研究目的
Investigating the optical limiting properties of hybrid nickel naphthalocyanine-titania nanoparticles thin films for potential applications in protecting human eyes and optical sensors against laser radiation.
研究成果
The hybrid NiNc-TiO2 multilayer films exhibit notable optical limiting response, strongly enhanced compared to both TiO2 and NiNc-only samples. The enhanced nonlinearity is due to the aggregation induced functionalization between NiNc and TiO2. This study provides a robust and efficient strategy for fabricating highly homogeneous thin films with superior optical limiting response.
研究不足
The study focuses on the optical limiting properties under specific conditions (600 nm with 18 ps laser pulses). The damage threshold and the practical application in different environments or under different laser conditions are not extensively explored.
1：Experimental Design and Method Selection:
The hybrid films are fabricated by the LBL self-assembly technique. UV–Vis spectroscopy, XPS, and AFM are utilized to characterize the film. The optical limiting properties are investigated through intensity-dependent transmittance measurements at 600 nm with 18 ps laser pulses.
2：Sample Selection and Data Sources:
The samples used are ultrathin nanocomposite films containing tetracarboxylic Nickel (Ⅱ) naphthalocyanine (NiNc) and titania nanoparticles.
3：List of Experimental Equipment and Materials:
Perkin-Elmer Lambda 900UV/Vis/NIR spectrometer, RBD upgraded PHI-5000C ESCA system, Nanoscope III instrument, optical ellipsometer (JOBIN YVON UVISEL), pro?le step scanner, mode-locked Nd:YAG laser (EKSPLA PL2143B), optical parametric ampli?er (EKSPLA PG401), silicon photodiodes (Laser Probe, Rjp-765a).
4：Experimental Procedures and Operational Workflow:
The fabrication process involves the electrostatic self-assembled layer-by-layer technique. The nonlinear transmission of the film as a function of the incident pulse energy is determined by measuring the relative pulse energy before and after the sample film.
5：Data Analysis Methods:
The measured nonlinear transmission at various laser irradiance is fitted with the procedure described in Ref. [36,37].
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RBD upgraded PHI-5000C ESCA system
PHI-5000C
Perkin Elmer
X-ray photoelectron spectroscopy (XPS) experiments
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mode-locked Nd:YAG laser
PL2143B
EKSPLA
part of the laser system for nonlinear optical measurements
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optical parametric amplifier
PG401
EKSPLA
part of the laser system for nonlinear optical measurements
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Perkin-Elmer Lambda 900UV/Vis/NIR spectrometer
Lambda 900
Perkin-Elmer
UV–Vis spectra measurements
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Nanoscope III instrument
Nanoscope III
digital instrument
Atomic force microscopy (AFM) images
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optical ellipsometer
UVISEL
JOBIN YVON
determination of the linear refractive coefficient
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silicon photodiodes
Rjp-765a
Laser Probe
measuring the relative pulse energy before and after the sample film
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