Search for dissertations about: "magnetic nanoparticles biosensor"

Showing result 1 - 5 of 7 swedish dissertations containing the words magnetic nanoparticles biosensor.

2. 1. Brownian Relaxation Measurements of Magnetic Nanoparticles: Towards the Development of a Novel Biosensor System

   Author : Andrea Prieto Astalan; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; PSA; Magnetic susceptibility; Brownian relaxation; Biosensor; Prostate specific antigen; Magnetic nanoparticles; Frequency domain; Induction coils; Time domain;

   Abstract : Magnetic measurements of the Brownian relaxation time of thermally blocked magnetic nanoparticles dispersed in a solution have been performed in order to determine the hydrodynamic size distribution of the particles. By measuring changes in the hydrodynamic size of the particles, the ammount of analytes attached to the surface of particles can be determined. READ MORE

4. 2. Differential Magnetic Biosensor using HTS SQUID Gradiometer

   Author : Sobhan Sepehri; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high-Tc SQUID; magnetic bioassay; diagnostics; RCA; microfluidics; magnetic nanoparticle; point-of-care; rolling circle amplification; differential ac susceptibility; biosensor;

   Abstract : A fundamental tool for containing an epidemic outbreak and mitigating its effects is early diagnostics. Currently, most of the diagnostic tests are performed by trained staff in centralized labs, which are expensive and time-consuming to establish and operate. Lack of access to such facilities could have devastating effects. READ MORE

5. 3. Ultra-sensitive measurements of magnetically labelled RCA products in a microfluidic channel using a high-Tc SQUID

   Author : Sobhan Sepehri; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; diagnostics.; high-Tc SQUID; biosensor; magnetic nanoparticle; rolling circle amplification; magnetic bioassay;

   Abstract : The development of a nucleic acid (deoxyribonucleic acid (DNA), ribonucleic acid (RNA)) bioassay based on magnetic nanoparticles (MNPs) with a high-Tc superconducting quantum interference device (SQUID) gradiometer as a magnetic readout is described. The specific binding of the MNPs to the target DNA molecules changes the MNPs size distribution and, therefore, the relaxation dynamics and is measured by magnetic ac susceptometry. READ MORE

6. 4. New Bioanalytical Approaches, Magneto Immunoassays and SIRE Technology Based Biosensors

   Author : Kirstin Kriz; Tillämpad biokemi; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biochemical technology; Biokemisk teknik; antigens; superparamagnetic nanoparticles; magnetic inductance transducer; competitive magneto immunoassay; enzymes; metabolites; differential measurements; SIRE; biosensor;

   Abstract : This thesis presents two new technologies, SIRE technology based biosensors and magneto immunoassays, which can be used for bioanalytical applications. One of the main problems associated with biosensor technology is the instability of the recognition element since it is of biological origin and thus, has a limited lifetime. READ MORE

7. 5. Biosensing platforms using graphene based bioreactive nanostructures with various dimensions

   Author : Yuanyuan Han; Klaus Leifer; Jöns Hilborn; Hu Li; Boukherroub Rabah; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Graphene; nanoparticles; nanostructure; biosensors;

   Abstract : Nanomaterials have brought new aspects and improvements to the biosensing field due to their unique physical and chemical properties that are not shown in the bulk state. This thesis focuses on concepting, developing and testing of biosensors where nanomaterials including graphene gold nanoparticles (AuNPs) and magnetic nanoparticles (MNPs) constitute the biosensors. READ MORE