Valgte projekter F2012

Temperaturstyring vha. flourescencer
Morten Albertsen (s103071) og Rasmus Jensen (s103087)
Vejledere: Anders Wolff og Ivan Perch Nielsen, DTU Nanotech

Resumé: Overordnet ønsker man at kunne lave PCR på en plastic-chip. Heri indgår en opvarmningsprocess vha. laserlys. Da kamrene på chippen er så små, er konventionel temperaturmåling ikke mulig, uden at forstyrre prøven betragteligt. Vores projekt handler om at lave temperaturmålingen/-kontrollen optisk vha. en eller flere flourescenser i kamret. Prøverne er små, så det er vigtigt at temperaturmålingen kan fortages hurtigt, så DNA'en ikke denatureres ved overophedning. Derfor skal systemet være præcist kalibreret.

Prototyping X-ray detector for CubeWatch
Maria Witthøft (s103106) and Andreas Wetche (s093015)
Supervisors: Niels Lund and René Fleron, DTU Space

Abstract: The objective of this project is to investigate and understand the characteristics of a silicon drift detector to be used on a cubesat, DTUsat3, for detecting the inexplicable gamma-ray bursts (GRBs). Based on this, the project aims to determine the optimal design for the silicon wafer detector, in reference to electrode topology, capacity and type, satisfying the predetermined dimensions of the satellite. Comsol Multiphysics will be used to simulate electrode configuration and design while the photolithographic masks are realized using the 2D CAD tool L-Edit. The first and primary aim of this study is a proof of concept. The perspective of the project is to get a better understanding of the physics behind GRBs and in the end (which is way beyond the scope of this project) to use GRBs as cosmological probes, enabling us to enhance our knowledge of the evolution and nature of the early universe.

Bulk and surface waves in ultrasonic acoustofluidics
Christian Søholm Andersen (s103080), Charlie Kieler (s103096)
Supervisor: Henrik Bruus, DTU Nanotech

Abstract: We study ultrasound waves in microchannels, which are used for micro particle separation. [Laurell et al., Analyst, 2004, 129, 938–943] In particular we compare differences between bulk and surfaces acoustic waves by perturbation theory and numerical simulations (COMSOL).