Sustainable and industrially scalable ultrasonic liquid phase exfoliation technologies for manufacturing 2D advanced functional materials

Temperature as a key parameter for graphene sono-exfoliation in water (2022)
Journal Article
Kaur, A., Morton, J. A., Tyurnina, A. V., Priyadarshi, A., Holland, A., Mi, J., …Tzanakis, I. (2022). Temperature as a key parameter for graphene sono-exfoliation in water. Ultrasonics Sonochemistry, 90, Article 106187. https://doi.org/10.1016/j.ultsonch.2022.106187

Graphene dispersions in water are highly desirable for a range of applications such as biomedicines, separation membranes, coatings, inkjet printing and more. Recent novel research has been focussed on developing a green approach for scalable product... Read More about Temperature as a key parameter for graphene sono-exfoliation in water.

Multiscale interactions of liquid, bubbles and solid phases in ultrasonic fields revealed by multiphysics modelling and ultrafast X-ray imaging (2022)
Journal Article
Qin, L., Porfyrakis, K., Tzanakis, I., Grobert, N., Eskin, D. G., Fezzaa, K., & Mi, J. (2022). Multiscale interactions of liquid, bubbles and solid phases in ultrasonic fields revealed by multiphysics modelling and ultrafast X-ray imaging. Ultrasonics Sonochemistry, 89, Article 106158. https://doi.org/10.1016/j.ultsonch.2022.106158

The volume of fluid (VOF) and continuous surface force (CSF) methods were used to develop a bubble dynamics model for the simulation of bubble oscillation and implosion dynamics under ultrasound. The model was calibrated and validated by the X-ray im... Read More about Multiscale interactions of liquid, bubbles and solid phases in ultrasonic fields revealed by multiphysics modelling and ultrafast X-ray imaging.

Effect of trace boron on grain refinement of commercially pure aluminum by Al–5Ti–1B (2022)
Journal Article
XIAO, F., WU, M. X., WANG, Y. X., ZHOU, W. Z., WANG, S. B., WANG, D. H., ZHU, G. L., JIANG, M., SHU, D., MI, J. W., & SUN, B. D. (2022). Effect of trace boron on grain refinement of commercially pure aluminum by Al–5Ti–1B. Transactions of Nonferrous Metals Society of China, 32(4), 1061-1069. https://doi.org/10.1016/S1003-6326%2822%2965855-2

The effect of boron content on grain refinement of commercially pure aluminum by Al–5Ti–1B was quantitatively assessed. When the boron content is less than 0.03 wt.%, the refining performance of Al–5Ti–1B gradually is weakened as the boron content in... Read More about Effect of trace boron on grain refinement of commercially pure aluminum by Al–5Ti–1B.

Effect of Temperature and Acoustic Pressure During Ultrasound Liquid-Phase Processing of Graphite in Water (2021)
Journal Article
Morton, J. A., Eskin, D. G., Grobert, N., Mi, J., Porfyrakis, K., Prentice, P., & Tzanakis, I. (2021). Effect of Temperature and Acoustic Pressure During Ultrasound Liquid-Phase Processing of Graphite in Water. JOM Journal of the Minerals, Metals and Materials Society, https://doi.org/10.1007/s11837-021-04910-9

Ultrasound-assisted liquid-phase exfoliation is a promising method for manufacturing two-dimensional materials. Understanding the effect of ultrasonication parameters such as the temperature and input power on the developed pressure field is pivotal... Read More about Effect of Temperature and Acoustic Pressure During Ultrasound Liquid-Phase Processing of Graphite in Water.

Ultrafast synchrotron X-ray imaging and multiphysics modelling of liquid phase fatigue exfoliation of graphite under ultrasound (2021)
Journal Article
Qin, L., Maciejewska, B. M., Subroto, T., Morton, J. A., Porfyrakis, K., Tzanakis, I., …Mi, J. (2022). Ultrafast synchrotron X-ray imaging and multiphysics modelling of liquid phase fatigue exfoliation of graphite under ultrasound. Carbon, 186, 227-237. https://doi.org/10.1016/j.carbon.2021.10.014

Ultrasound-assisted liquid phase exfoliation is a promising method for manufacturing of 2D materials in large scale and sustainable manner. A large number of studies using ex-situ nano/micro structural characterization techniques have been made to in... Read More about Ultrafast synchrotron X-ray imaging and multiphysics modelling of liquid phase fatigue exfoliation of graphite under ultrasound.

Environment friendly dual-frequency ultrasonic exfoliation of few-layer graphene (2021)
Journal Article
Tyurnina, A. V., Morton, J. A., Subroto, T., Khavari, M., Maciejewska, B., Mi, J., …Eskin, D. G. (2021). Environment friendly dual-frequency ultrasonic exfoliation of few-layer graphene. Carbon, 185, 536-545. https://doi.org/10.1016/j.carbon.2021.09.036

Ultrasound-aided liquid phase exfoliation (ULPE) of graphene in pure water is environment-friendly. Two limiting factors of ULPE are the non-uniform thickness of few-layer graphene (FLG) and a relatively low graphene yield. Here we describe ULPE in w... Read More about Environment friendly dual-frequency ultrasonic exfoliation of few-layer graphene.

New insights into sono-exfoliation mechanisms of graphite: In situ high-speed imaging studies and acoustic measurements (2021)
Journal Article
Morton, J. A., Khavari, M., Qin, L., Maciejewska, B. M., Tyurnina, A. V., Grobert, N., …Tzanakis, I. (2021). New insights into sono-exfoliation mechanisms of graphite: In situ high-speed imaging studies and acoustic measurements. Materials Today, 49, 10-22. https://doi.org/10.1016/j.mattod.2021.05.005

The application of ultrasound and acoustic cavitation in liquid exfoliation of bulk layered materials is a widely used method. However, despite extensive research, the fundamental mechanisms remain far from being fully understood. A number of theorie... Read More about New insights into sono-exfoliation mechanisms of graphite: In situ high-speed imaging studies and acoustic measurements.

Ultrasonic exfoliation of graphene in water: A key parameter study (2020)
Journal Article
Tyurnina, A. V., Tzanakis, I., Morton, J., Mi, J., Porfyrakis, K., Maciejewska, B., Grobert, N., & Eskin, D. G. (2020). Ultrasonic exfoliation of graphene in water: A key parameter study. Carbon, 168, 737-747. https://doi.org/10.1016/j.carbon.2020.06.029

Liquid Phase Exfoliation (LPE) is an efficient method for graphene flake exfoliation and considered to be compatible with industrial production requirements. However, most of available LPE methods require the use of harmful and expensive solvents for... Read More about Ultrasonic exfoliation of graphene in water: A key parameter study.

Understanding the Highly Dynamic Phenomena in Ultrasonic Melt Processing by Ultrafast Synchrotron X-ray Imaging (2019)
Book Chapter
Mi, J., Eskin, D., Connolley, T., & Fezzaa, K. (2019). Understanding the Highly Dynamic Phenomena in Ultrasonic Melt Processing by Ultrafast Synchrotron X-ray Imaging. In C. Chesonis (Ed.), Light Metals 2019 (1539-1544). Springer. https://doi.org/10.1007/978-3-030-05864-7_194

In this paper, we present some highlighted findings from our recent research on real-time and in situ studies of the fundamentals of ultrasonic melt processing, including (1) ultrasonic bubble implosion, oscillation in liquid and semi-liquid (semi-so... Read More about Understanding the Highly Dynamic Phenomena in Ultrasonic Melt Processing by Ultrafast Synchrotron X-ray Imaging.