Understanding the photothermal effect of gold nanostars and nanorods for biomedical applications

Abstract

Photothermal properties of GNSs and GNRs are compared both experimentally and theoretically, and results show that GNSs exhibit a higher molar heating rate than GNRs.

Tumor-tropic endothelial colony forming cells (ECFCs) loaded with near-infrared sensitive Au nanoparticles: A “cellular stove” approach to the photoablation of melanoma

“…Alternatively, the photothermal figure of merit of a colloidal solution can be suitably described by the molar heating rate (MHR) [27] which is defined as the temperature growth rate divided by the molar concentration of Au. In our case, the best fitting of the temperature kinetic recorded at 1 Wcm −2 NIR intensity (Figure 1D), gives an initial growth rate of 0.2°C s −1 .…”

In vitro biomechanical properties, fluorescence imaging, surface-enhanced Raman spectroscopy, and photothermal therapy evaluation of luminescent functionalized CaMoO4:Eu@Au hybrid nanorods on human lung adenocarcinoma epithelial cells

“…Our HNPs have PTT conversion efficiency of 25.6% and a sharp luminescence peak at 615 nm. Recently, Sun et al [36] synthesized GNRs and gold nanostars (GNSs) with strong NIR absorption of ~800 nm 36 . They concluded that pure GNRs show a higher η value, which varies in the range 69.7–94.2%.…”

“…[38] Self-assembled WO 3−x hierarchical nanostructures ranging from 700 to 1400 nm were prepared with η 28% by Hu et al [39], and the same research group prepared CuS NPs with η 38%. [16] Although various nanostructures [16,36,39] have been evaluated as PTT agents, HNPs offer additional favorable properties that enable their use for cancer therapy. More importantly, the HNPs not only have a high η value, but also have good NIR photostability (Figure 3(D)) and fluorescence properties (Figure 2(F)).…”

Gold nanorod–based poly(lactic-co-glycolic acid) with manganese dioxide core–shell structured multifunctional nanoplatform for cancer theranostic applications

“…It was reported that the electromagnetic wave can easily penetrate the sharp tip structure and participate in heat production. 37 Furthermore, a previous study showed that, as a kind of electromagnetic wave, RF can induce LSPR for heat production by using gold nanostars. 38 As shown in Figure 2C, the temperatures increased with an increase in the ARs of AuNRs, demonstrating that AuNRs can be used as an RF-induced thermal-sensitive agent, and the AuNRs with the AR of 4.2:1 were selected for further research.…”