Fengnan Chen

ORCID: 0000-0002-0999-6356
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About
Contact & Profiles
Research Areas
  • Mechanical and Optical Resonators
  • Advanced MEMS and NEMS Technologies
  • Environmental Impact and Sustainability
  • Force Microscopy Techniques and Applications
  • Recycled Aggregate Concrete Performance
  • Power Systems and Renewable Energy
  • Concrete and Cement Materials Research
  • Photonic and Optical Devices
  • Integrated Energy Systems Optimization
  • Nanofabrication and Lithography Techniques
  • Photovoltaic Systems and Sustainability
  • Energy, Environment, Economic Growth
  • Climate Change Policy and Economics
  • Acoustic Wave Resonator Technologies
  • Military Defense Systems Analysis
  • Muscle activation and electromyography studies
  • Conducting polymers and applications
  • Robotics and Sensor-Based Localization
  • Analytical Chemistry and Sensors
  • Solar-Powered Water Purification Methods
  • Molecular Communication and Nanonetworks
  • Innovations in Concrete and Construction Materials
  • Regional Development and Environment
  • Advanced Vision and Imaging
  • Nanotechnology research and applications

State Grid Corporation of China (China)
2024

Soochow University
2018-2024

Beihang University
2024

Wenzhou University
2023

Northwestern Polytechnical University
2023

Northwest A&F University
2021

State Power Investment Corporation (China)
2017

University of Chinese Academy of Sciences
2011-2015

Institute of Geographic Sciences and Natural Resources Research
2011-2015

Chinese Academy of Sciences
2011-2014

Electron beam lithography uses an accelerated electron to fabricate patterning on electron-beam-sensitive resist but requires complex dry etching or lift-off processes transfer the pattern substrate film substrate. In this study, etching-free is developed directly write a of various materials in all-water processes, achieving desired semiconductor nanopatterns silicon wafer. Introduced sugars are copolymerized with metal ions-coordinated polyethylenimine under action beams. The process and...

10.1021/acsnano.2c12387 article EN ACS Nano 2023-02-20

10.1016/j.sna.2023.114891 article EN Sensors and Actuators A Physical 2023-12-04

Mechanical resonators based on monolayer molybdenum disulfide, a two-dimensional semiconductor, offer the possibility of harnessing light-matter interaction to develop sensitive detection schemes. These schemes consist in measuring fluctuations mechanical response resonator, such as its displacement spectrum, induced by minute changes environment. The accuracy detecting depends how accurately temperature vibrations is known. However, using light measure modifies vibrational temperature,...

10.1088/2053-1583/aae5b7 article EN 2D Materials 2018-10-02

Software-defined radio dongles are small and inexpensive receivers well known to amateur enthusiasts. When connected an antenna, they enable monitoring of a wide range the spectrum by conditioning input signal transferring downconverted version it personal computer for software processing. Here, we employ composite two such dongles, interfaced with codes written in MATLAB GNU Radio, as measuring instrument study flexural vibrations few-layer graphene nanomechanical resonator. Instead connect...

10.1109/access.2022.3188391 article EN cc-by IEEE Access 2022-01-01

<title>Abstract</title> Nanomechanical resonators driven by modulated signals combine the physics of mesoscopic vibrational states and technologies radio communication. Their simplest property stems from their resonant response: they behave as filters, only responding to driving whose frequency components lie well within mechanical bandwidth. This entails that narrowband may be processed a resonator without incurring some distortion. Here, we demonstrate graphene nanomechanical can employed...

10.21203/rs.3.rs-4354743/v1 preprint EN cc-by Research Square (Research Square) 2024-05-29

Abstract Evaporation power generators (EPGs) based on natural water evaporation can directly convert heat energy from the surrounding environment into electrical energy. However, EPGs are difficult to commercialize due low charge generation and transport efficiency of single material systems, resulting in unsatisfactory open-circuit voltages short-circuit currents. Here, we step by prepared MoS2/porous carbon nanofiber (PCNF) heterogeneous systems electrospinning hydrothermal methods....

10.1088/1361-6528/ad8bca article EN Nanotechnology 2024-10-28

Free-standing graphene membranes are the archetypes of two-dimensional nanomechanical resonators. Because their small size, ultra-low mass, and high elastic modulus, these resonators typically vibrate at frequencies ranging from a few megahertz to hundreds megahertz, resonant can be widely tuned by electrical means. However, because fabrication subtleties, it has been found that actual mode shapes vary greatly device device. To address it, here we simulate drum with COMSOL Multiphysics...

10.1117/12.2688193 article EN 2023-11-06

Two-dimensional (2-D) nanomechanical resonators are interesting for the tunability of their resonant frequencies over wide frequency ranges using electrical means. These often made by transferring thin membranes layered materials onto cavities fabricated in oxidized silicon wafers. The vibrational modes is tuned applying a dc voltage between membrane and substrate acting as global gate, which creates an electrostatic force that pulls towards gate changes strain within membrane. Here, we...

10.1117/12.2642575 article EN 2023-01-23

Two-dimensional (2-D) nanomechanical resonators are based on thin layers of graphene, black phosphorus, transition metal dichalcogenides and van der Waals heterostructures. Detection vibrations can be done using optical reflectometry, whereby modulate the reflectance resonator. For this type detection to work, it is essential fabricate cavities with a precise depth. Here we report fabrication 2-D in which cavity made focused ion beam (FIB) lithography. We mill down an array cylindrical same...

10.1117/12.2642576 article EN 2023-01-23
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