Yudan Zhao

East China Normal University

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Jiaping Wang

Guangdong University of Technology

Kaili Jiang

Tsinghua University

Qunqing Li

Xiamen University

Xiaoyang Xiao

Shenyang Jianzhu University

Shoushan Fan

Tsinghua University

Yuanhao Jin

Collaborative Innovation Center of Quantum Matter

Guanhong Li

National Sun Yat-sen University

Yingcheng Wang

Ministry of Agriculture and Rural Affairs

Jing Sun

East China Normal University

Yuxiao Mei

East China Normal University

Cooperative Institutions

Tsinghua University

Foxconn (China)

Collaborative Innovation Center of Quantum Matter

Second Hospital of Shandong University

Chinese Academy of Sciences

Peking University

Beijing Academy of Quantum Information Sciences

Weifang Medical University

East China Normal University

University of Chinese Academy of Sciences

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Large area nanoscale metal meshes for use as transparent conductive layers

Nanoscale (2015)

Yuanhao Jin Qunqing Li Mo Chen Guanhong Li Yudan Zhao

We report on the experimental realization of using super-aligned carbon nanotubes (SACNTs) as etching masks for the fabrication of large area nanoscale metal meshes.

Realization (probability)

10.1039/c5nr04528b

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Citations (7)

“Bacterial Suicide”: An Aminal-Linked Covalent Organic Polymer with Infection-Microenvironment-Enhanced Synergistic Photothermal and Enzymatic Activities for Wound Therapy

ACS Applied Polymer Materials (2024)

Yuying Wang Jibin Wang Xiaoyan Ding Xinjun Yu Yudan Zhao

The infected microenvironment provides fertile ground for bacterial growth and the progression of inflammation, making it challenging to cure related diseases. Here, a covalent organic polymer (COP)-based antibacterial agent, denoted as PF-COP, was developed. PF-COP has intrinsic photothermal capacity, which allows it to take advantage of the infected microenvironment for enhanced synergistic wound infection therapy. PF-COP was prepared via the copolymerization of piperazine with ferrocene diformaldehyde using catalyst-free aminal chemistry, in which the piperazine units could easily bind with acid to generate the cationic skeleton, while the ferrocene components could convert the endogenous H2O2 into a toxic hydroxyl radical. This effectively regulates the infection of the microenvironment. The acidified positively charged structures could enhance material adhesion with bacterial cell membranes and improve photothermal responsiveness, significantly improving the therapeutic effect. As a result, PF-COP amalgamating photothermal and enzyme catalytic capacities could serve as an infection microenvironment-enhanced therapeutic agent. It could disrupt the balance of the infection microenvironment, destroying the optimal growth environment for bacteria and inducing "bacterial suicide", and regulate the microenvironment to promote the growth of normal cells, thus accelerating the wound healing. Therefore, this work presents a promising construction strategy for the precise development of COP-based therapeutics facilitating wound healing through direct infectious microenvironment utilization and regulation.

Aminal

10.1021/acsapm.4c02607

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Inverse Hysteresis and Ultrasmall Hysteresis Thin‐Film Transistors Fabricated Using Sputtered Dielectrics

Advanced Electronic Materials (2017)

Yudan Zhao Yujia Huo Xiaoyang Xiao Yingcheng Wang Tianfu Zhang

Large current hysteresis is observed in carbon nanotube (CNT) transistors and usually shows as a positive threshold voltage shift when the gate sweeping direction changes from positive to negative. This paper reports fabrication of inverse hysteresis CNT thin‐film transistors (TFTs) using magnetron sputtered oxide as a dielectric. Stacking of the sputtered dielectric with dielectrics deposited by other methods, such as atomic layer deposition, can effectively reduce or even eliminate the hysteresis. This can be explained as a combination of the effects of surface and interface trapped charges. Additionally, this hysteresis reduction method is widely compatible with various CNT‐TFT structures and types and is even suitable for MoS 2 TFTs. The output characteristics and frequency responses of large and small hysteresis devices are compared and show that the small‐hysteresis inverter has lower distortion, and that its maximum operating frequency is nearly five times larger than that of TFTs with normal hysteresis.

Hysteresis

10.1002/aelm.201600483

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Citations (9)

Study of Carbon Nanotubes as Etching Masks and Related Applications in the Surface Modification of GaAs‐based Light‐Emitting Diodes

Small (2015)

Yuanhao Jin Qunqing Li Mo Chen Guanhong Li Yudan Zhao

The surface modification of LEDs based on GaAs is realized by super-aligned multiwalled carbon nanotube (SACNT) networks as etching masks. The surface morphology of SACNT networks is transferred to the GaAs. It is found that the light output power of LEDs based on GaAs with a nanostructured surface morphology is greatly enhanced with the electrical power unchanged.

