AI Article Synopsis
- Researchers discovered that near-infrared (NIR) light at 980 nm can trigger the release of substances from polymeric capsules without needing complex or custom materials.
- This method works by having water molecules inside the polymers absorb the light energy and create a thermal change in the material, leading to the release of the encapsulated cargo.
- The study demonstrates that this approach allows for quick and controlled release in both water and living cells, using standard lasers without overheating the surrounding liquid.
Article Abstract
Near-infrared (NIR) light-triggered release from polymeric capsules could make a major impact on biological research by enabling remote and spatiotemporal control over the release of encapsulated cargo. The few existing mechanisms for NIR-triggered release have not been widely applied because they require custom synthesis of designer polymers, high-powered lasers to drive inefficient two-photon processes, and/or coencapsulation of bulky inorganic particles. In search of a simpler mechanism, we found that exposure to laser light resonant with the vibrational absorption of water (980 nm) in the NIR region can induce release of payloads encapsulated in particles made from inherently non-photo-responsive polymers. We hypothesize that confined water pockets present in hydrated polymer particles absorb electromagnetic energy and transfer it to the polymer matrix, inducing a thermal phase change. In this study, we show that this simple and highly universal strategy enables instantaneous and controlled release of payloads in aqueous environments as well as in living cells using both pulsed and continuous wavelength lasers without significant heating of the surrounding aqueous solution.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4046803 | PMC |
| http://dx.doi.org/10.1021/nn500702g | DOI Listing |
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