Endstation

Catalysis and Surface Science Endstation

1. Endstation facilities

Analysis chamber：VG SCIENTA R4000 electron analyzer，Monochromatic X-ray source (Al Ka), LEED optics, Variable temperature five freedom manipulator (X,Y,Z,q, j, temperature range: 90-1500 K), flood gun. Base pressure: < 7´10-11 mbar.

Preparation chamber：Four freedom manipulator (X,Y,Z,q) on which sample temperature can be varied from 90-1500 K, ion sputter gun, metal evaporators, quartz crystal microbalance (QCM). Base pressure: <1´10-10 mbar.

MBE chamber：Two freedom manipulator (Z,q) with sample temperature range of 90-1500 K, QCM. Base pressure: <1´10-10 mbar.

UHV Transfer Suitcase: It does not require a UPS power supply and can maintain a vacuum degree of 5×10-10 mbar for a long time with a NEXTorr D200-5 adsorption pump.

Glovebox: Leakage rate < 0.001 vol%h，H2O < 1 ppm，O2 < 1 ppm

2. Properties of the endstation

Base pressure: 7×10-11 mbar of Analysis chamber, 1´10-10 mbar of Preparation chamber, 1´10-10 mbar of MBE chamber

Temperature: 90 K~1500 K

In situ conditions: Deposition of various metals and organic molecules in situ, and adjust the temperature of the samples in situ.

3. Experimental method

NEXAFS (Near-Edge X-ray Absorption Fine Structure)

SRPES (Synchrotron Radiation Photoelectron Spectroscopy)

SRUPS (Synchrotron Radiation Ultraviolet Photoelectron Spectroscopy)

HR-XPS (High-resolution X-ray photoelectron spectroscopy)

LEED (Low Energy Electron Diffraction)

TPD (Temperature Programmed Desorption)

4. Sample Requirements

1) stable, no decomposition and volatility

2) non-radioactive, non-highly toxic and non-strongly magnetic

3) fully dried

4) as fine as possible for the powder samples

5) should be smooth for thin sheet block samples