scholarly journals Manipulating Electronic Structure from the Bottom-Up: Colloidal Nanocrystal-Based Semiconductors

2020 ◽  
Vol 11 (21) ◽  
pp. 9255-9264
Author(s):  
Sebastian Volk ◽  
Nuri Yazdani ◽  
Vanessa Wood
Keyword(s):  
Electronic Structure ◽  
Bottom Up

scholarly journals Electronic structure of a subnanometer wide bottom-up fabricated graphene nanoribbon: End states, band gap, and dispersion

2012 ◽  
Vol 86 (8) ◽  
Author(s):  
C. Bronner ◽  
F. Leyssner ◽  
S. Stremlau ◽  
M. Utecht ◽  
P. Saalfrank ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Band Gap ◽  
Graphene Nanoribbon ◽  
Bottom Up

scholarly journals Concentration Dependence of Dopant Electronic Structure in Bottom-up Graphene Nanoribbons

Nano Letters ◽  
2018 ◽  
Vol 18 (6) ◽  
pp. 3550-3556 ◽  
Author(s):  
Zahra Pedramrazi ◽  
Chen Chen ◽  
Fangzhou Zhao ◽  
Ting Cao ◽  
Giang D. Nguyen ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Concentration Dependence ◽  
Graphene Nanoribbons ◽  
Bottom Up

scholarly journals From electronic structure to phase diagrams: A bottom-up approach to understand the stability of titanium–transition metal alloys

2016 ◽  
Vol 113 ◽  
pp. 311-319 ◽  
Author(s):  
Liang-Feng Huang ◽  
Blazej Grabowski ◽  
Jian Zhang ◽  
Min-Jie Lai ◽  
C. Cem Tasan ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Transition Metal ◽  
Phase Diagrams ◽  
Metal Alloys ◽  
Bottom Up ◽  
Transition Metal Alloys ◽  
The Stability

Interfacial water at the trialanine hydrophilic surface: a DFT electronic structure and bottom-up investigation

2015 ◽  
Vol 17 (26) ◽  
pp. 17101-17111 ◽  
Author(s):  
Giuseppe Lanza ◽  
Maria Assunta Chiacchio
Keyword(s):  
Electronic Structure ◽  
Interfacial Water ◽  
Hydrophilic Surface ◽  
Bottom Up ◽  
Hydrogen Bonded

A model describing a network of hydrogen bonded water-trialanine has been developed to estimate hydration effects on various conformers of the peptide.

scholarly journals Tunable spin polarization and electronic structure of bottom-up synthesized MoSi2N4 materials

2021 ◽  
Vol 104 (20) ◽  
Author(s):  
Rajibul Islam ◽  
Barun Ghosh ◽  
Carmine Autieri ◽  
Sugata Chowdhury ◽  
Arun Bansil ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Spin Polarization ◽  
Bottom Up

scholarly journals The eternal youth of azobenzene: new photoactive molecular and supramolecular devices

2015 ◽  
Vol 87 (6) ◽  
pp. 537-545 ◽  
Author(s):  
Massimo Baroncini ◽  
Giulio Ragazzon ◽  
Serena Silvi ◽  
Margherita Venturi ◽  
Alberto Credi
Keyword(s):  
Electronic Structure ◽  
High Efficiency ◽  
External Control ◽  
Molecular Devices ◽  
Bottom Up ◽  
Molecular Systems ◽  
Chemical Systems ◽  
Physico Chemical ◽  
Light Excitation ◽  
Supramolecular Devices

AbstractThe development of multicomponent chemical systems that can perform predetermined functions under external control – i.e., molecular devices – is a challenging task in chemistry and a fascinating objective in the frame of a bottom-up approach to nanostructures. Photochromic units undergo profound changes in their chemical and/or electronic structure upon light excitation, and are highly interesting for the construction of photocontrollable molecular devices, machines and materials. The E–Z photoisomerization of azobenzene – owing to its high efficiency, excellent reversibility and significant physico-chemical differences between the two forms – is a highly useful reaction in this regard. Azobenzene photoisomerization has been known for almost 80 years and has been exploited to implement light-induced functionalities with a large variety of compounds, biomolecules, nanosystems and materials. Here we present some of our recent investigations highlighting how this outstanding photochrome can be utilized to develop (supra)molecular systems with valuable light-induced functionalities.

