CEIIS
Script error: No such module "Draft topics".
Script error: No such module "AfC topic".
Contact electrification induced interface spectroscopy (CEIIS) is a general field of spectroscopy corresponding to electronic transitions at the interface from an atom in one material to another atom in the other material during contact electrification (or triboelectrification). During this process, the photon emission, Auger electron excitation, x-ray emission, and electron emission etc. at an interface are expected to be observed and could further reveal the information about interfaces, which might impact our understanding of the interaction between solids, liquids, and gases. This concept is firstly predicted by Wang et al.[1][2] And it is further proved by the observation of atomic featured photon emission spectra during contact electrification (CE) between two solids.[3] This photon emission is different from air discharge spectra and fluorescence spectra of materials. And it provides the evidence that electron transfer takes place at the interface from an atom in one material to another atom in the other material during CE. The process regarding to photon emission is the contact electrification induced interface photon emission spectroscopy (CEIIPES). CEIIPES occurs through energy resonance transfer when atoms from different materials are brought close with each other.
Nomenclature[edit]
CEIIS is short for Contact Electrification Induced Interface Spectroscopy. It is a general field of spectroscopy corresponding to electronic transitions at the interface from an atom in one material to another atom in the other material during contact electrification (or triboelectrification)., so that it is named as “CEIIS” by Wang et al.
Experimental evidence[edit]
CEIIS was verified experimentally by atomic featured photon emission spectra during contact electrification between two solids. This photon emission is different from air discharge spectra and fluorescence spectra of materials. It was found that several sharp lines were observed with atomic spectra feature such as discrete distribution in the spectrum and very narrow (<1 nm) full width at half maximum (FWHM) as in Fig. 1A. According to their peak positions at 434.0, 486.0 (inset of Fig. 1A), and 656.2 nm to the electron transitions in hydrogen (H) atom (red) and those at 777.5 and 844.7 nm to the electron transitions in oxygen (O) atom (magenta) for CE of the FEP-acrylic group at pressure around 24 Pa. Other CEIIPES from CE of the FEP-acrylic group could also be observed at different atmosphere pressures, from the deep ultraviolet to near infrared.[4] These atomic featured photon emission lines induced by CE are not only observed in FEP-acrylic group, FEP-quartz group, and polytetrafluoroethylene-quartz (PTFE-quartz) group, but also exist in other groups, such as nylon-FEP-quartz group and Cu foil-FEP-quartz group. Considering the energy levels corresponding to photon emission, when two atoms, on different materials during CE, are close to each other at the repulsive force region, which means that the two have a strong electron cloud overlap, electrons might transfer between these atoms through energy resonance transfer process if their energy levels are so close to each other.
Fig. 1. Interface electron transition induced photo emission spectra and related energy levels in CE at low pressure for the FEP-acrylic group. (A) The spectra recorded at 24 Pa with identified hydrogen and oxygen atomic spectra. a.u., arbitrary units. (B and C) For hydrogen spectra, higher-resolution grating was used for further confirmation. (D) Electron energy radius on Bohr model of hydrogen atom. (E and F) Energy levels for identified atomic lines in (A).
Physical processes of CEIIPES[edit]
Three possible physical processes are suggested for understanding the photon emission arising from the electron charge transferred in CE: CE induced electron to transit (i) to a lower energy level in one atom by emitting a photon; (ii) to the excited state of another atom through energy resonance transfer, followed by transiting to a lower energy level of the atom; and (iii) to a lower energy level in another atom, followed by transiting to an even lower energy level by a photon.
Fig. 2. Energy diagram for interface electron transition induced photo emission. (A) The schematic diagram of FEP and quartz interface at atomic level. (B) Energy diagram of electron transition between hydrogen and fluorine. (C) Energy diagram of electron transition between oxygen and fluorine. (D) Energy diagram of electron transition between hydrogen and oxygen. In addition, the schematic diagram of possible physical processes of electrons transitions and the associated photon emission, also known as Wang transition,[2] when two atoms are close to each other (E to H).
References[edit]
- ↑ Wang, Zhong Lin; Wang, Aurelia Chi (2019-11-01). "On the origin of contact-electrification". Materials Today. 30: 34–51. doi:10.1016/j.mattod.2019.05.016. ISSN 1369-7021. Unknown parameter
|s2cid=ignored (help) - ↑ 2.0 2.1 Wang, Zhong Lin (2020). "Triboelectric Nanogenerator (TENG)—Sparking an Energy and Sensor Revolution". Advanced Energy Materials. 10 (17): 2000137. doi:10.1002/aenm.202000137. ISSN 1614-6840. Unknown parameter
|s2cid=ignored (help) - ↑
This article incorporates text from a publication now in the public domain: Li, Ding; Xu, Cheng; Liao, Yanjun; Cai, Wenzhe; Zhu, Yongqiao; Wang, Zhong Lin (2021). "Interface inter-atomic electron-transition induced photon emission in contact-electrification" (PDF). Science Advances. 7 (39): eabj0349. Bibcode:2021SciA....7J.349L. doi:10.1126/sciadv.abj0349. PMC 8462885 Check |pmc=value (help). PMID 34559569 Check|pmid=value (help). Unknown parameter|s2cid=ignored (help) - ↑ Li, Ding; Xu, Cheng; Liao, Yanjun; Cai, Wenzhe; Zhu, Yongqiao; Wang, Zhong Lin (2021). "Interface inter-atomic electron-transition induced photon emission in contact-electrification" (PDF). Science Advances. 7 (39): eabj0349. Bibcode:2021SciA....7J.349L. doi:10.1126/sciadv.abj0349. PMC 8462885 Check
|pmc=value (help). PMID 34559569 Check|pmid=value (help). Unknown parameter|s2cid=ignored (help)
This article "CEIIS" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:CEIIS. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.
