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conferenceseries
.com
Volume 5, Issue 6 (Suppl)
J Mat. Sci.
ISSN: 2321-6212
Advanced Materials 2017
October 26-28, 2017
OCTOBER 26-28, 2017 OSAKA, JAPAN
13
TH
INTERNATIONAL CONFERENCE ON
Advanced Materials and Nanotechnology
Lanthanide luminescence in nanocrystals and layered semiconductor nanosheets for biomedical and
nanophotonic application
Jianhua Hao
Hong Kong Polytechnic University, Hong Kong
T
he ability of lanthanide ions to generate fascinating Near-Infrared (NIR) emissions has played important roles in optical
fiber communication, semiconductor optoelectronic devices, biomedical imaging and bioanalyses. Two aspects of my
group’s recent works on the lanthanide activated advanced materials and nanotechnology will be introduced. Firstly, we have
developed various lanthanide doped nanocrystals for photonic and biological applications. For instance, biosensors with
both high sensitivity and rapid response are greatly desired for enabling rapid and sensitive detection of various virus gene
in a cost-effective way. We have developed lanthanide doped up-conversion nanoprobe/nanoporous membrane to form a
heterogeneous assay. Compared to the homogeneous assay, the limit of detection in the heterogeneous assay is significantly
improved. Secondly, the ultimate goal of making nanoscale electronic and optoelectronic devices greatly stimulates atomically
thin material and heterostructure research. We have introduced lanthanide dopants into two-dimensional (2D) layered
semiconductor nanosheet hosts and realize NIR-to-NIR down and up-conversion photoluminescence. Importantly, the
luminescence of 2D materials simply pumped by a single NIR laser diode can be extended to a wide range of NIR spectrum,
including telecommunication range at 1.55 μm. By considering the abundant energy levels arisen from lanthanide ions, our
works open a door to greatly extend and modulate the luminescence wavelengths of 2D semiconductors, which will benefit for
not only investigating many appealing fundamental issues, but also developing novel nanophotonic devices.
Biography
Jianhua Hao is a Professor and Associate Head of Department of Applied Physics in the Hong Kong Polytechnic University. He has completed his BSc, MSc and
PhD at Huazhong University of Science and Technology. He has published more than 200 SCI papers and is the inventor of several US patents. He serves as an
Editorial Board Member/Senior Editor for several international journals, such as Scientific Reports (NPG) and Advanced Optical Materials.
jh.hao@polyu.edu.hkJianhua Hao, J Mat. Sci. 2017, 5:6
DOI: 10.4172/2321-6212-C1-008