/cm2 1080 nm CW laser irradiation. Photoacoustic imaging experiments where copper sulphide nanoparticles are utilized show a significant contrast enhancement compared to ultrasonic imaging at 1 cm depth. The upconversion nanoparticles show an intense red emission at 651 nm from 980 nm laser irradiation and lowered green emission compared to the target material which shows nanoparticles produce more heat compared to the target which can be useful for photoluminescence – photothermal applications.
dc.description.degreeM.S.
dc.description.statementofresponsibilityby Umut Taylan
dc.embargo.release2024-02-09
dc.format.extentxv, 107 leaves : color illustrations, charts ; 30 cm.
dc.identifier.itemidB162322
dc.identifier.urihttps://hdl.handle.net/11693/112659
dc.language.isoEnglish
dc.publisherBilkent University
dc.rightsinfo:eu-repo/semantics/openAccess
dc.subjectNanoparticles
dc.subjectPulsed laser ablation in liquids
dc.subjectPhotothermal
dc.subjectPhotovoltaic
dc.subjectPhotoacoustic
dc.subjectPhotoluminescence
dc.subjectAlloys
dc.subjectLocalized surface plasmon resonance
dc.subjectCopper sulphide nanoparticles
dc.subjectRare earth oxides
dc.subjectAbsorbance
dc.subjectOptical characterization
dc.titleSynthesis of nanoparticles by laser ablation in liquid method and optical applications
dc.title.alternativeSıvıda lazer ablasyon ile nanoparçacık sentezi ve optik uygulamalar
dc.typeThesis
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