研究目的
An experimental study of the self-organization of fullerene C60 molecules in initially molecular solutions prepared by a nonequilibrium method, and to receive nanocoating of porous fractal aggregates of nC60 on the glass substrate surface.
研究成果
Self-assembled nanostructured aggregates of fullerene nC60 of fractal and close-packed types were successfully synthesized and studied. The proposed methods for synthesis and nanocoating production are useful for applications in nanotechnology, solar energy, and electronics. The aggregates remain stable for at least 6 months, and the fractal dimension was determined to be approximately 2.151.
研究不足
The study is limited to specific solvent mixtures and concentrations; other solvents or conditions may yield different results. The nonequilibrium method may not be universally applicable, and long-term stability beyond 6 months was not tested. Equipment sensitivity and resolution could affect accuracy in nanoscale measurements.
1：Experimental Design and Method Selection:
The study used a nonequilibrium method for preparing fullerene C60 solutions in two-component organic solvents (toluene and tetrahydrofuran) to synthesize nanoporous and close-packed aggregates. High-resolution transmission electron microscopy (TEM) and atomic force microscopy (AFM) were employed to study structural and dimensional features. UV-Vis spectroscopy was used for electronic absorption spectra analysis.
2：Sample Selection and Data Sources:
Crystalline powders of fullerene C60 (purity >99.8%) from SES Research (USA) and organic solvents toluene and tetrahydrofuran (purity 99.9%) from Sigma-Aldrich (USA) were used. Solutions were prepared with specific concentrations (e.g., ~1.25 mol/m3 and ~1.67 mol/m3).
3：8%) from SES Research (USA) and organic solvents toluene and tetrahydrofuran (purity 9%) from Sigma-Aldrich (USA) were used. Solutions were prepared with specific concentrations (e.g., ~25 mol/m3 and ~67 mol/m3). List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Electronic scales EP 214C (Ohaus Explorer Pro, Switzerland), programmable rotator Multi RS-60 (BioSan), TEM LEO-912 AB (ZEISS, Germany), AFM Solver Next (NT-MDT, Russia), UV-Vis spectrometer UV-2700 (Shimadzu, Japan), automated device Vitrification Robot (ZEISS, Germany), glass flasks, dielectric glass substrates (K-8 grade).
4：Experimental Procedures and Operational Workflow:
Fullerene C60 powders were weighed and dissolved in solvent mixtures using continuous stirring on a rotator. Solutions were stored at room temperature. TEM images were obtained by high-speed freezing of thin solution layers. AFM images were taken after transferring drops to glass substrates and evaporating solvents. UV-Vis spectra were recorded at various concentrations and storage times.
5：Data Analysis Methods:
Structural features and dimensions of aggregates were analyzed from TEM and AFM images. Fractal dimension was calculated using theoretical models. UV-Vis spectra were analyzed for absorption band changes.
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Transmission electron microscope
LEO-912 AB
ZEISS
High-resolution imaging of nanostructured aggregates
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UV-Vis spectrometer
UV-2700
Shimadzu
Recording electronic absorption spectra of solutions
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Automated device
Vitrification Robot
ZEISS
High-speed freezing of thin solution layers for TEM imaging
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Electronic scales
EP 214C
Ohaus Explorer Pro
Weighing crystalline powders of fullerene C60 with high accuracy
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Programmable rotator
Multi RS-60
BioSan
Continuous stirring of solutions in hermetically sealed flasks
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Atomic force microscope
Solver Next
NT-MDT
Imaging with atomic resolution, used for 3D analysis of aggregates
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Fullerene C60
SES Research
Base material for synthesis of aggregates
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Toluene
Sigma-Aldrich
Organic solvent used in solution preparation
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Tetrahydrofuran
Sigma-Aldrich
Organic solvent used in solution preparation
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Dielectric glass substrate
K-8 grade
Surface for depositing nanocoating
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