研究目的
Investigating the fabrication of TiN nanofiber networks via solution electrowriting for application as transparent electrodes with high transparency, low sheet resistance, and excellent chemical stability under extreme environments.
研究成果
The solution electrowriting technique enables the precise design and manipulation of TiN nanofiber patterns, achieving a combination of high transparency (>90%) and low sheet resistance (10.3 Ω/sq). The TiN nanofiber networks exhibit excellent antioxidative and anticorrosive properties, making them suitable for use as transparent electrodes under extreme environments.
研究不足
The study focuses on the fabrication and characterization of TiN nanofiber networks but does not explore their integration into actual optoelectronic devices. The scalability of the solution electrowriting technique for large-scale production is not addressed.
1：Experimental Design and Method Selection:
Solution electrowriting was used to assemble TiN nanofiber networks with precise geometry patterns. The method involves preparing a sol-gel solution for near-field electrospinning, transferring the solution into an injector, and patterning the precursor nanofiber network on a quartz glass under controlled conditions.
2：Sample Selection and Data Sources:
Precursor solutions were prepared using Polyvinylpyrrolidone (PVP), tetrabutyl titanate (TBT), acetic acid (AcOH), and ethanol (EtOH). The viscosity of the solution was adjusted by changing the polymer concentration.
3：List of Experimental Equipment and Materials:
Rotary Viscometer (NDJ-79) for viscosity testing, Angular contactor (SL150E) for contact angle testing, X-ray diffraction (XRD, X’pert PRO, PANalytical B.V., Netherlands) for composition determination, field emission scanning electron microscopy (FESEM) equipped with energy dispersive spectroscopy (EDS) for morphology and microstructure characterization, four-probe method for sheet resistance testing, and ultraviolet and visible spectrophotometer (UV, LabRAM HR88, Horiba Jobin Yvon) for transmittance testing.
4：Experimental Procedures and Operational Workflow:
The precursor nanofiber network was calcined in air at 500°C followed by calcination in ammonia at 900°C to transform into TiN nanofiber network. Oxidation resistance and corrosion resistance tests were conducted to assess chemical stability.
5：Data Analysis Methods:
The performance of TiN nanofiber networks was evaluated based on transmittance and sheet resistance measurements. The influence of grid spacing on transparency and sheet resistance was analyzed.
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