Spectrum adapted expectation-maximization algorithm for high-throughput peak shift analysis
- Resource Type
- article
- Authors
- Tarojiro Matsumura; Naoka Nagamura; Shotaro Akaho; Kenji Nagata; Yasunobu Ando
- Source
- Science and Technology of Advanced Materials, Vol 20, Iss 1, Pp 733-745 (2019)
- Subject
- em algorithm
peak separation
spectral data
xps analysis
machine learning
Materials of engineering and construction. Mechanics of materials
TA401-492
Biotechnology
TP248.13-248.65
- Language
- English
- ISSN
- 1468-6996
1878-5514
14686996
We introduce a spectrum-adapted expectation-maximization (EM) algorithm for high-throughput analysis of a large number of spectral datasets by considering the weight of the intensity corresponding to the measurement energy steps. Proposed method was applied to synthetic data in order to evaluate the performance of the analysis accuracy and calculation time. Moreover, the proposed method was performed to the spectral data collected from graphene and MoS2 field-effect transistors devices. The calculation completed in less than 13.4 s per set and successfully detected systematic peak shifts of the C 1s in graphene and S 2p in MoS2 peaks. This result suggests that the proposed method can support the investigation of peak shift with two advantages: (1) a large amount of data can be processed at high speed; and (2) stable and automatic calculation can be easily performed.