Smile, Smart, Speed

고객의 만족을 위하여 최선을 다하는 기업, 정문사이언스입니다.

분석장비

HomeHOME > 회사소개 >분석장비

이온화에너지 측정 시스템

모델명 : BIP-KV100
  • - Ionization Energy Measurement System
카탈로그 보기 제품 견적문의

상품상세정보

Specifications

Measurement Principle

Photoelectron Yield Spectroscopy (PYS method)

Measurement WL range

9.54 ～ 4.0eV（130 ～ 310nm）

Min. measurement interval

0.01eV

Measurement resolution

10fA ～ 100mA

Sample chamber

Atmosphere, nitrogen, vacuum compatible/VG65,NW25 port for vacuum pump

Irradiation light area

approx. 1×3mm ( by slit and vertical aperture )

WL resolution ( WL width )

0.08eV（4.2nm）　* at 256nm

Sample arrangement

Horizontal , Number of setting sample: 1 pc

Sample size

Max. 60 x 60mm, Min. 10 x 10mm, Thickness : within 4mm

Door switch

For safety of Internal applied voltage electrode and for applied voltage for PMT

Monochromator structure

Nitrogen purge ( light source and high order light cut-filters built in)

WL drive

Stepping motor, sine bar method ( GPIB control )

Focal length

100mm * for monochromator

Aperture ratio

F=3.5 * for monochromator

Mechancial WL range

0 ～ 400nm　* In case of the grating 2400 lines/mm

WL accuracy

±1nm　* Setting from long WL *WL accuracy & repeatability

Tubing introduction

IN2 ( Swagelok 1/4), OUT2 ( Swagelok 3/8 ), Relief valve, Flow meter, Stop valve

PY measuring device

Micro ammeter ( Sub-Femtoamp Remote SourceMeter )

*PY=Photoelectron Yield

Irradiation intensity detector

PMT（ supplied with certified spectral sensitivity data for 130 ~ 310nm )

Software control function

System control, photoelectron measuring function,cal. of ionization energy (work function), DOS

Software save function

Data binary save and redisplay function, save in text

 

■　Background measurement and sample measurement can be continuously performed by the sample slide mechanism. Measurement is possible with the preset atmosphere (atmosphere, nitrogen, vacuum) maintained.

 

■　Ultrahigh sensitivity of 13 digits (10 fA ~ 100 mA) has been achieved with use of PYS method.

 

■　A port mounting a commercially available dry vacuum pump and composite molecular pump is provided

 

■　The optional Measurement Range Extension Unit enables the system to measure from 3.4 eV.

 

 

Measurement Data


Screen of Measurement Conditions

 

 

 

 

Ionization energy measurement data of TiO 2 particles [7.4 eV]

 

 

Measurement Items

① Background measurement:

The light to be irradiated on the sample is measured in advance with a

photomultiplier, and the number of photons is calculated.

②Sample measurement

Monochromatic light at each wavelength is irradiated to the sample while the

voltage is applied to the sample for the electrons to be released easily.

③ Ionization energy data processing

　Y ∝ (hν-I)n

Y= Released numbers of electron measured / numbers of photon irradiated

h Planck's constant

ν Frequency

I Threshold

n depends on density of electrons in the high level edge in the occupied state

of the sample.Only 2 or 3 can be selected in the parameter n.



 

 

Standard configurations

 

●Deuterium lamp 30W, (MgF2 window, natural air cooling )

●Power supply for D2 lamp

●Nitrogen purge type monochromator

●Grating:1200 grooves/mm blazed at 150nm ( MgF2 coating type )

●High order light cut filters and shutter

●Flow meter ( 1 ~ 10L/min)

●Sample chamber (atmosphere, nitrogen atmosphere, and vacuum compatible)

●Sample stage: 62 x 62mm (PTFE, detachable)）

●Sample stage slide mechanism (operated outside of sample chamber, travel distance 65mm )

●Plate electrode up-down mechanism ( travel distance 6mm )）

●Standard sample ( Gold leaf Au)

●PMT for measuring irradiation light intensity and high voltage power supply (applied voltage -300V)

●Minute current measurement device for Photoelectron yield measurement

・Minimum range: 1pA Minimum range resolution: 10aA ( when the range is set at 1pA )

・Max. range : 100mA Max. range resolution: 1.0μA ( when range is set at 100mA )

・Noise level: within 0.4 fAp-p（4×10-16 A noise）

●Controller (GPIB control)

●GPIB-USB cable

●Software ( Windows 10 compatible, English )

●PC for controlling the system Note PC Windows 10 64bit

 

 

 

Option

 

●Measurement range expansion unit ( for 3.4 ~ 7.5eV )

・Grating 2400 grooves/mm blazed at 240nm ( MgF2 coating type )