Photothermal Cellulose-Patch with Gold-Spiked Silica Microrods Based on Escherichia coli

ACS Omega
Soomin HanYounghun Kim

Abstract

Plasmonic-mediated photothermal heating under near-infrared (NIR) irradiation is an emerging key technology in the field of photothermal therapy and chemical reactions. However, there are few reports of photothermal film (dry-type patch), and thus, in this work, we developed the plasmonic-induced photothermal cellulose-patch operating in the NIR region. Hollow and spikelike gold nanostructures, gold-spikes, as plasmonic nanoparticles were prepared and decorated on silica microrods, which were prepared based on a unicellular organism, Escherichia coli, as a framework. In addition, freestanding cellulose-patch was prepared by mixing filter-paper pulp and armored golden E. coli (AGE) microrods. The major absorbing peak of AGE solution was revealed to be 873 nm, and the surface temperature of patch was increased to 264 °C within a very short time (1 min). When NIR laser was irradiated on the patch dipped in the water, the formation of water vapor and air bubbles was observed. The heating efficiency of indirect heat transfer via conduction from patch-to-water was 35.0%, while that of direct heat transfer via radiation from patch in water was 86.1%. Therefore, the cellulose-patch containing AGE microrods has possible applicability to...Continue Reading

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Citations

Jan 13, 2021·ACS Infectious Diseases·Rashin Namivandi-ZangenehCyrille Boyer
Jun 26, 2021·Frontiers in Chemistry·Jeong-Min ParkKi Su Kim
Aug 8, 2021·Molecules : a Journal of Synthetic Chemistry and Natural Product Chemistry·Lijian SunXueren Qian
Dec 12, 2018·Journal of the American Chemical Society·Nicolas MaciaBelinda Heyne

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Methods Mentioned

BETA
surface plasmon resonance
transmission electron microcopy
dynamic light scattering
scanning electron microscopy

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