Nano-enabled Energy Conversion, Storage and Thermal Management Systems (NEXT) Group

University of Colorado at Boulder

 

Director: Dr. Ronggui Yang, Assistant Professor of Mechanical Engineering

Office Location: ECME 136, Engineering Center

Post-Doctor Offices: ECME 251A, ECME 251B

Student Offices and Labs: ECME 165, ECME 219, ECME 1B80

Tel: 303-735-1003 (O),  303-735-1763  (Lab);  Fax: 303-492-3498

 

 

People    Research    Publications    Facilities    Open Positions    News

 

This page is under development.

 

Professor Ronggui Yang’s group controls ~2000 square feet lab space for the Nano-enabled Energy Conversion, Storage and Thermal Management Systems (NEXT) Group. Being affiliated with NSF Extreme Ultraviolet Engineering Research Center (NSF EUV ERC), the DARPA Focus Center for integrated Micro/Nano Integrated Transducers (DARPA iMINT Center), the Colorado Nanotechnology Initiative, and the Colorado Energy Initiative,  Professor Yang’s group has access to many state-of-the-art nanoscale characterization and fabrication facilities and lasers and optics facilities. In addition, a range of electrical and optical measurement systems have been developed in NUTS lab for the measurement of thermal, thermoelectric and electrical properties of both bulk and nanostructured materials from low temperature to high temperature including the conventional four-probe measurement systems, 3-omega system for thermal measurement of nanostructures, the transient hot wire measurement system, and the very complicated two color and EUV femtosecond optical pump-and-probe systems. The key building blocks in NUTS lab are listed below:   

 

Optical Measurement Systems

·        A femtosecond Two-Color Optical Pump-and-Probe System with the following key components:

  • the 10W diode-pumped all solid state Nd:YV04 pump laser (Spectra-Physics),
  • the 100fs ultrafast mode-locked Ti:Sapphire laser oscillator (Spectra-Physics),
  • Second harmonic generation,
  • 60cm-long travel linear stage system with motion control (Newport),
  • Acoustic-Optical Modulator & Driver (Quanta-Tech)

 

·        A femtosecond EUV Pump-and-Probe System configured for two-dimensional nanoscale thermal imaging and three-dimensional nanostructure characterization

 

·        Stabilized frequency HeNe laser and many diode lasers (Spectra-Physics)

 

·        Laser Beam Diagnostics including scanning autocorrelator, laser spectrum analyzer, power meter, IR viewer, and laser beam profilimeter (Newport)

 

General Data Acquisition and Analysis Electronics (multiple units of the following):

·         DSO6052A - 2-channel, 500 MHz Oscilloscope (Agilent)

·         33250A - 80 MHz Function/Arbitrary Waveform Generator (Agilent)

·         34401A - Digital multimeter, 6.5 digit (Agilent)

·         34420A Nanovolt/micro-ohm meter, 7.5 digit (Agilent)

·         34980A Multifunction Switch (Agilent)

·         Power supplies (Agilent)

·        SR830 dual-phase lock-in amplifier (Stanford Research Systems)

·        SR840 200MHz lock-in amplifier (Stanford Research Systems)

·        2400 Digital Sourcemeter (Keithley)

·        2420 3A Digital Sourcemeter (Keithley)

·        2000 Digital Multimeter (Keithley)

 

Cryogenics and Vacuum Systems:

·        Continuous Flow Dewar

·        ST-100 Continuous Flow Optical Cryostat (Janis Research Co.)

·        Model TP-70-2 Turbopump Station (Janis Research Co.)

·        Lakeshore Model 331S Temperature Controller (Lakeshore)

·        HAAKE Phoenix II P2-C50P Refrigerated Circulator (Thermo Electron)

 

Furnaces:

 

 

Computer Systems:

·        IBM T42p Laptop

·        Dell XPS 400 3GHz Dual Core Workstations -- 12

·        Computer Cluster: http://nanoec.mit.edu (managed by Professor Gang Chen at MIT)

                        24 nodes: Dual Xeon EM64T 3.0GHz, 4GB RAM

                        Head node: Dual Xeon EM64T 3.6GHz, 8GB RAM