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Title: Multimodal magnetic and luminescent nanomaterials for biomedical and data storage applications
Author: McAdams, Simon G.
ISNI:       0000 0004 7658 0486
Awarding Body: University of Manchester
Current Institution: University of Manchester
Date of Award: 2018
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Multimodal nanomaterials integrate complementary chemical, optical, and physical functionalities into a single nanoscale object, and have potential applications in numerous fields. With a range of optoelectronic properties and a versatile surface chemistry, transition metal chalcogenide nanomaterials are ideal multimodal platforms. In this thesis, colloidal CdSe-based quantum dot nanocrystals and 2H-MoS2 nanosheets were functionalised with thiolated paramagnetic and luminescent species in view of bio-imaging and data processing applications. Firstly, fluorescent CdSe/CdS/ZnS quantum dots were functionalised with a paramagnetic Gd3+ magnetic resonance contrast agent, with the resulting hybrid material displaying an exceptionally high relaxivity per nanoparticle. Secondly, liquid-exfoliated 2H-MoS2 nanosheets were covalently functionalised simultaneously with Eu3+ and Gd3+ complexes. The luminescent and paramagnetic properties of both component lanthanides were maintained post-functionalization, in addition to the semiconductor 2H-MoS2 phase. This work represents the first example of lanthanide complexes being covalently linked to MoS2 nanosheets. Lastly, monofunctionalised {Cr7Ni} molecular nanomagnet rings were grafted to the surface of CdSe/ZnS quantum dots, and retained both the bright optical emission of the quantum dots, and the S = ½ qubit ground state of the {Cr7Ni} rings. This is the first example of nanomagnet functionalised quantum dots, and future studies will investigate photoswitchable quantum dot/qubit hybrids.
Supervisor: Tuna, Floriana Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available
Keywords: Multimodal Nanometerials