Laura Natalia Serkovic Loli

Laura Natalia Serkovic Loli
Centro Atómico Bariloche · Surface Physics

PhD in Physics

About

32
Publications
7,166
Reads
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318
Citations
Additional affiliations
November 2019 - present
Centro Atómico Bariloche
Position
  • Research Associate
October 2015 - October 2019
Universidad Nacional Autónoma de México
Position
  • Research Associate
April 2014 - October 2015
Universidad Nacional Autónoma de México
Position
  • PostDoc Position

Publications

Publications (32)
Article
The synthesis of antimonene and related 2D Sb films on top of metallic substrates has recently become a very active subject due to the strong spin-orbit coupling and the envisaged topological properties of this novel material. Gold has been used as a standard substrate for other 2D films, but in the case of Sb, no success has yet been reported main...
Article
In recent years the most studied carbon allotrope has been graphene, due to the outstanding properties that this two-dimensional material exhibits; however, it turns out to be a difficult material to produce, pattern and transfer to a device substrate without contamination. Carbon microelectromechanical systems (C-MEMS) are a versatile technology u...
Article
In this work, we report the electron mobility and electron density of three graphene field effect transistors using a 280 nm titanium dioxide dielectric layer and a graphene channel of area 300 × 300 μm². We achieve electron mobilities up to 1877 cm²/V and the Dirac point appears in small gate voltages, as compared to similar SiO2 transistors. Also...
Article
The pulsed Townsend technique has been used to measure transport coefficients in mixtures of tetrahydrofuran (THF) with N2 and argon. These measurements are the first investigations of swarm transport in gas mixtures with THF, with the drift velocity and effective Townsend ionization coefficient reported for a range of reduced electric fields betwe...
Article
Full-text available
In this work, we present a low-cost computer controlled, Arduino-based automation of the mass flow controllers for a chemical vapor deposition system. The major goal of the system is to provide the possibility to produce flow ramps of several gases for material synthesis. We used an Arduino Due board that only has the possibility to control two sig...
Article
The drift velocity and first Townsend ionization coefficient of electrons in gaseous tetrahydrofuran are measured over the range of reduced electric fields 4-1000 Td using a pulsed-Townsend technique. The measured drift velocities and Townsend ionization coefficients are subsequently used, in conjunction with a multi-term Boltzmann equation analysi...
Article
The structure of the quasicrystalline approximant Al13Co4(100) has been determined by surface x-ray diffraction (SXRD) and complementary density-functional-theory (DFT) calculations. Thanks to the use of a two-dimensional pixel detector, which speeds up the data acquisition enormously, an exceptionally large set of experimental data, consisting of...
Article
Full-text available
When subjected to electromagnetic radiation, the fluctuation of the electronic current across a quantum conductor increases. This additional noise, called photon-assisted shot noise, arises from the generation and subsequent partition of electron-hole pairs in the conductor. The physics of photon-assisted shot noise has been thoroughly investigated...
Article
Double electron detachment cross sections for methane and nitric oxide negative ions passing through oxygen and nitrogen gas targets have been studied in the energy ranges of 2.0–10.0 keV for CH and 4.0–10.0 keV for NO−. The signal growth rate method was employed. Fragmentation was only observed for NO− anions colliding with both targets. In the ca...
Article
Energy deposition of heavy ions when penetrating a material is of crucial importance in determining the damage to materials with implications in areas such as material science, plasma physics, radiotherapy and dosimetry. Due to the N-body electron problem, it has been thought that the electronic stopping cross section is unique for a given projecti...
Article
Oxidation of the Al9Co2(0 0 1) and Al13Co4(1 0 0) surfaces has been performed in a wide range of temperatures at 2 × 10−8 or 1 × 10−7 mbar oxygen pressure. Only AlO bonding is observed. The oxidation kinetics are controlled by the quantity of oxygen sticking on the surface. Oxidation results from a competition between several effects: formation of...
Article
Complex metallic alloys having isolated transition-metal elements in the surface layer have been reported to work well as selective hydrogenation catalysts. We report an experimental determination of the surface structure of one such compound Al13Fe4(010). The structure was determined using low-energy electron diffraction. The best-fit structure te...
Article
The first stages of oxidation of the (1 1 0) surface of a γ-Al4Cu9 complex metallic alloy were investigated by combining x-ray photoemission spectroscopy, low energy electron diffraction and scanning tunnel microscopy studies. Oxidation at room temperature in the 2 × 10(-8) to 2 × 10(-7) mbar oxygen pressure range occurs in two steps: a fast regime...
Article
Full-text available
Earlier studies of C-60 adsorption on Au(111) reported many interesting and complex features. We have performed coordinated low-energy electron diffraction, scanning tunneling microscopy (STM), and density functional theory studies to elucidate some of the details of the monolayer commensurate (2 root 3 x 2 root 3) R30 degrees phase. We have identi...
Article
Full-text available
C60 monolayers grown on Ag(111) at room temperature form incommensurate lattices that convert into a commensurate (23√ × 23√)R30° phase upon annealing. The C60 molecules in the commensurate phase have been observed to exist in three different states on Ag(111), namely bright, dim, and superbright (SB). All three species are in dynamical equilibrium...
