In Situ Visualization of the Local Photothermal Effect Produced on α-Cyclodextrin Inclusion Compound Associated with Gold NanoparticlesReport as inadecuate




In Situ Visualization of the Local Photothermal Effect Produced on α-Cyclodextrin Inclusion Compound Associated with Gold Nanoparticles - Download this document for free, or read online. Document in PDF available to download.

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Evidence of guest migration in α-cyclodextrin-octylamine α-CD-OA inclusion compound IC generated via plasmonicheating of gold nanoparticles AuNPs has been studied. In this report, we demonstrate local effects generated bylaser-mediated irradiation of a sample of AuNPs covered with inclusion compounds on surface-derivatized glass underliquid conditions by atomic force microscopy AFM. Functionalized AuNPs on the glass and covered by the ICs weremonitored by recording images by AFM during 5 h of irradiation, and images showed that after irradiation, a drasticdecrease in the height of the AuNPs occurred. The absorption spectrum of the irradiated sample showed ahypsochromic shift from 542 to 536 nm, evidence suggesting that much of the population of nanoparticles lost allof the parts of the overlay of ICs due to the plasmonic heat generated by the irradiation. Mass spectrometry matrixassistedlaser desorption-ionization-time-of-flight MALDI-TOF performed on a sample containing a collection of dropsobtained from the surface of the functionalized glass provided evidence that the irradiation lead to disintegration ofthe ICs and therefore exit of the octylamine molecule the guest from the cyclodextrin cavity the matrix.Nota general

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Author: Silva, Nataly; - Muñoz, Camila; - Díaz Marcos, Jordi; - Samitier, Josep; - Yutronic Sáez, Nicolás; - Kogan, Marcelo J.; - Jar

Source: http://repositorio.uchile.cl/



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