Molecular electronics behaviour of l-aspartic acid using symmetrical metal electrodes

2021 ◽  
Vol 27 (11) ◽  
Author(s):  
Gaurav Sikri ◽  
Ravinder Singh Sawhney
Keyword(s):  
Aspartic Acid ◽  
Molecular Electronics ◽  
Metal Electrodes

NANOPATTERNED CROSSBAR STRUCTURES FOR MOLECULAR ELECTRONICS

2005 ◽  
Vol 04 (04) ◽  
pp. 461-465
Author(s):  
JIE DENG ◽  
BENG TIAM SAW ◽  
K. H. AARON LAU ◽  
OLIVER WILHELMI ◽  
HERBERT O. MOSER ◽  
...  
Keyword(s):  
Molecular Electronics ◽  
Electron Beam Lithography ◽  
Intermediate Layer ◽  
Pattern Transfer ◽  
Metal Electrodes ◽  
Nanoelectronic Devices ◽  
Current Voltage ◽  
Current Voltage Characteristics ◽  
Crossbar Architecture ◽  
Crossing Point

Nano-patterned crossbar structures were fabricated as test structures for the development of nanoelectronic devices based on functional molecules. The crossbar structures serve as a platform for testing electronic properties of molecules and their interface to metal electrodes. The fabrication of the crossbar structures involved electron-beam lithography of sub-100-nm features aligned to electrodes pre-patterned by UV lithography and the deposition of and pattern transfer into an intermediate layer. The molecules to be tested were self-assembled as a monolayer on the nano-patterned area. The top electrode structures were subsequently deposited on top of the intermediate layer. The crossbar architecture allows measuring the current-voltage characteristics across the molecules for each crossing point individually.

scholarly journals Interface electronic structures of reversible double-docking self-assembled monolayers on an Au(111) surface

2014 ◽  
Vol 372 (2013) ◽  
pp. 20130018 ◽  
Author(s):  
Tian Zhang ◽  
Zhongyun Ma ◽  
Linjun Wang ◽  
Jinyang Xi ◽  
Zhigang Shuai
Keyword(s):  
Fermi Level ◽  
Work Function ◽  
Molecular Electronics ◽  
Electronic Structures ◽  
Density Functional ◽  
Systematic Investigation ◽  
Self Assembled Monolayers ◽  
Metal Electrodes ◽  
Assembled Monolayers ◽  
Self Assembled

Double-docking self-assembled monolayers (DDSAMs), namely self-assembled monolayers (SAMs) formed by molecules possessing two docking groups, provide great flexibility to tune the work function of metal electrodes and the tunnelling barrier between metal electrodes and the SAMs, and thus offer promising applications in both organic and molecular electronics. Based on the dispersion-corrected density functional theory (DFT) in comparison with conventional DFT, we carry out a systematic investigation on the dual configurations of a series of DDSAMs on an Au(111) surface. Through analysing the interface electronic structures, we obtain the relationship between single molecular properties and the SAM-induced work-function modification as well as the level alignment between the metal Fermi level and molecular frontier states. The two possible conformations of one type of DDSAM on a metal surface reveal a strong difference in the work-function modification and the electron/hole tunnelling barriers. Fermi-level pinning is found to be a key factor to understand the interface electronic properties.

Transmission Electron Microscopy of Evaporated Perylene Thin Films

1990 ◽  
Vol 48 (2) ◽  
pp. 336-337
Author(s):  
C. Ewins ◽  
J.R. Fryer
Keyword(s):  
Electron Microscopy ◽  
Thin Films ◽  
Transmission Electron Microscopy ◽  
Molecular Electronics ◽  
High Vacuum ◽  
Amorphous Layer ◽  
Electric Heater ◽  
Transmission Electron ◽  
Polycyclic Aromatic

