Kexuan Li

ORCID: 0000-0003-4953-3054
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Research Areas
  • Liquid Crystal Research Advancements
  • Advanced Fiber Laser Technologies
  • Photonic Crystal and Fiber Optics
  • Photonic Crystals and Applications
  • Photochromic and Fluorescence Chemistry
  • Advanced Fiber Optic Sensors
  • Intermetallics and Advanced Alloy Properties
  • Advanced Materials and Mechanics
  • Laser-Matter Interactions and Applications
  • Photonic and Optical Devices
  • Structural Behavior of Reinforced Concrete
  • Molecular spectroscopy and chirality
  • Innovative concrete reinforcement materials
  • MXene and MAX Phase Materials
  • Surfactants and Colloidal Systems
  • Aluminum Alloys Composites Properties
  • Optical Polarization and Ellipsometry
  • Advanced oxidation water treatment
  • Plant Reproductive Biology
  • Nonlinear Optical Materials Studies
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Supercapacitor Materials and Fabrication
  • Metamaterials and Metasurfaces Applications
  • Advanced machining processes and optimization
  • Plant Stress Responses and Tolerance

Xijing University
2016-2025

Southwest Jiaotong University
2025

Ningbo No. 2 Hospital
2025

Harbin Institute of Technology
2022-2024

University of Shanghai for Science and Technology
2023-2024

Hefei University of Technology
2023-2024

Hunan University
2024

Yantai University
2024

Sichuan Normal University
2024

State Key Laboratory of Hydraulics and Mountain River Engineering
2022-2023

Abstract Time‐dependent dynamic information encryption technology is a promising approach to enhancing the security and complexity of transmission. Herein, time‐dependent model from liquid crystalline polymer (LCP) film with programmable glass transition temperature ( T g ) gradually adjustable fluorescence demonstrated. The achieved by adjusting degree order LC molecules via configuration interconversion spiropyran‐based materials (SPBMs), which can convert between V‐shaped colorless spiro...

10.1002/adfm.202400030 article EN Advanced Functional Materials 2024-03-04

We demonstrated a high-repetition-rate Q-switched fiber laser with topological insulator Bi₂Se₃ absorber. The absorber was made into film structure by spin-coating method using few-layer nano-platelets which had regular shape. uniform low saturable optical intensity of 11 MW/cm(2), is the lowest in absorbers till now. By inserting an Erbium-doped laser, high-repetition repetition rates from 459 kHz to 940 achieved. maximum output power 22.35 mW shortest pulse duration 1.9 μs. To best our...

10.1364/oe.22.011508 article EN cc-by Optics Express 2014-05-05

A composite film with multiple anti-counterfeiting features was demonstrated by superposing quantum dots (QDs) polymer matrix (film A) and cholesteric liquid crystal B) together. The first-line second-line characteristics were successfully implemented employing thermochromic, angular photochromic, circularly polarized discoloration of B, respectively. By initiatively utilizing the different relative positions between fluorescence emission peak (λem) central selective reflection wavelength...

10.1021/acsami.0c18132 article EN ACS Applied Materials & Interfaces 2021-01-05

A novel method for highly selective recognition of UO22+ is proposed based on a [Eu(pyridine-2,5-dicarboxylic acid N-oxide)] (Eu-PDA) metal-organic framework. Benefiting from the unique chemical structure Eu-PDA, energy transfer PDA to was enabled, resulting in up-regulated fluorescence UO22+. The Eu-PDA probe showed excellent specificity over numerous interfering species, as intrinsic emissions were triggered.

10.1039/d4cc06538g article EN Chemical Communications 2025-01-01

10.1016/j.ijmachtools.2016.03.002 article EN International Journal of Machine Tools and Manufacture 2016-03-09

Abstract Liquid‐crystalline polymers have been applied to a wide variety of stimuli‐responsive materials; however, the inevitable mesogenic alignment or extra complicated preparation hinders their further application and large‐scale fabrication. Here, fabrication free‐standing blue phase liquid‐crystalline (BPLC) film is reported by using one well‐designed system composed specially designed hydrogen‐bonded precursors, which can spontaneously self‐assemble into 3D nanostructures without...

10.1002/adfm.202004610 article EN Advanced Functional Materials 2020-09-06

Abstract Fabricating functional materials via molecular self-assembly is a promising approach, and precisely controlling the building blocks of nanostructures in process an essential challenging task. Blue phase liquid crystals are fascinating self-assembled three-dimensional nanomaterials because their potential information displays tuneable photonic applications. However, one main obstacles to applications narrow temperature range few degrees centigrade, although many prior studies have...

10.1038/s41467-021-21564-y article EN cc-by Nature Communications 2021-03-04

NiS/NiO nanoparticles are successfully fabricated through a simple dealloying method and an ion-exchange process. X-ray diffraction demonstrates the existence of NiO NiS phases, scanning electron microscopy transmission imply nanopore distribution nature nanoparticle morphology produced material. The electrochemical behaviors studied by cyclic voltammetry galvanostatic charge–discharge measurements. electrode shows enhanced specific capacitance 1260 F g–1 at current density 0.5 A g–1....

10.1021/acsomega.1c01717 article EN cc-by-nc-nd ACS Omega 2021-07-08

The particles of photopolymerizable monomer/chiral dopant composites with a crystalline (Cr)-chiral nematic (N*) phase transition were prepared. By mixing the different pitches N* together Cr and making liquid crystal (LC) monomer molecules cross-linked by photopolymerization in planarly oriented phase, chiral (N*-LC) gel film nonuniform pitch distribution was obtained. bandwidth reflection spectrum location band can be controlled accurately controlling lengths particles.

10.1063/1.2812539 article EN Applied Physics Letters 2007-11-12

We demonstrated an all-normal-dispersion Yb-doped mode-locked fiber laser based on tungsten disulphide (WS2). The saturable absorbers (SA) were made by mixing WS2 solution with polyvinyl alcohol (PVA), and then evaporated a substrate. modulation depth of the film was 2.06% optical intensity 71.6 MW cm−2. When inserted into laser, pulses pulse width 2.5 ns repetition rate 2.84 MHz obtained. As pump power increased to 350 mW, maximum output measured be 8.02 mW. To best our knowledge, this is...

10.1088/1612-2011/12/12/125102 article EN Laser Physics Letters 2015-11-18

We demonstrate a femtosecond erbium-doped fibre laser operating in the long wavelength band (L-band) which topological insulator Bi2Se3-polyvinyl alcohol film is applied as saturable absorber. It generates ~360 fs soliton pulse at 1600 nm with repetition rate of 35.45 MHz. To best our knowledge, this shortest duration ever achieved an L-band design employing Bi2Se3 The result shows could be promising candidate to generate ultrafast pulses for practical applications.

10.1088/1612-2011/12/10/105103 article EN Laser Physics Letters 2015-09-24
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