Eksperimenti s tunelskim mikroskopom

diplomsko delo

Neja Benedetič (Author), Bojan Golli (Mentor), Gregor Bavdek (Co-mentor)

Abstract

V diplomskem delu je predstavljena zgodovina razvoja in delovanja tunelskega mikroskopa. Opisani so njegovi sestavni deli, priprava igle in vzorca ter njuno vstavljanje v glavo tunelskega mikroskopa. Predstavljena je tudi priprava mikroskopa za začetek opravljanja meritev in pomembnejši parametri za zajemanje topografije vzorcev. Za razumevanje delovanja tunelskega mikroskopa so opredeljene osnove kvantne mehanike, in sicer načelo nedoločenosti in Schrödingerjeva enačba za tuneliranje. Za analizo zajete topografije na vzorcih HOPG in grafena so prikazani točkovni, linijski in dvodimenzionalni defekti, ki se pojavljajo v trdnih snoveh. V zaključku diplomskega dela je prikazana zajeta topografija na vzorcih HOPG in grafena ter njena analiza. Na vzorcu HOPG sem prepoznala celice, ki predstavljajo posamezne atome ogljika, ter določila velikost posameznih fragmentov. Na vzorcu grafena sem prepoznala defekte na površini, določila dolžine teras ter višine stopnic.

Keywords

tuneliranje;površinski defekti;grafen;HOPG;

Data

Language:	Slovenian
Year of publishing:	2015
Typology:	2.11 - Undergraduate Thesis
Organization:	UL PEF - Faculty of Education
Publisher:	[N. Benedetič]
UDC:	53.086(043.2)
COBISS:	10698569
Views:	941
Downloads:	203
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Experiments with scanning tunneling microscope
Secondary abstract:	The thesis deals with the development of the scanning tunneling microscope through time and its functioning. It describes its constituent parts, the preparation of tip and sample, their placement into the microscope, and the preparation of the microscope for measurement. It also outlines some of the important parameters for obtaining topography of the samples. To understand the functioning of the tunneling microscope, the thesis contains basics of quantum mechanics, such as the uncertainty principle and Schrödinger equation for tunneling. As for the analysis of graphite and HOPG topography, the thesis touches on point, linear and two-dimensional defects that appear on solids surfaces. The conclusion contains the topography of HOPG and graphene samples and its analysis. Observing the HOPG sample, we recognised cells representing individual carbon atoms and determined the size of individual fragments. As for the graphene sample, we identified the defects on its surface and determined terrace sizes and step heights.
Secondary keywords:	physics;experiment;fizika;eksperiment;
File type:	application/pdf
Type (COBISS):	Bachelor thesis/paper
Thesis comment:	Univ. Ljubljana, Pedagoška fak., Matematika in fizika
Pages:	III, 34 str.
ID:	8966546