Institute of Fundamental Technological Research
Polish Academy of Sciences

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Baoyuan Cheng


Recent publications
1.  Li C., Qiu T., Li C., Cheng B., Jin M., Zhou G., Giersig M., Wang X., Gao J., Akinoglu E.M., Highly Flexible and Acid−Alkali Resistant TiN Nanomesh Transparent Electrodes for Next-Generation Optoelectronic Devices, ACS Nano, ISSN: 1936-0851, DOI: 10.1021/acsnano.3c05211, pp.1-10, 2023

Abstract:
Transparent electrodes are vital for optoelectronic devices, but their development has been constrained by the limitations of existing materials such as indium tin oxide (ITO) and newer alternatives. All face issues of robustness, flexibility,conductivity, and stability in harsh environments. Addressing this challenge, we developed a flexible, low-cost titanium nitride (TiN) nanomesh transparent electrode showcasing exceptional acid−alkali resistance. The TiN nanomesh electrode, created by depositing a TiN coating on a naturally cracked gel film substrate via a sputtering method, maintains a stable electrical performance through thousands of bending cycles. It exhibits outstanding chemical stability, resisting strong acid and alkali corrosion, which is a key hurdle for current electrodes when in contact with acidic/alkaline materials and solvents during device fabrication. This, coupled with superior light transmission and conductivity (88% at 550 nm with a sheet resistance of ∼200 Ω/sq), challenges the reliance on conventional materials. Our TiN nanomesh electrode,successfully applied in electric heaters and electrically controlled thermochromic devices, offers broad potential beyond harsh environment applications. It enables alternative possibilities for the design and fabrication of future optoelectronics for advancements in this pivotal field.

Keywords:
transparent electrode, titanium nitride, flexible, corrosion resistant, mesh, smart window

Affiliations:
Li C. - other affiliation
Qiu T. - other affiliation
Li C. - other affiliation
Cheng B. - other affiliation
Jin M. - South China Normal Universit (CN)
Zhou G. - South China Normal Universit (CN)
Giersig M. - IPPT PAN
Wang X. - other affiliation
Gao J. - other affiliation
Akinoglu E.M. - University of Melbourne (AU)
2.  Cheng B., Qiu T., Jin M., Zhou G., Giersig M., Wang X., Akinoglu E.M., Spreading Solution Additives Governs the Quality of Polystyrene Particle-Based Two-Dimensional Opals, LANGMUIR, ISSN: 0743-7463, DOI: 10.1021/acs.langmuir.3c00418, Vol.39, pp.8996-9006, 2023

Abstract:
Two-dimensional polystyrene sphere opals are important materials for nanotechnology applications and fundamental nanoscience research. They are a facile and inexpensive nanofabrication tool, but the quality factor of these opals has drastic differences between reports. Additives like ethanol, ions, and organic molecules in the aqueous particle spreading solution are known to affect the quality factor and growth efficiency of the produced opals. However, a systematic study on the effect and optimization of some of the most effective additives has not been reported until now. Here, we investigate the influence of additives on the growth efficiency and quality factor of such monolayers formed at the air−water interface without the use of a Langmuir−Blodgett trough. The additives induced large variations in the monolayer quality factor and growth efficiency, and we found that the ideal additive content of the spreading agents is 30 wt % < cethanol < 70 wt %, 0 < cHd 2SOd 4 < 30.5 mM, and 0 < csty < 255.0 mM. This study provides a guideline for the rational composition and additive content of the spreading solution to obtain high-quality two-dimensional opals for further applications in nanofabrication and photonics and will enable researchers and application engineers to produce standardized nanofabrication materials.

Affiliations:
Cheng B. - other affiliation
Qiu T. - other affiliation
Jin M. - South China Normal Universit (CN)
Zhou G. - South China Normal Universit (CN)
Giersig M. - IPPT PAN
Wang X. - other affiliation
Akinoglu E.M. - University of Melbourne (AU)

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