Hanwei Wang
Postdoctoral Scholar, Electrical Engineering
Bio
I am a postdoctoral researcher with interests in advanced materials and microscopy technologies. My research focuses on applying metamaterials in biomedical applications, particularly for powering implantable microsensors. I also study optical force nanoscopy, investigating how nanostructures generate and manipulate optical forces with high spatial and temporal resolution. Through my work, I aim to integrate material science with medical advancements, contributing to the development of next-generation biomedical devices and sensing applications.
Honors & Awards
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Hong, McCully, and Allen Fellowship, UIUC (2021)
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Yee Memorial Fund Fellowship, UIUC (2022)
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Illinois International Graduate Achievement Award, UIUC (2023)
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Paul D. Coleman Outstanding Research Award, UIUC (2024)
Patents
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Hanwei Wang, Yang Zhao, Yun-Sheng Chen. "United States Patent US20230047663A1 Metasurfaces for high efficiency wireless power transfer systems", University of Illinois, Jul 22, 2022
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Hanwei Wang, Yang Zhao, Yun-Sheng Chen. "United States Patent US20220206089A1 Ultrathin reconfigurable metamaterial for signal enhancement of magnetic resonance imaging", University of Illinois, Dec 23, 2021
All Publications
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Visualizing ultrafast photothermal dynamics with decoupled optical force nanoscopy.
Nature communications
2023; 14 (1): 7267
Abstract
The photothermal effect in nanomaterials, resulting from resonant optical absorption, finds wide applications in biomedicine, cancer therapy, and microscopy. Despite its prevalence, the photothermal effect in light-absorbing nanoparticles has typically been assessed using bulk measurements, neglecting near-field effects. Beyond standard imaging and therapeutic uses, nanosecond-transient photothermal effects have been harnessed for bacterial inactivation, neural stimulation, drug delivery, and chemical synthesis. While scanning probe microscopy and electron microscopy offer single-particle imaging of photothermal fields, their slow speed limits observations to milliseconds or seconds, preventing nanoscale dynamic investigations. Here, we introduce decoupled optical force nanoscopy (Dofn), enabling nanometer-scale mapping of photothermal forces by exploiting unique phase responses to temporal modulation. We employ the photothermal effect's back-action to distinguish various time frames within a modulation period. This allows us to capture the dynamic photothermal process of a single gold nanorod in the nanosecond range, providing insights into non-stationary thermal diffusion at the nanoscale.
View details for DOI 10.1038/s41467-023-42666-9
View details for PubMedID 37949867
View details for PubMedCentralID PMC10638245
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A Comparative Study on Overall Efficiency of Two-Dimensional Wireless Power Transfer Systems Using Rotational and Directional Methods
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
2022; 69 (1): 260-269
View details for DOI 10.1109/TIE.2020.3048317
View details for Web of Science ID 000704120200028
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A Wearable Metasurface for High Efficiency, Free-Positioning Omnidirectional Wireless Power Transfer.
New journal of physics
2021; 23 (12)
Abstract
We introduce a design principle of metasurfaces that can form any desired distribution of magnetic field for high-efficiency wireless power transfer centered at 200 kHz, which can be used to efficiently charge implanted medical devices. This metasurface can improve the power transfer efficiency for both single-user and multi-user cases by over tenfold compared to those without the metasurface. Our design enables a robust field distribution to the positions of the transmitting and receiving coils, as well as the geometric distortions of the metasurface itself, demonstrating feasibilities as a wearable device. With our design, the field distribution and subsequent power division among the multiple users can be readily controlled from equal distribution to any selective user(s). When incorporating a three-dimensional unit cell of the metasurface, we theoretically demonstrate an omnidirectional control of the field orientation to achieve a high-efficiency wireless power transfer for multiple users.
View details for DOI 10.1088/1367-2630/ac304a
View details for PubMedID 34992495
View details for PubMedCentralID PMC8725792
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Robust 3-D Wireless Power Transfer System Based on Rotating Fields for Multi-User Charging
IEEE TRANSACTIONS ON ENERGY CONVERSION
2021; 36 (2): 693-702
View details for DOI 10.1109/TEC.2020.3034794
View details for Web of Science ID 000652806800012
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On-demand field shaping for enhanced magnetic resonance imaging using an ultrathin reconfigurable metasurface
VIEW
2021; 2 (3)
View details for DOI 10.1002/VIW.20200099
View details for Web of Science ID 000664139900008
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Analysis and Performance Enhancement of Wireless Power Transfer Systems With Intended Metallic Objects
IEEE TRANSACTIONS ON POWER ELECTRONICS
2021; 36 (2): 1388-1398
View details for DOI 10.1109/TPEL.2020.3011761
View details for Web of Science ID 000574748200023
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Ultra-high-frequency radio-frequency acoustic molecular imaging with saline nanodroplets in living subjects.
Nature nanotechnology
2021
Abstract
Molecular imaging is a crucial technique in clinical diagnostics but it relies on radioactive tracers or strong magnetic fields that are unsuitable for many patients, particularly infants and pregnant women. Ultra-high-frequency radio-frequency acoustic (UHF-RF-acoustic) imaging using non-ionizing RF pulses allows deep-tissue imaging with sub-millimetre spatial resolution. However, lack of biocompatible and targetable contrast agents has prevented the successful in vivo application of UHF-RF-acoustic imaging. Here we report our development of targetable nanodroplets for UHF-RF-acoustic molecular imaging of cancers. We synthesize all-liquid nanodroplets containing hypertonic saline that are stable for at least 2 weeks and can produce high-intensity UHF-RF-acoustic signals. Compared with concentration-matched iron oxide nanoparticles, our nanodroplets produce at least 1,600 times higher UHF-RF-acoustic signals at the same imaging depth. We demonstrate in vivo imaging using the targeted nanodroplets in a prostate cancer xenograft mouse model expressing gastrin release protein receptor (GRPR), and show that targeting specificity is increased by more than 2-fold compared with untargeted nanodroplets or prostate cancer cells not expressing this receptor.
View details for DOI 10.1038/s41565-021-00869-5
View details for PubMedID 33782588
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Optical force microscopy: combining light with atomic force microscopy for nanomaterial identification
NANOPHOTONICS
2019; 8 (10): 1659-1671
View details for DOI 10.1515/nanoph-2019-0181
View details for Web of Science ID 000488235500005