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Sun, J 
ORCID: https://orcid.org/0009-0007-0042-8276,
2025.
Advanced 2D materials integrated optical and optoelectronic sensors for biochemical sensing.
PhD, Nottingham Trent University.
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Abstract
This thesis presents a systematic investigation on the development of two-dimensional (2D) materials integrated optoelectronic sensors for the advanced biomedical and chemical sensing applications. The major contributions presented in this thesis are summarised as below.
The development of nanotechnologies for the synthesis and characterisation of various 2D materials, including graphene oxide (GO), Ti3C2Tx MXene, black phosphorus (BP), orthorhombic molybdenum trioxide (α-MoO3), BiTiS3, and small gold nanorods (sAuNRs), using a suite of top-down and bottom-up methods. Material properties such as flake thickness, lateral dimension, and surface chemistry were finely tuned to meet the functional demands of different sensing platforms. 2D materials were integrated with optoelectronic devices by the optimised deposition techniques including in-situ layer-by layer (i-LbL) assembly, PMMA-assisted wet transfer, spin coating, and drop casting.
The functionalised nano-photonic platforms were developed to achieve high-performance for biochemical and biomedical applications. A GO-coated long-period grating (LPG) biosensor enabled label-free quantification of breast cancer cell. The first perovskite/graphene heterostructure-based biosensor was proposed for cytokine detection with an ultrahigh sensitivity achieving attomolar level. A hybrid LPG/FBG grating was designed to detect the haemoglobin. A Ti3C2Tx MXene-functionalised fibre-optic FabryPerot interferometer was developed to detect heavy metal ions, demonstrating a high sensitivity with a wide detection range. Additionally, a GO-coated fibre probe was constructed for bioimaging detection, exhibiting strong signal amplification and reusability.
Overall, these results establish a modular and adaptable framework for integrating 2D materials with advanced photonic and optoelectronic devices. The findings highlight the synergy between materials design, device engineering, and application-driven biochemical sensing performance, contributing to the next generation of bio-nanophotonic platforms for early diagnostics, environmental monitoring, and bioimaging applications.
| Item Type: | Thesis |
|---|---|
| Creators: | Sun, J. |
| Contributors: | Name Role NTU ID ORCID |
| Date: | July 2025 |
| Rights: | The copyright in this work is held by the author. You may copy up to 5% of this work for private study, or personal, non-commercial research. Any re-use of the information contained within this document should be fully referenced, quoting the author, title, university, degree level and pagination. Queries or requests for any other use, or if a more substantial copy is required, should be directed to the author. |
| Divisions: | Schools > School of Science and Technology |
| Record created by: | Laura Borcherds |
| Date Added: | 09 Apr 2026 15:58 |
| Last Modified: | 09 Apr 2026 15:58 |
| URI: | https://irep.ntu.ac.uk/id/eprint/55531 |
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