Lulu Ren

ORCID: 0000-0002-8308-2907
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About
Contact & Profiles
Research Areas
  • Advanced Sensor and Energy Harvesting Materials
  • Dielectric materials and actuators
  • Ferroelectric and Piezoelectric Materials
  • Dielectric properties of ceramics
  • Graphene and Nanomaterials Applications
  • High voltage insulation and dielectric phenomena
  • Graphene research and applications
  • Crystallization and Solubility Studies
  • X-ray Diffraction in Crystallography
  • Advanced Battery Materials and Technologies
  • Microwave Dielectric Ceramics Synthesis
  • Advancements in Battery Materials
  • Advanced Battery Technologies Research
  • Nanoparticle-Based Drug Delivery
  • Electromagnetic wave absorption materials
  • RNA Interference and Gene Delivery
  • Nanoplatforms for cancer theranostics
  • ZnO doping and properties
  • Electrospun Nanofibers in Biomedical Applications
  • Polymer Nanocomposite Synthesis and Irradiation
  • Multiferroics and related materials
  • biodegradable polymer synthesis and properties
  • Membrane Separation Technologies
  • Nanomaterials for catalytic reactions
  • Supercapacitor Materials and Fabrication

Washington State University
2024-2025

Guizhou Institute of Technology
2023-2024

Sir Run Run Shaw Hospital
2018-2023

Zhejiang University
2018-2023

University of California, Irvine
2022-2023

Hebei University of Engineering
2023

Chongqing University
2015-2022

National Engineering Research Center for Compounding and Modification of Polymer Materials
2022

China Automotive Technology and Research Center
2022

Pennsylvania State University
2019-2021

Abstract Modern electronics and electrical systems demand efficient operation of dielectric polymer‐based capacitors at high electric fields elevated temperatures. Here, polyimide (PI) composites prepared from in situ polymerization the presence inorganic nanofillers are reported. The systematic manipulation constant bandgap fillers, including Al 2 O 3 , HfO TiO boron nitride nanosheets, reveals dominant role fillers determining improving high‐temperature capacitive performance polymer...

10.1002/aenm.201903881 article EN Advanced Energy Materials 2020-03-04

Next-generation microelectronics and electrical power systems call for high-energy-density dielectric polymeric materials that can operate efficiently under elevated temperatures. However, the currently available polymer dielectrics are limited to relatively low working Here, solution-processable nanocomposites consisting of readily prepared Al2 O3 fillers with systematically varied morphologies including nanoparticles, nanowires, nanoplates reported. The field-dependent conduction at...

10.1002/adma.201900875 article EN publisher-specific-oa Advanced Materials 2019-04-12

Graphene oxide (GO) sheets, considered as "soft" two-dimensional macromolecules containing multiple aromatic regions and hydrophilic oxygen groups, can adsorb the pristine multiwalled carbon nanotubes (MWNTs) through π-stacking interaction, thus causing MWNTs to stably disperse fractionate in aqueous media. The water-soluble insoluble complexes be obtained by changing initial proportion of GO which are important for noncovalent approaches toward solubilizing CNTs open a new way applications...

10.1021/jp103745g article EN The Journal of Physical Chemistry C 2010-06-15

Superior high-temperature discharged energy densities in comparison to those of the current dielectric polymers have been demonstrated crosslinked fluoropolymers.

10.1039/c9ee03603b article EN Energy & Environmental Science 2020-01-01

Abstract High‐energy‐density polymer dielectrics capable of high temperature operation are highly demanded in advanced electronics and power systems. Here, the polyetherimide (PEI) composites filled with core–shell structured nanoparticles composed ZrO 2 core Al O 3 shell described. The establishment a gradient dielectric constants from to PEI matrix gives rise much less distortion electric field around nanoparticles, consequently, breakdown strength at varied temperatures. wide bandgap...

10.1002/aenm.202101297 article EN Advanced Energy Materials 2021-06-09

Abstract The exploration of high‐energy‐density electrostatic capacitors capable operating both efficiently and reliably at elevated temperatures is great significance in order to meet advanced power electronic applications. energy density a capacitor strongly dependent on dielectric constant breakdown strength material. Here, we demonstrate class solution‐processable polymer nanocomposites exhibiting concurrent improvement strength, which typically show negative correlation conventional...

