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NIR-II响应性金工程碳化物MXene赋予聚-L-乳酸骨架具有光热抗菌性质

Lin Sun¹, Zihao Zhang¹, Bingxin Sun¹

¹Jiangxi Provincial Key Laboratory of Additive Manufacturing of Implantable Medical Device, Jiangxi University of Science and Technology, Nanchang 330013, China.

|February 13, 2026

概括

纳米颗粒装饰的碳化物 (Pt@V₂C) 增强了治疗骨感染的光热疗法. 这种新型材料集成到PLLA支架中,有效杀死细菌并抑制生物膜的形成,支持骨再生.

科学领域:

生物材料科学生物材料科学
纳米技术纳米技术
整形外科手术整形外科手术

背景情况:

植入物相关的感染对骨再生构成重大挑战.
碳化瓦纳 (V₂C) MXene具有有前途的光热特性,但仅限于NIR-I区域.
将光热疗效扩展到NIR-II窗口对于改善治疗结果至关重要.

研究的目的:

开发纳米粒子装饰的V₂C异构结构 (Pt@V₂C),用于扩展光热活动.
为了制造具有增强光热抗菌能力的聚-L-乳酸 (PLLA) -Pt@V₂C支架.
评估用于骨再生的开发的支架的抗菌疗效,生物膜抑制和生物相容性.

主要方法:

在V₂C上的纳米颗粒在现场生长,以创建Pt@V₂C.
通过选择性激光烧结将Pt@V₂C集成到PLLA中,以形成PLLA-Pt@V₂C支架.
在体外评估光热转换效率,对黄金葡萄球菌和大肠杆菌的抗菌活性,生物膜抑制和细胞活性的体外评估.

主要成果:

优化的PLLA-Pt@V₂C支架在1064nm时实现了创纪录的光热转换效率56.03%.
NIR-II辐射引发了高热 (>52°C) 和OH基的产生,导致99%以上的细菌死亡率.
脚手架显著抑制了生物膜的形成 (>90%的减少),并显示出高细胞活力,支持组织再生.

结论:

Pt@V₂C异构结构有效地将光热反应扩展到NIR-II窗口.
PLLA-Pt@V₂C支架提供强大的光热抗菌活性和生物相容性,用于骨再生.
这一策略提供了一种可行的方法来对抗植入物相关的感染,并促进骨愈合.

关键词:

抗菌脚手架是一种抗菌脚手架.传染性骨缺陷传染性骨缺陷光热疗法是一种光热疗法.金金金是什么意思瓦纳碳化物瓦纳碳化物

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