Cheng Lab: Facilities
Sputtering deposition of thin films
The AJA sputtering deposition system, funded by an National Science Foundation Major Research Instrument grant, can grow thin films with the thickness controlled to a few atomic layers.
Karl Suss MJB 3 Mask Aligner
Yilun Tang '17 and Zhuyun Xiao '15 perform photolithography. Zhuyun presented her research on patterned magnetic disks at the American Physical Society March Meeting.
The Cheng group work at Argonne National Laboratory
Zhongying Yan '18 investigates the growth of hollow gold spheres with an Argonne scientist and Bryn Mawr graduate students.
Laboratory and fabrication equipment:
The Cheng Lab has a 925-square-foot laboratory space divided into three rooms provided by Bryn Mawr College.
The two adjacent bigger rooms are designed for miro- and nanofabrication use, suitable for photolithography and film deposition:
- a 100-square-foot class 1000 soft curtain cleanroom with purify water system and the ceiling lighting suitable for photolithography
- AJA ATC Orion 5-source Sputtering Deposition System
- Karl Suss MJB 3 Mask Aligner
- Filmetrics thin film measurement system
- three chemical hoods with in-house vacuum, compressed air and gas lines
- the ultrasound cleaner and programmable hotplate for photolithography procedure
- TMC vibration isolated optical table
- ETS humidity control chamber
- Princeton Applied Research potentiostat (VersaSTAT-200) for template electrochemical deposition
The third room provides a quiet space for computer simulation and data analysis.
- Two workstations with the Mumax and OOMMF software packages, Mathematica and MatLab software installed for micromagnetic simulation is located in the computer room.
- Several networked computers with appropriate instrument control and data analysis software are available in the nanofabricaiton rooms.
The Cheng group shares or has free access to the following on-campus major instruments:
- PMS MicroMagTM3900 VSM magnetometer
- Agilent 5500 scanning probe microscope with atomic force microscopy and scanning tunneling microscopy capabilities
- Rigaku Ultima IV X-ray diffraction (XRD)
The Cheng group has free access through general user proposals to the following DOE user facilities:
- X-ray magnet circular dichroism spectroscopy and x-ray PEEM imaging at the Advanced Light Source of Lawrence Berkeley National Laboratory
- X-ray magnet circular dichroism spectroscopy at the Advanced Photon Source of Argonne National Laboratory