Transfer printing of metal contacts on organophosphonateself-assembled monolayers
Başlık çevirisi mevcut değil.
- Tez No: 798932
- Danışmanlar: PROF. DR. MARTİN STUTZMANN
- Tez Türü: Yüksek Lisans
- Konular: Fizik ve Fizik Mühendisliği, Physics and Physics Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2018
- Dil: İngilizce
- Üniversite: Technische Universität München
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 139
Özet
Özet yok.
Özet (Çeviri)
The 1950s witnessed the booming of solid state electronics. This was followed by significant advances in molecular electronics in the 1970s, including the first electronic measurement on molecular systems. Attention was being drawn to molecules, to investigate how electrons flow through them. During the last few decades, transistor dimensions have shrunk from ca. 10 μm to 10 nm. Further miniaturization with molecular systems, whose lengths lie in the order of 1 nm, remains a challenge. Understanding of transport mechanisms through such systems is therefore important. In this thesis, the potential of transfer printing (TP) was explored, to prepare metal contacts on molecules and hence analyze charge transport through the latter. IV characteristics of selfassembled monolayers (SAMs) on aluminum oxide substrates were investigated successfully by transfer printing metals onto them as top contacts. Different top contact methods were implemented to compare the effect of contacts on electronic signature of the SAMs. Tunneling decay coefficients for various molecular junctions with SAMs were investigated. In this way, transfer printing (TP) of metals on molecular films are implemented to develop reproducible and reliable solid-state top contacts. Current-voltage measurements through the SAMs were measured at different junction sizes (25x25μm2 , 80x80μm2 , 250x250μm2 , 800x800μm2 ) based on a cross-bar architecture. The conductance of molecular devices was found to be higher for larger area junctions and shorter molecular lengths generally. This finding is attributed to a more efficient tunneling through the SAMs, as a result of the narrowed effective tunneling barriers for SAMs. Rectification ratios of the molecular junctions were investigated to understand the electronic transport through mechanism through the molecular monolayers. Furthermore, the mechanics of transfer printing, 10 electronic structure, and stability of SAMs and thermodynamics of the molecular junctions were explored. Organophosphonates were chosen as building SAMs due to their thermal and chemical stability, availability and their resulting robust SAMs. Alkyl phosphonate SAMs of varying chain lengths (C4bis, C8bis, C10bis, C12bis) were built on aluminum oxide surfaces by immersion. The structure and characteristics of these SAMs (wettability, thickness, surface roughness, spatial arrangement) – which were expected to significantly influence charge transport – were analyzed by ellipsometry, room temperature atomic force microscopy and static water contact angle measurements.
Benzer Tezler
- Fotovoltaik silisyum güneş hücreleri için nikel metal kontak geliştirilmesi
Development of nickel metal contacts for photovoltaic silicon solar cells
BERKELI AKGAYEV
Yüksek Lisans
Türkçe
2024
EnerjiNecmettin Erbakan ÜniversitesiEnerji Sistemleri Mühendisliği Ana Bilim Dalı
DR. ÖĞR. ÜYESİ VEYSEL ÜNSÜR
- TiAlN, AlCrN ve TiSiN Kaplanan 11SMn30/11SMn37 yumuşak manyetik çeliklerinin tribolojik özelliklerinin frenleme performansına etkisi
The effect of tribological properties of TIAlN, AlCrN and TiSiN coated 11SMn30/11SMn37 soft magnetic steels on braking performance
YAĞMUR EYYÜPOĞLU
Yüksek Lisans
Türkçe
2022
Metalurji Mühendisliğiİstanbul Teknik ÜniversitesiMalzeme Bilimi ve Mühendisliği Ana Bilim Dalı
PROF. DR. GÜLTEKİN GÖLLER
- Çamaşır makinesinde yıkama performansını artırmak için geliştirilen vorteks kanat konseptine enerji taşıma alternatifleri
Energy transmission alternati̇ves for vortex paddle concept which are developed to increase washing performance on washing machine
NİHAL YILMAZ
Yüksek Lisans
Türkçe
2018
Makine Mühendisliğiİstanbul Teknik ÜniversitesiMakine Mühendisliği Ana Bilim Dalı
YRD. DOÇ. DR. VEDAT TEMİZ
- Laparoskopik cerrahide akıllı eyleyicili ameliyat aletlerinin tutucu kuvvet kontrolü ve doku ile etkileşmi
Grasping force control and tissue interaction of smart actuated surgical tools in laparoscopic surgery
MİTHAT CAN ÖZİN
Yüksek Lisans
Türkçe
2018
Makine Mühendisliğiİstanbul Teknik ÜniversitesiMakine Mühendisliği Ana Bilim Dalı
DOÇ. DR. İLKER MURAT KOÇ
DR. ÖĞR. ÜYESİ BİLSAY SÜMER