The preparation of thin films of organic molecules is currently receiving much attention because of the need to produce good quality thin films for molecular electronics. We have produced thin films of the polycyclic aromatic, perylene C10H12 by evaporation under high vacuum onto a potassium chloride (KCl) substrate. The role of substrate temperature in determining the morphology and crystallography of the films was then investigated by transmission electron microscopy (TEM).The substrate studied was the (001) face of a freshly cleaved crystal of KCl. The temperature of the KCl was controlled by an electric heater or a cold finger. The KCl was heated to 200°C under a vacuum of 10-6 torr and allowed to cool to the desired temperature. The perylene was then evaporated over a period of one minute from a molybdenum boat at a distance of 10cm from the KCl. The perylene thin film was then backed with an amorphous layer of carbon and floated onto copper microscope grids.

Analysis of Aspartic Acid at Position 9 of the HLA-C Molecule in Patients with Psoriasis Vulgaris.

1996 ◽  
Vol 58 (6) ◽  
pp. 991-993
Author(s):  
Eishin MORITA ◽  
Susumu SHINODA ◽  
Eiichi GYOTOKU ◽  
Satoko HIHARA ◽  
Shoso YAMAMOTO
Keyword(s):  
Aspartic Acid ◽  
Psoriasis Vulgaris

Preparation, Characterization and Preliminary Trichomonacidal Effect of Poly Aspartic Acid-metronidazole Nanoprodrug*

2009 ◽  
Vol 36 (8) ◽  
pp. 1056-1063
Author(s):  
Xiao-Hong QI ◽  
Xi-Min CHEN ◽  
Zhen-Qing FENG ◽  
Xiao-Hong GUAN ◽  
Jun WU ◽  
...  
Keyword(s):  
Aspartic Acid

Kinetics of the Thermal Disappearance of Radicals Formed During the Radiolysis of Aspartic Acid

2009 ◽  
Vol 59 (12) ◽  
Author(s):  
Mihai Contineanu ◽  
iulia Contineanu ◽  
Ana Neacsu ◽  
Stefan Perisanu
Keyword(s):  
Thermal Resistance ◽  
Aspartic Acid ◽  
Room Temperature ◽  
Esr Spectra ◽  
Complex Mechanism ◽  
Radical Species ◽  
Mechanisms Of Formation ◽  
Kinetics Of

The radiolysis of the isomers L-, D- and DL- of the aspartic acid, in solid polycrystalline state, was investigated at room temperature. The analysis of their ESR spectra indicated the formation of at least two radicalic entities. The radical, identified as R3, resulting from the deamination of the acid, exhibits the highest concentration and thermal resistance. Possible mechanisms of formation of three radical species are suggested, based also on literature data. The kinetics of the disappearance of radical R3 indicated a complex mechanism. Three possible variants were suggested for this mechanism.

Enzymatic Synthesis of 15N-L-aspartic Acid Using Recombinant Aspartase from Escherichia Coli K12

2008 ◽  
Vol 59 (11) ◽  
Author(s):  
Iulia Lupan ◽  
Sergiu Chira ◽  
Maria Chiriac ◽  
Nicolae Palibroda ◽  
Octavian Popescu
Keyword(s):  
Amino Acids ◽  
Aspartic Acid ◽  
Enzymatic Synthesis ◽  
Large Scale ◽  
Recombinant Dna ◽  
Industrial Enzymes ◽  
Recombinant Dna Technology ◽  
Bacterial Fermentation ◽  
Natural Protein ◽  
Novel Method

Amino acids are obtained by bacterial fermentation, extraction from natural protein or enzymatic synthesis from specific substrates. With the introduction of recombinant DNA technology, it has become possible to apply more rational approaches to enzymatic synthesis of amino acids. Aspartase (L-aspartate ammonia-lyase) catalyzes the reversible deamination of L-aspartic acid to yield fumaric acid and ammonia. It is one of the most important industrial enzymes used to produce L-aspartic acid on a large scale. Here we described a novel method for [15N] L-aspartic synthesis from fumarate and ammonia (15NH4Cl) using a recombinant aspartase.

Sign in / Sign up

Export Citation Format

Share Document