Quantum sensing using NV centers in diamond

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dc.contributor.advisorMaze Ríos, Jerónimo
dc.contributor.authorGonzález Brouwer, Raúl, Manuel
dc.contributor.otherPontificia Universidad Católica de Chile. Facultad de Física
dc.date.accessioned2019-03-29T18:29:20Z
dc.date.available2019-03-29T18:29:20Z
dc.date.issued2018
dc.descriptionTesis (Master in Physics)--Pontificia Universidad Católica de Chile, 2018
dc.description.abstractThis thesis is focused on understanding the interaction of nitrogen vacancy (NV) defect in diamond with its environment as well as its applications in nanotechnology and biophysics. First, we study the hyperfine interaction due to nearby 13C carbon and 15N nitrogen isotopes in the vicinity of the Level Anti-Crossing (LAC), we propose an experimental method at room temperature free of microwave, in which it is possible to find the sign of the Fermi contact term, using the coupling between nuclear spins 1/2 and electronic spin 1. For this, a three-dimensional coil system was constructed to study the fluorescence close to the LAC. Second we describe an experiment in order to use the NV center as a sensor for chemical reactions, in specific to measure the pH and relate it’s macroscopic measurement with experiments like Ramsey interferometry and change in the spectrum, in order to observe changes on the charge state and T∗2 . Finally, we show a way to functionalize a nanodiamond hosting a NV defect, and use it as a biomarker for amyloid β, an Alzheimer desease related compound. We show that using this functionalized nanodiamonds might enable the development of longer experiments in biophysics due to the photostability of the NV defect compared to regular biomarkers that are widely used in biology. This works paves the way for performing unltrasensitive and reliable detection of cells involved in the pathogenesis of the Alzheimer desease.This thesis is focused on understanding the interaction of nitrogen vacancy (NV) defect in diamond with its environment as well as its applications in nanotechnology and biophysics. First, we study the hyperfine interaction due to nearby 13C carbon and 15N nitrogen isotopes in the vicinity of the Level Anti-Crossing (LAC), we propose an experimental method at room temperature free of microwave, in which it is possible to find the sign of the Fermi contact term, using the coupling between nuclear spins 1/2 and electronic spin 1. For this, a three-dimensional coil system was constructed to study the fluorescence close to the LAC. Second we describe an experiment in order to use the NV center as a sensor for chemical reactions, in specific to measure the pH and relate it’s macroscopic measurement with experiments like Ramsey interferometry and change in the spectrum, in order to observe changes on the charge state and T∗2 . Finally, we show a way to functionalize a nanodiamond hosting a NV defect, and use it as a biomarker for amyloid β, an Alzheimer desease related compound. We show that using this functionalized nanodiamonds might enable the development of longer experiments in biophysics due to the photostability of the NV defect compared to regular biomarkers that are widely used in biology. This works paves the way for performing unltrasensitive and reliable detection of cells involved in the pathogenesis of the Alzheimer desease.
dc.format.extentix, 59 páginas
dc.identifier.doi10.7764/tesisUC/FIS/22359
dc.identifier.urihttps://doi.org/10.7764/tesisUC/FIS/22359
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/22359
dc.language.isoen
dc.nota.accesoContenido completo
dc.rightsacceso abierto
dc.subject.ddc610
dc.subject.deweyMedicina y saludes_ES
dc.subject.otherNanodiamanteses_ES
dc.subject.otherEnfermedad de Alzheimeres_ES
dc.titleQuantum sensing using NV centers in diamondes_ES
dc.typetesis de maestría
sipa.codpersvinculados10674
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