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- W3048122389 abstract "Abstract Electromagnetically driven drug delivery systems stand out among stimulus‐responsive materials due to their ability to release cargo on demand by remote stimulation, such as light, near infrared (NIR) or microwave (MW) radiation. MW‐responsive soft materials, such as hydrogels, generally operate at 2.45 GHz frequencies, which usually involves rapid overheating of the scaffold and may affect tissue surrounding the target location. In contrast, 915 MHz MW penetrate deeper tissues and are less prone to induce rapid overheating. In order to circumvent these limitations, we present here for the first time a graphene‐based hydrogel that is responsive to MW irradiation of ν =915 MHz. This system is a candidate soft scaffold to deliver a model hydrophobic drug. The graphene present in the hydrogel acts as a heat‐sink and avoids overheating of the scaffold upon MW irradiation. In addition, the microwave trigger stimulates the in vitro delivery of the model drug, thus suggesting a remote and deep‐penetrating means to deliver a drug from a delivery reservoir. Moreover, the MW‐triggered release of drug was observed to be enhanced under acidic conditions, where the swelling state is maximum due to the swelling‐induced pH‐responsiveness of the hydrogel. The hybrid composite described here is a harmless means to deliver remotely a hydrophobic drug on demand with a MW source of 915 MHz. Potential use in biomedical applications were evaluated by cytotoxicity tests." @default.
- W3048122389 created "2020-08-13" @default.
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- W3048122389 date "2020-11-30" @default.
- W3048122389 modified "2023-10-18" @default.
- W3048122389 title "On‐Demand Hydrophobic Drug Release Based on Microwave‐Responsive Graphene Hydrogel Scaffolds" @default.
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- W3048122389 doi "https://doi.org/10.1002/chem.202001429" @default.
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