ItemArticle

Mechanoluminescence of PolymerOrganic Composites under Strain and Hydrostatic Pressure

Title
Mechanoluminescence of PolymerOrganic Composites under Strain and Hydrostatic Pressure
Creator
Das, Avijit Kumar; Kumar, Malavika S.; Mishra, Subhendu; Vishnu, S.; Salian, Raksha D.; Mathias, Royston; Singh, Abhishek Kumar; Kumbhakar, Partha
Description
The development of underwater-based Internet of Things has drawn much attention to fluorescence sensors for crucial technological advancement. Therefore, the technologies for underwater mechanoluminescence (ML) sensing have created various applications for sensors and self-powered waterproof displays. However, developing single-molecule-based intrinsically adaptive materials capable of responding to multiple stimuli with high sensitivity remains a challenge. Herein, a flexible sensor based on the fluorescent ligand DHN was fabricated using a PVDF polymer matrix to form PVDH, enabling the exploration of external-stimuli-responsive fluorescence enhancement under mechanical strain and underwater pressure. For PVDH, the transition from crystalline to amorphous state by mechanical stimuli boosted its photoluminescence by ?75%, and stretching (strain ?16%) the sensor boosted its photoluminescence by ?145%, which is due to the formation of molecular aggregates in the amorphous state. Additionally, the increase in ML correlated with an output voltage of ?4 V of the fabricated device under mechanical stress. The in-depth density functional theory (DFT) calculations further support the experimental observation by studying the charge distribution and orbital overlapping in the DHN ligand. Furthermore, the film shows clear visualization when subject to underwater pressure and stable fluorescence upon exposure to different impurities. Therefore, this study reveals the use of fluorescence and mechanochromic properties of the ligand for designing advanced underwater sensors for visualization and communication. 2025 American Chemical Society
Source
ACS Applied Optical Materials;Volume;4;Issue;1;pp.36-43
Date
01-01-2026
Publisher
American Chemical Society
Subject
DFT; energy generation; fluorescence; mechanoluminescence; underwater fluorescence
Coverage
Das A.K., Department of Chemistry, Christ University, Bangalore, 560029, India; Kumar M.S., Department of Chemistry, Christ University, Bangalore, 560029, India; Mishra S., Materials Research Centre, Indian Institute of Science, Bangalore, 560012, India; Vishnu S., Department of Chemistry, Christ University, Bangalore, 560029, India; Salian R.D., Department of Physics and Electronics, Christ University, Bangalore, 560029, India; Mathias R., Department of Physics and Electronics, Christ University, Bangalore, 560029, India; Singh A.K., Materials Research Centre, Indian Institute of Science, Bangalore, 560012, India; Kumbhakar P., Department of Physics and Electronics, Christ University, Bangalore, 560029, India
Rights
Restricted Access; Hardcopy may be available in the library
Relation
ISSN: 27719855;
Format
online
Language
English
Type
Article

Citation

Das, Avijit Kumar; Kumar, Malavika S.; Mishra, Subhendu; Vishnu, S.; Salian, Raksha D.; Mathias, Royston; Singh, Abhishek Kumar; Kumbhakar, Partha, “Mechanoluminescence of PolymerOrganic Composites under Strain and Hydrostatic Pressure,” CHRIST (Deemed To Be University) Institutional Repository, accessed June 18, 2026, https://archives.christuniversity.in/items/show/22506.

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