Article
The first stages of oxidation of the (1 1 0) surface of a gamma-Al4Cu9 complex metallic alloy were investigated by combining x-ray photoemission spectroscopy, low energy electron diffraction and scanning tunnel microscopy studies. Oxidation at room temperature in the 2 x 10(-8) to 2 x 10(-7) mbar oxygen pressure range occurs in two steps: a fast re...
Article
Full-text available
Atomic oxygen adsorption on a pure aluminum terminated Al9Co2(001) surface is studied by first-principle calculations coupled with STM measurements. Relative adsorption energies of oxygen atoms have been calculated on different surface sites along with the associated STM images. The local electronic structure of the most favourable adsorption site...
Article
Full-text available
A combined experimental and theoretical study of the energy loss of protons in fluorides is presented. The measurements were performed in fresh AlF3 evaporated in situ on self-supported C foils, extending the low-energy range from 25 down to 0.7 keV. The transmission method is used in combination with time-of-flight spectrometry. The experimental s...
Article
Full-text available
We have investigated the structure of the Al13Fe4(010) surface using both experimental and ab initio computational methods. The results indicate that the topmost surface layers correspond to incomplete puckered (P) planes present in the bulk crystal structure. The main building block of the corrugated termination consists of two adjacent pentagons...
Article
Full-text available
We have used scanning tunneling microscopy (STM), low-energy electron diffraction (LEED), and density functional theory (DFT) to elucidate the structure and thermodynamics of the (2√3 × 2√3)R30° phase of C60 on Ag(111), which consists of a mixture of molecules in two different site/orientation states. The structure analysis identifies the two types...
Article
Full-text available
A detailed study of the (001) surface of the Al(2)Cu crystal using both experimental and ab initio computational methods is presented in this work. The combination of both approaches gives many arguments to match the surface plane with a bulk truncated surface model terminated by incomplete Al planes. The missing rows of Al atoms lead to a 2√2×√2R...
Article
We present a detailed study of the (001) surface of the Al9Co2 crystal using both experimental methods and first-principles calculations based on the density functional theory. Experimentally, the (1 x 1) low-energy electron diffraction pattern combined with the composition determined using X-ray photoemission spectroscopy is consistent with a bulk...
Article
Full-text available
A combined experimental and theoretical study of the energy loss of protons in fluorides and organic films is presented. The measurements were performed in fresh AlF3, LiF, and N,N′-bis(1-ethylpropyl)-perylene-3,4,9,10-tetracarboxdiimide (EP-PTCDI) evaporated in situ on self-supported C or Ag foils, covering the very low energy range from 25 keV do...
Article
Full-text available
We report a multi-technique study of the adsorption kinetics and self-assembly characteristics of EP-PTCDI grown on Ag(111) at UHV conditions and room temperature. Changes in the valence band characteristics for the mono and the multilayer film and the stability as a function of the annealing temperature are discussed. The results show that the mol...
Article
Full-text available
In this work we studied the growth and desorption of N,N’-bis(1-ethylpropyl)-perylene 3,4,9,10-tetracarboxdiimide (EP-PTCDI) films on Ag(111) under ultra-high-vacuum conditions by AFM, STM experimental techniques and DFT calculations. STM images corresponding to the adsorption process for coverages less than 0.3 ML show that the interaction with th...
Article
Full-text available
In this work we studied the growth of N,N’-bis(1-ethylpropyl)-perylene-3,4,9,10-tetracarboxdiimide (EP-PTCDI) films on Si(111) 7×7 surfaces under ultra-high-vacuum conditions, from submonolayer coverages up to 20 nm thin films by means of STM and AFM. The STM images were taken with 1V sample bias polarization (empty states) and 50 pA constant tunne...
Article
We have studied the self-assembly characteristics, the electronic structure, and the thermal stability of thin N,N′-bis(1-ethylpropyl)perylene-3,4,9,10-tetracarboxdiimide (EP-PTCDI) films grown on Ag (111) by a broad set of surface science analysis techniques. The deposition of single molecules to the formation of very thin films performed at room...
Article
Full-text available
En este trabajo se estudia el crecimiento de películas orgánicas e inorgánicas en diferentes sustratos, y la interacción de protones de baja velocidad con las mismas. En particular, se estudia el auto-ensamblado y la estabilidad térmica de moléculas orgánicas de EP-PTCDI en superficies de Si (111) y Ag (111) empleando numerosas técnicas de análisis...

Questions

Questions (8)
Question
We are doing an interface to control the MFCs but we are having trouble with the flow values displayed by the 247D power supply. We think we are not using correctly the scaling control factor, does anyone know how to use it for a 100sccm CH4 MFC.
Question
Can I use 99.97% purity methane or does it has to be 99.999? Thanks.
Question
I am looking for a good economic CVD furnace... can anyone recommend me a  brand? Thanks!
Question
In a vacuum chamber of pressures from 1 to 400 Tor and temperatures from 25 to 100°C. Thanks.
Question
Is it possible to upgrade a Scanning Electron Microscope to do e-beam lithography after it is bought? Is this just a matter of a good software? Thanks a lot!
Question
The product is discontinued and I can't find my manual. Thanks.
Question
How can I measure a powder in AFM (I don't have the platform to measure in liquids, just solids)? 

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