Fluorescent Polymer Nanomaterials for Biosensing and Imaging
Summary
Fluorescent polymer nanomaterials encompass a diverse class of nanoscale constructs—such as conjugated polymer nanoparticles, carbonized polymer dots (CPDs) and polymer‐based quantum dots—that combine the optical versatility of organic fluorophores with the functional tunability of synthetic polymers. Their emission can be modulated across the visible and near-infrared spectrum by controlling polymer composition, crosslink density, heteroatom doping and particle morphology. These materials feature high photostability, low toxicity and facile surface modification, rendering them ideally suited to biosensing applications—ranging from ion and pH detection to enzyme and metabolite monitoring—and to advanced imaging modalities, including two-photon fluorescence and deep-tissue real-time tracking. Strategic design elements such as aggregation-control architectures, confined-domain crosslinking and energy-transfer cascades enable suppression of quenching phenomena and enhancement of quantum yield. Together, these innovations underpin a new generation of polymeric probes that offer sensitive, multiplexed detection of biological targets and non-invasive visualisation of cellular and subcellular processes, with clear implications for diagnostics, guided therapy and point-of-care technologies.
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Fluorescent Polymer Nanomaterials for Biosensing and Imaging publication trend
The graph below shows the total number of articles in fluorescent polymer nanomaterials for biosensing and imaging across all publications each year (not limited to Nature Index journals).
Technical terms
Carbonized polymer dots (CPDs): Nanoscale particles comprising partially carbonised polymer networks that exhibit inherent fluorescence and can be surface-functionalised for specific biointerfaces.
Photoluminescence quantum yield (PLQY): The ratio of emitted to absorbed photons, serving as a key metric for fluorescence efficiency.
Aggregation-induced quenching (AIQ): The reduction of emissive output upon close packing of fluorophores, which can be mitigated by steric hindrance or crosslinking strategies.
Confined-domain crosslink-enhanced emission (CEE): A phenomenon in which spatial restriction of emissive moieties within a crosslinked matrix increases radiative decay and suppresses non-radiative pathways.
Theranostics: An integrated approach combining therapeutic and diagnostic functionalities within a single nanomaterial platform for simultaneous treatment and imaging.
References
- Evolution and Synthesis of Carbon Dots: From Carbon Dots to Carbonized Polymer Dots. Advanced Science (2019).
- Precursor-dependent structural diversity in luminescent carbonized polymer dots (CPDs): the nomenclature. Light: Science & Applications (2021).
- Aggregation and luminescence in carbonized polymer dots. Aggregate (2022).
- Confined-domain crosslink-enhanced emission effect in carbonized polymer dots. Light: Science & Applications (2022).
- Self-Enhanced Carbonized Polymer Dots for Selective Visualization of Lysosomes and Real-Time Apoptosis Monitoring. iScience (2020).
- Green Light-Triggerable Chemo-Photothermal Activity of Cytarabine-Loaded Polymer Carbon Dots: Mechanism and Preliminary In Vitro Evaluation. ACS Applied Materials & Interfaces (2023).
- Nanoscale Carbon-Polymer Dots for Theranostics and Biomedical Exploration. Journal of Nanotheranostics (2021).
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