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Carbon Nanotubes on Polymeric Microcapsules: Free‐Standing Structures and Point‐Wise Laser Openings |
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| Authors: | Alexey M. Yashchenok Daniil N. Bratashov Dmitry A. Gorin Maria V. Lomova Anton M. Pavlov Andrei V. Sapelkin Bong Sup Shim Gennady B. Khomutov Nicholas A. Kotov Gleb B. Sukhorukov Helmuth Möhwald Andre G. Skirtach |
| Affiliation: | 1. Faculty of Nano‐ and Biomedical Technologies, Saratov State University, Saratov, 410012 (Russia);2. Department of Interfaces, Max‐Planck Institute of Colloids and Interfaces, Golm/Potsdam, D14476 (Germany);3. School of Engineering & Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS (UK);4. Department of Physics, Queen Mary University of London, Mile End Road, London, E1 4NS (UK);5. Department of Chemistry, University of Michigan, Ann Arbor, MI 48109 (USA);6. Faculty of Physics, Moscow State University, Moscow, 119899 (Russia);7. Institute of Nanotechnologies for Microelectronics, Leninsky Pr. 32a, Moscow 119991 (Russia) |
| Abstract: | Single‐wall carbon nanotubes modified by anionic polyelectrolyte molecules are embedded into the shells of microcapsules. Carbon nanotubes serve as rigid rods in a softer polymeric capsule, which forms a free‐standing shell upon treatment with glutaraldehyde and subsequent drying. The embedded carbon nanotubes exhibit a broad absorption in the UV–near‐infrared part of the spectrum, and that allows point‐wise activation and opening of the microcapsules by laser. Raman signal analysis shows changes of carbon‐nanotube‐specific lines after high‐power laser irradiation, which is characteristic of the formation of disordered carbonlike structures. These polyelectrolyte/carbon nanotube composite capsules represent a novel light‐addressable type of microcontainers. |
| Keywords: | carbon nanotubes laser irradiation Raman spectra free‐standing structures point‐wise effect |