Plasmonic nanocrystals and multi-component nanocrystals for activation of chemical reactions using ultra-short temperature pulses

使用超短温度脉冲激活化学反应的等离子体纳米晶体和多组分纳米晶体

• 批准号: 339871323
• 负责人: Privatdozent Dr. Dirk Dorfs
• 金额: --
• 依托单位: Institut für Physikalische Chemie und Elektrochemie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/339871323?language=en
• 关键词: Plasmonic; nanocrystals; multi; component; activation

Within this project we will investigate how ultra-fast heated plasmonic nanoparticles in colloidal solution affect their environment, and in particular how they affect chemical reactions which take place in their vicinity.Plasmonic nanoparticles can be heated by ultra-short (nanosecond or picosecond) laser pulses extremely fast and extremely strong. Plasmonic nanoparticles possess unique characteristics when being heated by short laser pulses: their extinction coefficients are extremely high, and even under the most intense laser irradiation bleaching hardly occurs during the laser pulse in comparison to other materials. In addition, the spectral position of the plasmon resonance can be adjusted freely by choice of material, size and shape of the particles. As a consequence plasmonic nanoparticles can be heated even by individual picosecond laser pulses by about 1000 K or more; initially without their environment being heated.In this project the impact of such extremely short and extremely localized temperature peaks on chemical reactions of reactants which are also located in the colloidal solutions of such nanoparticles are studied. Therefore, first suitable plasmonic nanoparticles are produced. In addition to traditional noble metal nanoparticles also degenerately doped semiconductor particles are synthesized with plasmon resonances in the near infrared spectral range. Also, multi-component nanoparticles are produced, which consist of a plasmonic part for rapid heating under laser irradiation, and a further part of a catalytically active material. The heat generated by the laser pulse in the plasmonic particles is transferred to the catalytically active part, and at its surface a chemical reaction takes place.Various simple chemical reactions, which occur either directly on the surface of the fast heated nanoparticles or in their immediate vicinity in solution are examined. The conditions are chosen so that macroscopically practically no heating of the solution occurs and only extreme short and highly localized temperature peaks occur. The results of these studies will help to draw conclusions on how the heat conduction takes place in solutions on extremely short time scales and over very short distances. Here also such scenarios are of special interest, in which the particle temperature right after the temperature pulse is well above the boiling point of the solvent, because such scenarios cannot be realized on a macroscopic size scale.

在这个项目中，我们将研究胶体溶液中超快速加热的等离子体纳米粒子如何影响它们的环境，特别是它们如何影响在它们附近发生的化学反应。等离子体纳米粒子可以被超短（纳秒或皮秒）激光脉冲加热，非常快和非常强。等离子体纳米粒子在被短激光脉冲加热时具有独特的特性：它们的消光系数极高，即使在最强的激光照射下，与其他材料相比，在激光脉冲期间也几乎不会发生漂白。此外，等离子体共振的光谱位置可以通过选择颗粒的材料、尺寸和形状来自由调节。因此，等离子体纳米粒子可以加热，甚至由约1000 K或更多的皮秒激光脉冲，最初没有他们的环境被heating.In这个项目中的影响，这种极短的和极其本地化的温度峰值上的化学反应的反应物也位于这种纳米粒子的胶体溶液进行了研究。因此，首先产生合适的等离子体纳米颗粒。除了传统的贵金属纳米颗粒之外，还利用近红外光谱范围内的等离子体共振合成简并掺杂的半导体颗粒。此外，生产多组分纳米颗粒，其由用于在激光照射下快速加热的等离子体部分和催化活性材料的另一部分组成。激光脉冲在等离子体粒子中产生的热量被转移到催化活性部分，并在其表面发生化学反应。各种简单的化学反应，直接发生在快速加热的纳米粒子的表面上或在其附近。在溶液中。选择条件使得宏观上实际上不发生溶液加热，并且仅发生极短且高度局部化的温度峰。这些研究的结果将有助于得出结论，热传导如何发生在极短的时间尺度和非常短的距离的解决方案。在这里，这样的场景也是特别感兴趣的，其中刚好在温度脉冲之后的颗粒温度远高于溶剂的沸点，因为这样的场景不能在宏观尺寸尺度上实现。

项目成果

Nanosecond Pulsed Laser Heated Nanocrystals Inside A Metal Organic Framework Matrix

纳秒脉冲激光加热金属有机框架基质内的纳米晶体

• DOI: 10.1002/cnma.202200169
• 发表时间: 2022
• 期刊: ChemNanoMat
• 影响因子: 3.8
• 作者: M. Niemeyer;P. Bessel;P. Rusch;R. Himstedt;D. Kranz;H. Borg;N. C. Bigall;D. Dorfs
• 通讯作者: D. Dorfs

Nanocrystal Aerogels with Coupled or Decoupled Building Blocks

具有耦合或解耦合构件的纳米晶体气凝胶

• DOI: 10.1021/acs.jpclett.9b02695
• 发表时间: 2019
• 期刊: The Journal of Physical Chemistry Letters
• 作者: P. Rusch;B. Schremmer;C. Strelow;A. Mews;D. Dorfs;N. C. Bigall
• 通讯作者: N. C. Bigall

Revealing the Correlation of the Electrochemical Properties and the Hydration of Inkjet-Printed CdSe/CdS Semiconductor Gels

揭示喷墨印刷 CdSe/CdS 半导体凝胶的电化学性能与水合的相关性

• DOI: 10.1021/acs.langmuir.9b03708
• 发表时间: 2020
• 期刊: Langmuir
• 影响因子: 3.9
• 作者: J. F. Miethe;F. Luebkemann;A. Schlosser;D. Dorfs;N. C. Bigall
• 通讯作者: N. C. Bigall