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Yang Yang Li group

Intro block Biomineralization, Surface-enhanced Raman spectroscopy, and Electrochemistry

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Introduction to the laboratory

Welcome to Yang Yang Li 's Group !

 

     

    Dr. Yang Yang Li (李扬扬)

     Room BOC-R7142, 7/F Red Zone, Yeung Kin Man Academic Building (Academic Building 1)

     Department of Materials Science & Engineering

     City University of Hong Kong

     83 Tat Chee Avenue, Kowloon, Hong Kong SAR, China

     Tel: +852 34427810 ; Email: yangli@cityu.edu.hk

 

Dr. Yang Yang Li is currently an associate professor at the Department of Materials Science and Engineering of CityU. Dr. Li received her B.S. degree from Peking University, M.S. degree from the National University of Singapore, and Ph.D degree from the University of California, San Diego. She worked as a Research Scientist at Hitachi Chemical Research Center, Irvine, CA, before joining CityU in 2007.

Dr. Li’s research interest lies in i) biomineralization mechanisms and green processing of ceramics; ii) sensors, particularly surface-enhanced Raman spectroscopy (SERS) probes for food safety, environmental, and biomedical applications; iii) electrochemistry of materials for electrocatalysis and charge storage. Dr. Li has published over 130 peer-reviewed papers in mainstream journals (such as Science, Adv. Mater., Adv. Funct. Mater., Angew Chem. In. Ed., and ACS Nano, as the 1st author or corresponding author), been granted over 20 US or Chinese patents, and served as an organizer or co-organizer at several international conferences (e.g., Symposium of Titanium Oxides at the MRS spring meeting, US, 2016).

 

Welcome to join us as a PhD Student or Postdoc Researcher!

For PhD applicants:

To meet the basic requirements of CityU admission, English proficiency test results must be provided.

PhD Minimum Entrance Requirements     https://www.cityu.edu.hk/pg/research-degree-programmes/entrance-requirements

English Proficiency Requirement of College of Engineering:
---a minimum TOEFL score of 550 (paper-based) or 213 (computer-based) or 79 (internet-based); or
---a minimum overall band score of 6.5 in IELTS; or
---a score of 490 in the Chinese mainland’s College English Test Band 6; or
---other test scores that may be regarded as equivalent to TOEFL 550 (paper-based) or 213 (computer-based) or 79 (internet-based).

 

1. To apply for the PhD scholarship in a normal run  (https://banweb.cityu.edu.hk/pls/PROD/hwskalog_cityu.P_DispLoginNon)    PhD Awards and Scholarships

The Studentship rate for 2023/24 is HK$17,800 per month (~US$ 2,282 or RMB 16,600). The maximum award period is up to 4 years for full-time PhD students. Studentships are subject to revision in September each year, and any revision to the rate will apply to both current and new students. 

2. For applicants with a very strong academic background, you are encouraged to apply for Hong Kong PhD Fellowship Scheme (https://www.cityu.edu.hk/pg/hong-kong-phd-fellowship-scheme)
The Fellowship provides awardees with a monthly stipend of HK$ 27,600 (~US$ 3,538 or RMB 25,700) and a conference and research related travel allowance of HK$13,800 (~US$1,760) per year for a maximum of three years.

 

If you are interested, please contact Prof. Li by email (yangli@cityu.edu.hk).

 

Two-dimensional mineral hydrogel-derived single atoms-anchored heterostructures for ultrastable hydrogen evolution

A crystal glass–nanostructured Al-based electrocatalyst for hydrogen evolution reaction

Water-assisted sintering of silica: Densification mechanisms and their possible implications in biomineralization

Details are in the caption following the image

Taking silica as an exemplary material system, we studied water-assisted densification behaviors of different crystallinities (quartz, glass, and vitreous silica). To avoid the complexity in data interpretation, we adopted a simple procedure similar to those used for pressing salt pellets for IR: compressing silica powders in a mold with pure water under ambient conditions. It is discovered that crystalline silica is compacted through liquid lubrication, while amorphous silica's densification behaviors contradict the widely regarded dissolution-reprecipitation mechanism. Another mechanism is thus proposed: stress-driven water incorporation into the solid structures produces hydrated silica of considerable plasticity for deformation and fusion. Inspired by this water-assisted mechanism, a more effective sintering method is developed via repetitive stressing/destressing treatments at room temperature, enabling dramatically boosted densities (e.g., over 90% with transparent appearance for silica glass) and enhanced mechanical performance. This generic strategy may apply to a wide range of materials. Furthermore, the hydration-enabled deformation/sintering mechanism proposed in this work offers fresh insights into the biomineralization puzzles, particularly those on how life accomplishes some of the most challenging tasks faced by humans in modern ceramic technology, for example, to fuse, mend or reshape the rigid brittle ceramic objects in aqueous environments under ambient conditions. This purely inorganic biomineralization mechanism may be particularly important for life at its early stage of evolution on earth.

https://doi.org/10.1111/jace.18268

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