Search for dissertations about: "graphene simulation"

Showing result 1 - 5 of 16 swedish dissertations containing the words graphene simulation.

2. 1. Density Functional Theory Calculations for Graphene-based Gas Sensor Technology

   Author : Karim Elgammal; Anna Delin; Giuseppe Iannaccone; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; graphene; ab-initio; humidity; carbon dioxide; substrate; DFT; vdW; first-principle; simulation; calculations; Fysik; Physics;

   Abstract : Nowadays, electronic devices span a diverse pool of applications, especially when getting smaller and smaller satisfying the more than Moore paradigm. To further develop this, studies focusing on material design toward electronic devices are crucial. READ MORE

4. 2. Quantum Transport Theory in Graphene

   Author : Anders Bergvall; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; quantum coherent electron transport; nanoribbons; FT-LDOS; grain boundaries; tight-binding; graphene;

   Abstract : In this thesis, we focus on different aspects of electron transport in nanostructured graphene (such as graphene nanoribbons). Wedevelop and implement numerical methods to study quantum coherent electron transport on an atomistic level, complemented by analytical calculations based on the Dirac approximation valid close to the points $\vec{K}$ and $\vec{K}^\prime$ in the graphene Brillouin zone. READ MORE

5. 3. Graphene field-effect transistors for high frequency applications

   Author : Muhammad Asad; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high frequency; Graphene; transit frequency; transconductance; maximum frequency of oscillation; contact resistance; microwave electronics; field-effect transistors;

   Abstract : Rapid development of wireless and internet communications requires development of new generation high frequency electronics based on new device concepts and new materials. The very high intrinsic velocity of charge carriers in graphene makes it promising new channel material for high frequency electronics. READ MORE

6. 4. Computational Studies of Graphene Growth and Carbonaceous Polyethylene Nanocomposites

   Author : Shayesteh Haghighatpanah; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Carbon Nanotubes; Polyethylene; Molecular Modelling.; Graphene;

   Abstract : Graphene, the youngest allotrope of carbon, has attracted a lot of attention in different fields of science due to its unique electrical, mechanical, and optical properties. Controlling the growth of graphene is a very topical subject and critical for producing material with desired properties since the properties of graphene are highly dependent on its atomic structure and it is often desirable that the material contains very few or (if possible) no defects. READ MORE

7. 5. Computational studies of DNA sequencing with graphene nanopores

   Author : Lijun Liang; Yaoquan Tu; Alexander Lyubartsev; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; DNA sequencing; Graphene nanopore; Molecular dynamic simulation; Kemi; Chemistry;

   Abstract :     The aim of DNA sequencing is to obtain the order of DNA composition comprising the base pairs A (adenine) T (thymine), and C (cytosine) G (guanine). The fast development of DNA sequencing technology allows us to better understand the relationships among diseases, inheritance, and individuality. READ MORE