Journal
SENSORS
Volume 20, Issue 14, Pages -Publisher
MDPI
DOI: 10.3390/s20143924
Keywords
polysaccharides; chitosan; carrageenan; sensing interaction; optical sensors
Funding
- Universiti Kebangsaan Malaysia [DIP-2019-005]
- Ministry of Higher Education (MOHE) under the Fundamental Research Grant Scheme (FRGS) [FRGS/1/2018/TK04/UKM/02/6]
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The incorporation of a proper sensing material towards the construction of high selectivity optical sensing devices is vital. Polysaccharides, such as chitosan and carrageenan, are among the bio-based sensing materials that are extensively employed due to their remarkable physicochemical attributes. This paper highlights the critical aspects of the design of suitable polysaccharides for the recognition of specific analytes through physical and chemical modifications of polysaccharide structure. Such modifications lead to the enhancement of physicochemical properties of polysaccharides and optical sensor performance. Chitosan and carrageenan are two materials that possess excellent features which are capable of sensing target analytes via various interactions. The interaction between polysaccharides and analytes is dependent on the availability of functional groups in their structure. The integration of polysaccharides with various optical sensing techniques further improves optical sensor performance. The application of polysaccharides as sensing materials in various optical sensing techniques is also highlighted, particularly for metal ion sensing.
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