光热治疗
材料科学
光热效应
透射率
光电子学
热的
生物医学工程
复合材料
纳米技术
光学
医学
物理
气象学
作者
Yanji Chu,Qi Wang,Sang Woo Lyu,Bin Yuan,Jiahao Huang,Ji Li,Yapei Wang
出处
期刊:Small
[Wiley]
日期:2024-03-08
标识
DOI:10.1002/smll.202312140
摘要
Abstract Uncontrolled and excessive photothermal heating in photothermal therapy (PTT) inevitably causes thermal damage to surrounding normal tissues, severely limiting the universality and safety of PTT. To address this issue, an intelligent cooling thermal‐responsive (ICTR) gel containing poly(N‐isopropylacrylamide‐co‐acrylamide) (P(NIPAM‐AM))microgel is applied onto the skin to realize intelligent PTT, which can avoid excessive heating and accidental injury. The high near‐infrared (NIR) light transmittance (> 95%) of the ICTR gel ensures effective light delivery at low temperatures, while the refractive index of the P(NIPAM‐AM) microgel increases remarkably when the temperature exceeds a predetermined threshold, resulting in progressively enhanced light scattering and weakened photothermal conversion. In animal studies, the negative feedback regulation of ICTR gel on light transmittance and photothermal heating allows the photothermal temperature in the lesion site to be stabilized within the effective therapeutic range (45 °C) while ensuring that the skin surface temperature does not exceed 35 °C. Compared with the severe skin thermal damage found in the histological staining of mice skin receiving conventional PTT, the mice skin receiving the ICTR gel‐enabled intelligent PTT remains in good condition. This study establishes an intelligent and universal paradigm for PTT thermal regulation, which is of great significance for achieving safe and effective PTT.
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