Surface Modification

Morphology

Carbon fibers

10.1002/smll.201500869

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Three-Dimensional Flexible Complementary Metal–Oxide–Semiconductor Logic Circuits Based On Two-Layer Stacks of Single-Walled Carbon Nanotube Networks

ACS Nano (2016)

Yudan Zhao Qunqing Li Xiaoyang Xiao Guanhong Li Yuanhao Jin

We have proposed and fabricated stable and repeatable, flexible, single-walled carbon nanotube (SWCNT) thin film transistor (TFT) complementary metal−oxide−semiconductor (CMOS) integrated circuits based on a three-dimensional (3D) structure. Two layers of SWCNT-TFT devices were stacked, where one layer served as n-type devices and the other one served as p-type devices. On the basis of this method, it is able to save at least half of the area required to construct an inverter and make large-scale and high-density integrated CMOS circuits easier to design and manufacture. The 3D flexible CMOS inverter gain can be as high as 40, and the total noise margin is more than 95%. Moreover, the input and output voltage of the inverter are exactly matched for cascading. 3D flexible CMOS NOR, NAND logic gates, and 15-stage ring oscillators were fabricated on PI substrates with high performance as well. Stable electrical properties of these circuits can be obtained with bending radii as small as 3.16 mm, which shows that such a 3D structure is a reliable architecture and suitable for carbon nanotube electrical applications in complex flexible and wearable electronic devices.

10.1021/acsnano.5b06726

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Citations (71)

A Supramolecular Fluorescent Chemosensor Enabling Specific and Rapid Quantification of Norepinephrine Dynamics

Journal of the American Chemical Society (2025)

Yudan Zhao Yuxiao Mei Jing Sun Yang Tian

Host-guest supramolecular fluorescence probes have garnered significant attention in the detection and sensing of bioactive molecules due to their functionalization potential, adjustable physical properties, and high specificity. However, such probes that reliably, rapidly, and specifically measure neurotransmitter dynamics at the cellular and in vivo level have yet to be reported. Herein, we present a supramolecular fluorescent chemosensor designed for norepinephrine (NE) detection, showing an exceptional response and specificity through host-guest complexation. Multiple covalent/noncovalent interactions, molecular-folding, and confinement effect in the system synergistically enhance selectivity and accelerate reaction kinetics down to 190 ms. Our chemosensor enables real-time quantification and imaging of NE across various models including neuronal cytomembranes, brain tissues, and zebrafish. Notably, we successfully monitored NE levels in 26 brain regions of freely moving mice under fear-induced stress, revealing elevated concentrations of NE in these regions associated with emotional processing. Thus, our chemosensor is a robust tool for measuring neurotransmitter dynamics in diverse model organisms.

Dynamics

10.1021/jacs.4c14727

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Radiation effects and radiation hardness solutions for single-walled carbon nanotube-based thin film transistors and logic devices

Carbon (2016)

Yudan Zhao Dongqi Li Lin Xiao Junku Liu Xiaoyang Xiao

Ambipolar diffusion

Radiation hardening

10.1016/j.carbon.2016.07.033

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Citations (24)

Fabrication of air-stable n-type carbon nanotube thin-film transistors on flexible substrates using bilayer dielectrics

Nanoscale (2015)

Guanhong Li Qunqing Li Yuanhao Jin Yudan Zhao Xiaoyang Xiao

A bilayer dielectric structure of MgO and ALD Al₂O₃ or HfO₂ was used for making n-type SWCNT-TFTs at a low temperature of 120 °C.

10.1039/c5nr05036g

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Citations (26)

Molecularly engineered supramolecular fluorescent chemodosimeter for measuring epinephrine dynamics

Nature Communications (2025)

Yudan Zhao Yuxiao Mei Zhichao Liu Jing Sun Yang Tian

Abstract Accurately visualizing epinephrine (EP) activity is essential for understanding its physiological functions and pathological processes in brain. However, to the best of our knowledge, reliable, rapid, and specifical measurement of EP dynamics at cellular and in vivo level hasn’t been previously reported. Herein, we report the probe for EP imaging and biosensing in neurons and living brain of freely behaving animals, based on creating a series of supramolecular fluorescent chemodosimeters through host-guest interaction. The optimized chemodosimeter enables real-time imaging and quantifying of EP with high specificity, sensitivity, signal-to-noise ratio, and rapid kinetics (~240 ms) in neurons, brain tissues and zebrafish. More significantly, we demonstrate real-time monitoring of EP in 26 regions within deep brain of freely behaving male mice, unraveling an augmented EP concentration in the amygdala, thalamus, hypothalamus, hippocampus and striatum under fear-induced stress. These findings highlight our chemodosimeter as a powerful tool for precise measurements of EP dynamics in diverse model organisms.

10.1038/s41467-025-57100-5

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Demonstration of nonvolatile multilevel memory in ambipolar carbon nanotube thin-film transistors

Applied Physics Express (2015)

Guanhong Li Qunqing Li Yuanhao Jin Qingkai Qian Yudan Zhao

Multilevel memories have attracted significant interest because of their larger memory density per unit cell. Here, we investigated multilevel operation with ambipolar carbon nanotube thin-film transistors. Three distinct conduction states and a direct change between any of them were demonstrated by selecting appropriate values for the magnitude and duration of each program/erase voltage pulse. A low operation voltage of 5 V and a short duration of 1 s were obtained by utilizing a bilayer Al2O3-epoxy dielectric to enhance the gate modulation efficiency. A tradeoff exists between low-voltage operation and fast switching for a given device.

Ambipolar diffusion

Non-Volatile Memory

10.7567/apex.8.065101

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Citations (2)