scholarly journals Effect of the sample work function on alkali metal dosing induced electronic structure change

2021 ◽  
pp. 147045
Author(s):  
Saegyeol Jung ◽  
Yukiaki Ishida ◽  
Minsoo Kim ◽  
Masamichi Nakajima ◽  
Shigeyuki Ishida ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Alkali Metal ◽  
Work Function ◽  
Structure Change

Alkali-Metal Containing Amorphous Carbon: Reactivity and Electronic Structure

1999 ◽  
Vol 593 ◽  
Author(s):  
M. Töwe ◽  
P. Reinke ◽  
P. Oelhafen
Keyword(s):  
Electronic Structure ◽  
Alkali Metal ◽  
Work Function ◽  
Photoelectron Spectroscopy ◽  
Alkali Metals ◽  
Film Surface ◽  
Carbon Films ◽  
Metal Atoms ◽  
Sample Characterization

ABSTRACTAmorphous hydrogen-free carbon films (sp2-dominated a-C) were deposited under ultrahigh vacuum conditions between room temperature and 800°C. These films served as matrices for the in-situ incorporation of alkali-metal atoms (Li, Na). In-situ sample characterization was performed by photoelectron spectroscopy with both x-ray and ultraviolet excitation (XPS, UPS). While the clean metal-containing samples were prepared with metal contents of about 10 at%, a strong oxidation driven accumulation of metal atoms on the film surface exceeding 50 at% was observed upon exposure to molecular oxygen. Work-function measurements by UPS reflected the changes within the electronic structure of the material. Metal incorporation considerably decreased the work-function, but only after oxidation we observed work-functions below the values given for pure alkali metals.

Electronic structure of alkali metal chalcogenides

2015 ◽  
Vol 38 (0) ◽  
pp. 70-81
Author(s):  
Д. И. Блецкан ◽  
В. В. Вакульчак ◽  
А. В. Лукач
Keyword(s):  
Electronic Structure ◽  
Alkali Metal ◽  
Metal Chalcogenides

scholarly journals Alkali metal doping of black phosphorus monolayer for ultrasensitive capture and detection of nitrogen dioxide

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Azam Marjani ◽  
Mehdi Ghambarian ◽  
Mohammad Ghashghaee
Keyword(s):  
Alkali Metal ◽  
Nitrogen Dioxide ◽  
Work Function ◽  
Black Phosphorus ◽  
Research Interest ◽  
Metal Doping ◽  
Li Doping ◽  
Rational Development ◽  
Parallel Configuration ◽  
First Time

AbstractBlack phosphorus nanostructures have recently sparked substantial research interest for the rational development of novel chemosensors and nanodevices. For the first time, the influence of alkali metal doping of black phosphorus monolayer (BP) on its capabilities for nitrogen dioxide (NO2) capture and monitoring is discussed. Four different nanostructures including BP, Li-BP, Na-BP, and K-BP were evaluated; it was found that the adsorption configuration on Li-BP was different from others such that the NO2 molecule preferred a vertical stabilization rather than a parallel configuration with respect to the surface. The efficiency for the detection increased in the sequence of Na-BP < BP < K-BP < Li-BP, with the most significant improvement of + 95.2% in the case of Li doping. The Na-BP demonstrated the most compelling capacity (54 times higher than BP) for NO2 capture and catalysis (− 24.36 kcal/mol at HSE06/TZVP). Furthermore, the K-doped device was appropriate for both nitrogen dioxide adsorption and sensing while also providing the highest work function sensitivity (55.4%), which was much higher than that of BP (10.4%).

Electronic structure of hydrogen- and alkali-metal-vacancy complexes in silicon

1984 ◽  
Vol 29 (4) ◽  
pp. 1819-1823 ◽  
Author(s):  
Gary G. DeLeo ◽  
W. Beall Fowler ◽  
George D. Watkins
Keyword(s):  
Electronic Structure ◽  
Alkali Metal ◽  
Metal Vacancy

Electronic structure and work function of metal gate Mo–W system

2007 ◽  
Vol 91 (9) ◽  
pp. 092106 ◽  
Author(s):  
H. R. Gong ◽  
Kyeongjae Cho
Keyword(s):  
Electronic Structure ◽  
Work Function ◽  
Metal Gate

scholarly journals Realization of N-Type Semiconducting of Phosphorene through Surface Metal Doping and Work Function Study

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Haocheng Sun ◽  
Yuan Shang ◽  
Yanmei Yang ◽  
Meng Guo
Keyword(s):  
Electronic Structure ◽  
Work Function ◽  
Valence Electron ◽  
Electron Configuration ◽  
Impurity States ◽  
Cu Doping ◽  
Na Doping ◽  
Surface Metal ◽  
Structure Engineering ◽  
Surface Metal Atom

Phosphorene becomes an important member of the layered nanomaterials since its discovery for the fabrication of nanodevices. In the experiments, pristine phosphorene shows p-type semiconducting with no exception. To reach its full capability, n-type semiconducting is a necessity. Here, we report the electronic structure engineering of phosphorene by surface metal atom doping. Five metal elements, Cu, Ag, Au, Li, and Na, have been considered which could form stable adsorption on phosphorene. These elements show patterns in their electron configuration with one valence electron in their outermost s-orbital. Among three group 11 elements, Cu can induce n-type degenerate semiconducting, while Ag and Au can only introduce localized impurity states. The distinct ability of Cu, compared to Ag and Au, is mainly attributed to the electronegativity. Cu has smaller electronegativity and thus denotes its electron to phosphorene, upshifting the Fermi level towards conduction band, resulting in n-type semiconducting. Ag and Au have larger electronegativity and hardly transfer electrons to phosphorene. Parallel studies of Li and Na doping support these findings. In addition, Cu doping effectively regulates the work function of phosphorene, which gradually decreases upon increasing Cu concentration. It is also interesting that Au can hardly change the work function of phosphorene.

Electronic structure of alkali metal overlayers on graphite

1986 ◽  
Vol 178 (1-3) ◽  
pp. 290-299 ◽  
Author(s):  
M.T. Johnson ◽  
H.I. Starnberg ◽  
H.P. Hughes
Keyword(s):  
Electronic Structure ◽  
Alkali Metal ◽  
Metal Overlayers
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