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Semiconductor Nanoparticles: From Sy...

Kim, Eun Byoel.

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Semiconductor Nanoparticles: From Synthetic Design to Structure Elucidation.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Semiconductor Nanoparticles: From Synthetic Design to Structure Elucidation./
作者:	Kim, Eun Byoel.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2023,
面頁冊數:	128 p.
附註:	Source: Dissertations Abstracts International, Volume: 85-10, Section: B.
Contained By:	Dissertations Abstracts International85-10B.
標題:	Materials science. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=31229474
ISBN:	9798381974768

Semiconductor Nanoparticles: From Synthetic Design to Structure Elucidation.
Kim, Eun Byoel.

Semiconductor Nanoparticles: From Synthetic Design to Structure Elucidation. - Ann Arbor : ProQuest Dissertations & Theses, 2023 - 128 p.

Source: Dissertations Abstracts International, Volume: 85-10, Section: B.

Thesis (Ph.D.)--University of Illinois at Chicago, 2023.

Semiconductor nanoparticles are of significant interest in the field of material science and have been used in a wide variety of applications. Nanomaterials that display confinement effects that engender size-dependent optical and electronic characteristics are known as quantum dots (QDs).Chapter 1 provides a guide into the universe of semiconductor nanocrystals. It begins with the definition of nanomaterials and a description of the quantum confinement effect, which is the fundamental property that defines QDs. Synthetic methodologies are discussed, including doping. Also presented are material characterization techniques such as optical spectrophotometry and X-ray structural analysis. Furthermore, potential QD applications across various fields are discussed, as well as a comprehensive overview of the subsequent chapters.Chapter 2 describes the synthesis and characterization of copper-doped Cs4PbCl6 nanowires prepared using an organometallic reagent. The photoluminescence properties of the products are extended into the visible region, which affords the potential for solid-state lighting applications. The materials were characterized with structural analysis from powder X-ray diffraction, elemental analysis via X-ray photoelectron spectroscopy, and photoluminescence characterization including lifetime measurements.Chapter 3 focuses on advancing semiconductor nanocrystal synthesis by integrating the cluster-seed method for QD synthesis into a microfluidic platform. The methodology is designed to simplify microfluidic systems for the preparation of colloidal nanomaterials, harnessing the inherent benefits of high reproducibility in continuous flow reactors and the low-temperature nucleation of solid-state materials facilitated by cluster nucleation catalysts. The study examines the optical properties of II-VI semiconductor nanocrystals, investigating variations in nucleating and growing temperatures, reaction times, and cluster concentrations among others. Additionally, mechanistic studies of cluster seeding are discussed.Chapter 4 demonstrates an advanced powder X-ray diffraction analysis approach known as the Warren-Averbach method. This technique enables size characterization depending on the diffraction plane with the advantage of interrogating entire specimens. This chapter provides a detailed explanation of the method using lead chalcogenide nanoparticles as substrates. The Warren-Averbach method is shown to differentiate spherical and cubic shapes from anisotropic morphologies. Also, nanowires created via the oriented attachment mechanism versus the solution-liquid-solid method are distinguished. The experimental results are augmented using simulated diffraction data generated from model structures.Chapter 5 provides a summary of the preceding chapters as well as the next steps.

ISBN: 9798381974768Subjects--Topical Terms:

543314
Materials science.
Subjects--Index Terms:

Quantum dot

Semiconductor Nanoparticles: From Synthetic Design to Structure Elucidation.
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520 $a Semiconductor nanoparticles are of significant interest in the field of material science and have been used in a wide variety of applications. Nanomaterials that display confinement effects that engender size-dependent optical and electronic characteristics are known as quantum dots (QDs).Chapter 1 provides a guide into the universe of semiconductor nanocrystals. It begins with the definition of nanomaterials and a description of the quantum confinement effect, which is the fundamental property that defines QDs. Synthetic methodologies are discussed, including doping. Also presented are material characterization techniques such as optical spectrophotometry and X-ray structural analysis. Furthermore, potential QD applications across various fields are discussed, as well as a comprehensive overview of the subsequent chapters.Chapter 2 describes the synthesis and characterization of copper-doped Cs4PbCl6 nanowires prepared using an organometallic reagent. The photoluminescence properties of the products are extended into the visible region, which affords the potential for solid-state lighting applications. The materials were characterized with structural analysis from powder X-ray diffraction, elemental analysis via X-ray photoelectron spectroscopy, and photoluminescence characterization including lifetime measurements.Chapter 3 focuses on advancing semiconductor nanocrystal synthesis by integrating the cluster-seed method for QD synthesis into a microfluidic platform. The methodology is designed to simplify microfluidic systems for the preparation of colloidal nanomaterials, harnessing the inherent benefits of high reproducibility in continuous flow reactors and the low-temperature nucleation of solid-state materials facilitated by cluster nucleation catalysts. The study examines the optical properties of II-VI semiconductor nanocrystals, investigating variations in nucleating and growing temperatures, reaction times, and cluster concentrations among others. Additionally, mechanistic studies of cluster seeding are discussed.Chapter 4 demonstrates an advanced powder X-ray diffraction analysis approach known as the Warren-Averbach method. This technique enables size characterization depending on the diffraction plane with the advantage of interrogating entire specimens. This chapter provides a detailed explanation of the method using lead chalcogenide nanoparticles as substrates. The Warren-Averbach method is shown to differentiate spherical and cubic shapes from anisotropic morphologies. Also, nanowires created via the oriented attachment mechanism versus the solution-liquid-solid method are distinguished. The experimental results are augmented using simulated diffraction data generated from model structures.Chapter 5 provides a summary of the preceding chapters as well as the next steps.
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