Field-Induced Assembly of sp-sp2 Carbon Sponges

Abstract

The formation of macroscale carbon structures characterised by an sp-sp2-hybridization is realised by self-assembly in colloidal solutions under an effect of laser irradiation and electromagnetic fields. The sponge-like morphology, sculptured with gold nanoparticles (NPs) was revealed by Scanning Electron Microscopy (SEM) imaging. Full structural and defect characterization of the self-assembled sponges was provided using the micro-Raman spectroscopic technique. The synthesized clusters manifest themselves in the presence of a strong spectral band in the visible range of the photoluminescence spectra that is quite unusual for ordered sp2-carbon systems.

Electrophysics of carbon 1D structures obtained in a laser experiment: models and demonstration

“…Figure 3 displays the modification of Raman spectra of carbon linear structures obtained by us in a colloid, depending on their configuration (cf. [16,25]).…”

“…The polyyne structure of atomic carbon chains is reflected by bands of stretching vibrations of triple bonds (ÀC CÀ) in the range of 2100±2300 cm À1 and bending vibrations at 800 cm À1 [6,9,16,104]. Thus, the shift of this peak (2100± 2300 cm À1 ) to the short-wavelength region during laser irradiation of the colloidal system is explained by a change in the length of the carbon chain.…”

“…A separate issue is the creation of metasurfaces based on such LLCCs (sp-electron configuration) [16] when they are deposited on the surface of a solid substrate, including by the method of a spraying jet [6 ,17].…”

Electrophysics of carbon 1D structures obtained in a laser experiment: models and demonstration

“…°ÕAEÇÎßÐÞÌ ÄÑÒÓÑÔ ÔÄâÊÂÐ Ô ÔÑÊAEÂÐËÇÏ ÏÇÕÂÒÑÄÇÓØ-ÐÑÔÕÇÌ Ð ÑÔÐÑÄÇ ÕÂÍËØ LLCC (sp-àÎÇÍÕÓÑÐÐÂâ ÍÑÐ×ËÅÖ-ÓÂÙËâ) [16] ÒÓË ËØ ÑÔÂÉAEÇÐËË Ð ÒÑÄÇÓØÐÑÔÕß ÕÄÈÓAEÑÌ ÒÑAEÎÑÉÍË, Ä ÕÑÏ ÚËÔÎÇ Ë ÏÇÕÑAEÑÏ, ÐÂÒÓËÏÇÓ, ËÐÉÇÍÙËÑÐ-ÐÑÅÑ ÓÂÔÒÞÎÇÐËâ (spraying-jet) [6,17].…”

“…¯Â ¯Â ÓËÔÖÐÍÇ 3 ÒÓËÄÇAEÇРÏÑAEË×ËÍÂÙËâ ÔÒÇÍÕÓÑÄ ÍÑÏ-ÃËÐÂÙËÑÐÐÑÅÑ ÓÂÔÔÇâÐËâ ÖÅÎÇÓÑAEÐÞØ ÎËÐÇÌÐÞØ ÔÕÓÖÍÕÖÓ, ÒÑÎÖÚÇÐÐÞØ ÐÂÏË Ä ÍÑÎÎÑËAEÇ, Ä ÊÂÄËÔËÏÑÔÕË ÑÕ ËØ ÍÑÐ-×ËÅÖÓÂÙËË (ÔÓ. Ô [16,25]).…”