scholarly journals Chromophores of chromophores: a bottom-up Hückel picture of the excited states of photoactive proteins

2017 ◽  
Vol 19 (44) ◽  
pp. 29772-29779 ◽  
Author(s):  
Cate S. Anstöter ◽  
Charlie R. Dean ◽  
Jan R. R. Verlet
Keyword(s):  
Electronic Structure ◽  
Excited States ◽  
Bottom Up ◽  
Essential Component

Many photoactive proteins contain chromophores based on para-substituted phenolate anions which are an essential component of their electronic structure.

EELS Measurement of the Local Electronic Structure of Copper Atoms Segregated to Aluminum Grain Boundaries

1996 ◽  
Vol 54 ◽  
pp. 342-343
Author(s):  
S.J. Splinter ◽  
J. Bruley ◽  
P.E. Batson ◽  
D.A. Smith ◽  
R. Rosenberg
Keyword(s):  
Electronic Structure ◽  
Grain Boundaries ◽  
Boundary Segregation ◽  
Thin Layers ◽  
Nominal Composition ◽  
Spatially Resolved ◽  
Service Lifetime ◽  
Heat Treated ◽  
Probe Size ◽  
Local Electronic Structure

It has long been known that the addition of Cu to Al interconnects improves the resistance to electromigration failure. It is generally accepted that this improvement is the result of Cu segregation to Al grain boundaries. The exact mechanism by which segregated Cu increases service lifetime is not understood, although it has been suggested that the formation of thin layers of θ-CuA12 (or some metastable substoichiometric precursor, θ’ or θ”) at the boundaries may be necessary. This paper reports measurements of the local electronic structure of Cu atoms segregated to Al grain boundaries using spatially resolved EELS in a UHV STEM. It is shown that segregated Cu exists in a chemical environment similar to that of Cu atoms in bulk θ-phase precipitates.Films of 100 nm thickness and nominal composition Al-2.5wt%Cu were deposited by sputtering from alloy targets onto NaCl substrates. The samples were solution heat treated at 748K for 30 min and aged at 523K for 4 h to promote equilibrium grain boundary segregation. EELS measurements were made using a Gatan 666 PEELS spectrometer interfaced to a VG HB501 STEM operating at 100 keV. The probe size was estimated to be 1 nm FWHM. Grain boundaries with the narrowest projected width were chosen for analysis. EDX measurements of Cu segregation were made using a VG HB603 STEM.

Electronic structure studies of conducting polymers by electron energy-loss spectroscopy

1996 ◽  
Vol 54 ◽  
pp. 160-161
Author(s):  
J. Fink
Keyword(s):  
Electronic Structure ◽  
Conducting Polymers ◽  
Conjugated Polymers ◽  
Electron Acceptors ◽  
Electron Donors ◽  
Light Emitting ◽  
One Dimensional ◽  
New Class ◽  
Electrical Conductivities ◽  
Electron Energy Loss

Conducting polymers comprises a new class of materials achieving electrical conductivities which rival those of the best metals. The parent compounds (conjugated polymers) are quasi-one-dimensional semiconductors. These polymers can be doped by electron acceptors or electron donors. The prototype of these materials is polyacetylene (PA). There are various other conjugated polymers such as polyparaphenylene, polyphenylenevinylene, polypoyrrole or polythiophene. The doped systems, i.e. the conducting polymers, have intersting potential technological applications such as replacement of conventional metals in electronic shielding and antistatic equipment, rechargable batteries, and flexible light emitting diodes.Although these systems have been investigated almost 20 years, the electronic structure of the doped metallic systems is not clear and even the reason for the gap in undoped semiconducting systems is under discussion.

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