10.1002/inf2.12043 article EN cc-by InfoMat 2019-10-02

Functionalized graphene sheets (FGS)/ZnO nanocomposites were fabricated via thermal treatment method, using oxide as a precursor of graphene, Zn(NH3)4CO3 zinc oxide, and poly(vinyl pyrrolidone) an intermediate to combine with carbon materials. Thermogravimetric analysis, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, transmission electron microscopy (TEM), scanning (SEM) used characterize crystal structure morphology FGS/ZnO nanocomposites. It was shown that the...

10.1021/am200561k article EN ACS Applied Materials & Interfaces 2011-06-18

Abstract Drug resistance, accounting for therapeutic failure in the clinic, remains a major challenge to effectively manage cancer. Cyclosporin A (CsA) can reverse multidrug resistance (MDR), especially epidermal growth factor receptor tyrosine kinase inhibitors. However, application of both drugs cancer therapies is hampered by their poor aqueous solubility and low bioavailability due oral administration. CsA augments potency gefitinib (Gef) Gef-sensitive Gef-resistant cell lines. Here, we...

10.1038/s41392-018-0019-4 article EN cc-by Signal Transduction and Targeted Therapy 2018-06-20

Hexagonal boron nitride nanosheets (BNNSs) are two-dimensional nanomaterials with graphitic-like layered nanostructures, high surface areas, and large aspect ratios. Owing to their excellent thermal conductivity, electrical mechanical strengths, BNNSs emerging as multifunctional fillers in polymer dielectrics. In this article, the authors review recent progress BN-containing nanocomposites designed for high-performance film capacitors. While general synthetic approaches polymer/BNNS...

10.1049/hve.2020.0076 article EN cc-by High Voltage 2020-04-28

A series of eight derivatives based on tetraphenylethylene were prepared, and two these, i.e., 1,1-bis(4-phenylcarbonyl)-2,2-diphenylethylene (2), 1,1,2,2-tetrakis(4-phenylcarbonyl)phenylethylene (4), characterized crystallographically. Because the rigidity steric hindrance in molecular structure enhanced regularly from sample 5 to 8, UV-visible absorption PL spectra 5-8 show transition aggregation-induced emission (AIE) enhancement (AIEE) behavior. Solid fluorescence lifetime...

10.1021/jp911311j article EN The Journal of Physical Chemistry B 2010-04-21

Fundamentally suppressing Li dendrite growth is known to be critical for realizing the potential high energy density Li-metal batteries (LMBs). Inspired by ionic transport function of proteins, we previously discovered that utilizing natural proteins was able stabilize anode but have not demonstrated how a specific amino acid protein enabled function. In this study, decorate separator with Leucine (Leu) assisted poly(acrylic acid) (PAA) effectively stabilizing anode, so as dramatically...

10.1021/acsami.4c01256 article EN ACS Applied Materials & Interfaces 2024-03-15

The development of advanced dielectric materials with high breakdown strength, dischargeable energy densities, and great efficiencies is imperative to meet the ever-increasing demand modern power systems electronic devices. Herein, we present layer-by-layer solution prepared bilayer-structured nanocomposite films much enhanced capacitive performance via resolving typical paradox between constant strength in materials. bilayered are composed Al2O3 dispersed polystyrene as interfacial barrier...

10.1021/acsaem.0c01508 article EN ACS Applied Energy Materials 2020-08-06

Advancement of sulfur (S) cathode lithium-sulfur (Li-S) batteries is hindered by issues such as insulating nature sulfur, sluggish redox kinetics, polysulfide dissolution and shuttling. To address these issues, we initiate a study on applying an important amino acid protein, arginine (Arg), functional additive into S cathodes. Based our simulation study, the positively charged Arg facilitates strong interactions with polysulfides. The experimental results indicate that interaction enable...

10.1002/cssc.202402284 article EN ChemSusChem 2025-01-03

We report that the graphene sheets can be stably dispersed in water by hydrophobic interaction with polyacrylamide. Most interestingly, resultant graphene–polyacrylamide complexes show a reversible pH responsive property although polyacrylamide itself does not possess such characteristics. This method opens up novel opportunities for potential applications of intelligent sensors, biology, medicine, nanoelectronics and other relevant areas.

10.1088/0957-4484/21/33/335701 article EN Nanotechnology 2010-07-26
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