Two dimensional materials for sensing and energy applications
Başlık çevirisi mevcut değil.
- Tez No: 402310
- Danışmanlar: PROF. PRABHAKAR R. BANDARU
- Tez Türü: Doktora
- Konular: Metalurji Mühendisliği, Metallurgical Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2015
- Dil: İngilizce
- Üniversite: University of California San Diego
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Malzeme Bilimi ve Mühendisliği Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 112
Özet
Özet yok.
Özet (Çeviri)
Since the discovery of graphene in 2004, two dimensional materials (2D) have become the focus of tremendous research owing to their unprecedented properties. Atomically thin nature of 2D materials gives rise to unique physicochemical properties, which makes them attractive for flexible electronics, chemical and biological sensing, energy storage, and solar cells. In this dissertation, sensing and energy related applications of 2D materials are studied. In chapter 1, graphene based ammonia sensors are presented, in which nano-structuring graphene significantly improves the sensitivity towards ammonia due to the formation of highly reactive edge defects. It was found that sensitivity could be further enhanced by decoration of Pd nanoparticles on the nano-structured graphene.In chapter 2, hydrogen sensors based on solution processed transition metal dichalcogenides (TMDs) nanosheets-Pd nanoparticles composites are introduced. The sensors can detect hydrogen at room temperature with high sensitivities. The ease of fabrication holds a great potential for low-cost and scalable manufacturing of chemical sensors. In chapter 3, the fabrication and characterization of graphene/Si heterojunction solar cells are described and various methods to improve the power conversion efficiency (PCE) are presented. A single layer graphene is highly transparent; therefore suitable as a transparent Schottky electrode for solar cells. However, the PCEs of the pristine graphene/Si solar cells are low due to the high sheet resistance of graphene as well as the low Schottky barrier height between pristine graphene and Si. We improved the PCE by a magnitude of order (achieving 9% PCE) with Au nanoparticle decoration followed by a nitric acid treatment owing to the dramatic reduction in the series resistance of the cells and the enhanced Schottky barrier height. Furthermore, we used NiO as a transparent and stable hole doping material for graphene, in which NiO doped cell shows enhanced PCE with high stability. In chapter 4, MoS2 nanosheet-Ru nanoparticle composite is introduced as a highly efficient catalyst for hydrogen evolution reaction. The MoS2-Ru composite shows much smaller onset potential and Tafel slope compared to pristine MoS2 nanosheets indicating its superior catalytic performance for hydrogen evolution. The fabrication and characterization of the composite is described and its enhanced catalytic performance is discussed.
Benzer Tezler
- Triboelectric nanogenerators: Harnessing ocean wave energy and exploring fiber-based applications
Triboelektrik nanojeneratörler: Okyanus dalgasından elektrik enerjisi elde etme ve fiber bazlı uygulamaların araştırılması
ONUR DEMİRCİOĞLU
Yüksek Lisans
İngilizce
2024
Bilim ve TeknolojiOrta Doğu Teknik ÜniversitesiMetalurji ve Malzeme Mühendisliği Ana Bilim Dalı
PROF. DR. HÜSNÜ EMRAH ÜNALAN
DOÇ. DR. YUSUF KELEŞTEMUR
- Growth of two-dimensional TMDCs and MXene novel structures for high performance transistor applications
Yüksek performanslı transistör uygulamaları için yenilikçi iki boyutlu geçiş metal kalkojeniti ve MXene yapılarının üretilmesi
MERVE ÖPER
Yüksek Lisans
İngilizce
2020
Elektrik ve Elektronik MühendisliğiEskişehir Teknik ÜniversitesiElektrik-Elektronik Mühendisliği Ana Bilim Dalı
DOÇ. DR. NİHAN KOSKU PERKGÖZ
- Grafen tabanlı alan etkili transistörler
Graphene based field-effect transistors
MERVE AKIN
Yüksek Lisans
Türkçe
2021
Elektrik ve Elektronik MühendisliğiNecmettin Erbakan ÜniversitesiElektrik-Elektronik Mühendisliği Ana Bilim Dalı
PROF. DR. MEHMET AKİF ERİŞMİŞ
- DFT study of the optical properties of triptycene (T)-urea (U) containing compounds and their complexes for targeted analyte sensing
Patlayıcıları algılayan triptesen-üre içeren moleküllerin ve komplekslerinin optik özelliklerinin YFT metodu ile incelenmesi
BELKIS EMANET
Yüksek Lisans
İngilizce
2016
Kimyaİstanbul Teknik ÜniversitesiKimya Ana Bilim Dalı
PROF. DR. MİNE YURTSEVER
- Investigation of electronic, vibrational, mechanic and chemicalproperties of 2D-DLHC CuI crystal
İki boyutlu CuI kristalinin elektronik, titreşimsel,mekanik ve kimyasal özelliklerinin incelenmesi
ALİ CEM DEMİROK
Yüksek Lisans
İngilizce
2023
Kimyaİzmir Yüksek Teknoloji EnstitüsüKimya Ana Bilim Dalı
DOÇ. DR. ONUR BÜYÜKÇAKIR
PROF. DR. HASAN ŞAHİN