研究目的
Investigating the improvement of spectral, mechanical, and wetting properties of potassium bromide (KBr) materials through surface modification with carbon nanotubes using the laser-oriented deposition method.
研究成果
The study demonstrated that surface modification of KBr with CNTs using the LOD method significantly improves its spectral, mechanical, and wetting properties. This enhancement extends KBr's applicability in optoelectronics, spectroscopy, and biomedical applications. The findings also suggest that similar improvements could be achievable in other materials through nanostructuration.
研究不足
The study focused on surface modification of KBr with CNTs, potentially limiting applicability to other materials. The LOD method, while innovative, may require optimization for different substrates or CNT types. Quantum-chemical simulations were limited to small system sizes due to computational constraints.
1：Experimental Design and Method Selection:
The study employed the laser-oriented deposition (LOD) technique to modify the KBr surface with carbon nanotubes (CNTs) under varying electric fields (100–600 V × cm?1). The method was chosen for its ability to orient CNTs vertically without requiring substrate heating or specific gas compositions.
2：1). The method was chosen for its ability to orient CNTs vertically without requiring substrate heating or specific gas compositions. Sample Selection and Data Sources:
2. Sample Selection and Data Sources: Single-wall carbon nanotubes (SWCNTs) with diameters of 0.7–1.1 nm were used, sourced from Aldrich Co. and Russian CNTs and nanofibers from "Taunit-MD". KBr substrates with polished surfaces, 5 mm thick and 30–35 mm in diameter, were prepared.
3：7–1 nm were used, sourced from Aldrich Co. and Russian CNTs and nanofibers from "Taunit-MD". KBr substrates with polished surfaces, 5 mm thick and 30–35 mm in diameter, were prepared. List of Experimental Equipment and Materials:
3. List of Experimental Equipment and Materials: Equipment included an IR CO2-laser (10.6 μm wavelength, 30 W power), Perkin-Elmer Lambda 9 and Furrier FSM-1202 spectrometers, VIS SP-26 spectrophotometer, POLAM-P312 microscope, PMT-3M microhardness tester, OCA 15EC device for wetting angle measurement, and Solver Next atomic force microscope (AFM).
4：6 μm wavelength, 30 W power), Perkin-Elmer Lambda 9 and Furrier FSM-1202 spectrometers, VIS SP-26 spectrophotometer, POLAM-P312 microscope, PMT-3M microhardness tester, OCA 15EC device for wetting angle measurement, and Solver Next atomic force microscope (AFM). Experimental Procedures and Operational Workflow:
4. Experimental Procedures and Operational Workflow: CNTs were deposited on KBr surfaces under an electric field to ensure vertical orientation. Spectral, mechanical, and wetting properties were then measured and compared with untreated samples.
5：Data Analysis Methods:
Spectral data were analyzed for transmittance changes. Mechanical properties were assessed via microhardness measurements. Wetting angles were measured to evaluate hydrophobicity. Quantum-chemical simulations supported experimental findings.
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Single-wall carbon nanotubes
#704121
Aldrich Co.
Modification of KBr surface to improve spectral, mechanical, and wetting properties
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IR CO2-laser
Laser-oriented deposition of CNTs on KBr surface
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Perkin-Elmer Lambda 9
Perkin-Elmer
Spectrum analysis
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Furrier FSM-1202
Nica-Garant+
Spectrum analysis
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VIS SP-26 spectrophotometer
LOMO
Spectrum analysis in the range of 250–1200 nm
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POLAM-P312 microscope
LOMO
Imaging of pure and CNT-treated materials
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PMT-3M device
LOMO
Microhardness measurement
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OCA 15EC device
LabTech
Wetting angle measurement
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Solver Next atomic force microscope
NT MDT
Surface analysis and roughness estimation
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