高等学校化学学报

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二元混合表面活性剂用于窄吸收金纳米棒的无种子合成

陆峰, 贡祎, 赵婷, 赵宁, 琚雯雯, 范曲立(), 黄维   

  1. 南京邮电大学有机电子与信息显示国家重点实验室培育基地, 江苏省生物传感材料与技术重点实验室, 江苏先进生物与化学制造协同创新中心, 南京 210023
  • 收稿日期:2020-08-14
  • 通讯作者: 范曲立 E-mail:iamqlfan@njupt.edu.cn
  • 基金资助:
    国家自然科学基金(批准号(21975131);21674048)资助

Seedless Synthesis of Gold Nanorods with Narrow Absorption Using Binary Surfactant Mixture

LU Feng, GONG Yi, ZHAO Ting, ZHAO Ning, JU Wenwen, FAN Quli(), HUANG Wei   

  1. Key Laboratory for Organic Electronics and Information Displays & Jiangsu Key Laboratory for Biosensors,Jiangsu National Synergetic Innovation Center for Advanced Materials,Nanjing University of Posts & Telecommunications,Nanjing 210023,China
  • Received:2020-08-14
  • Contact: FAN Quli E-mail:iamqlfan@njupt.edu.cn
  • Supported by:
    ? Supported by the National Natural Science Foundation of China(21975131)

摘要:

利用十六烷基三甲基溴化铵(CTAB)和油酸钠(NaOL)二元混合表面活性剂体系, 开发了一种高质量金纳米棒(AuNRs)的无种子合成方法. 通过透射电子显微镜(TEM)、 紫外-可见-近红外吸收光谱(UV-Vis-NIR)和热成像仪对金纳米棒的形貌、 光学性质及光热性能进行了表征. 实验结果表明, 当NaOL浓度为8.21~11.5 mmol/L时, 能够获得形貌均匀的AuNRs, 其纵向表面等离子体共振吸收(LSPR)在650~1150 nm范围内可调. 该方法制得的样品具有较窄的LSPR半峰宽, 特别是在制备LSPR在近红外二区(NIR-II, 大于1000 nm)的AuNRs方面具有明显优势. 在1064 nm激光的辐照下, 金纳米棒溶液能够快速升温至67 ℃, 光热转换效率可达31.5%, 同时表现出优秀的光热稳定性, 在近红外二区光声成像和光热治疗方面具有良好的应用价值.

关键词: 金纳米棒, 无种子合成, 油酸钠, 光热治疗, 近红外二区

Abstract:

A seedless synthetic method was developed for the preparation of high-quality gold nanorods(AuNRs) using binary surfactant mixture containing hexadecyltrimethylammonium bromide(CTAB) and sodium oleate(NaOL). The morphologies, optical properties and photothermal performances were charac- terized by means of transmission electron microscopy(TEM), UV-Vis-NIR spectroscopy and infrared thermal imaging system. The results indicate that uniform AuNRs can be obtained with a NaOL concentration between 8.21—11.5 mmol/L, and their longitudinal surface plasmon resonance(LSPR) wavelength can be tuned from 650 nm to 1150 nm. The AuNRs prepared with this method exhibited narrow LSPR peak, especially in the second near infrared-Ⅱ region(NIR-Ⅱ, λ>1000 nm). Under the irradiation of 1064 nm laser, the temperature of AuNRs solution can increase to 67 ℃, with a photothermal conversion efficiency of 31.5%. The AuNRs also exhibited excellent photothermal stability under laser irradiation, which can be useful for photoacoustic imaging and photothermal therapy in the second near-infrared region.

Key words: Gold nanorods, Seedless synthesis, Sodium oleate, Photothermal therapy, Near infrared-Ⅱ (NIR-Ⅱ) region

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