6 research outputs found
High-Performance ZnO Nanowire Transistors with Aluminum Top-Gate Electrodes and Naturally Formed Hybrid Self-Assembled Monolayer/AlO<sub><i>x</i></sub> Gate Dielectric
A method for the formation of a low-temperature hybrid gate dielectric for high-performance, top-gate ZnO nanowire transistors is reported. The hybrid gate dielectric consists of a self-assembled monolayer (SAM) and an aluminum oxide layer. The thin aluminum oxide layer forms naturally and spontaneously when the aluminum gate electrode is deposited by thermal evaporation onto the SAM-covered ZnO nanowire, and its formation is facilitated by the poor surface wetting of the aluminum on the hydrophobic SAM. The hybrid gate dielectric shows excellent electrical insulation and can sustain voltages up to 6 V. ZnO nanowire transistors utilizing the hybrid gate dielectric feature a large transconductance of 50 μS and large on-state currents of up to 200 μA at gate-source voltages of 3 V. The large on-state current is sufficient to drive organic light-emitting diodes with an active area of 6.7 mm<sup>2</sup> to a brightness of 445 cd/m<sup>2</sup>. Inverters based on ZnO nanowire transistors and thin-film carbon load resistors operate with frequencies up to 30 MHz
Eleven Nanometer Alignment Precision of a Plasmonic Nanoantenna with a Self-Assembled GaAs Quantum Dot
Plasmonics
offers the opportunity of tailoring the interaction
of light with single quantum emitters. However, the strong field localization
of plasmons requires spatial fabrication accuracy far beyond what
is required for other nanophotonic technologies. Furthermore, this
accuracy has to be achieved across different fabrication processes
to combine quantum emitters and plasmonics. We demonstrate a solution
to this critical problem by controlled positioning of plasmonic nanoantennas
with an accuracy of 11 nm next to single self-assembled GaAs semiconductor
quantum dots, whose position can be determined with nanometer precision.
These dots do not suffer from blinking or bleaching or from random
orientation of the transition dipole moment as colloidal nanocrystals
do. Our method introduces flexible fabrication of arbitrary nanostructures
coupled to single-photon sources in a controllable and scalable fashion
Ingenious Architecture and Coloration Generation in Enamel of Rodent Teeth
Teeth exemplify architectures comprising an interplay
of inorganic
and organic constituents, resulting in sophisticated natural composites.
Rodents (Rodentia) showcase extraordinary adaptations, with their
continuously growing incisors surpassing human teeth in functional
and structural optimizations. In this study, employing state-of-the-art
direct atomic-scale imaging and nanoscale spectroscopies, we present
compelling evidence that the release of material from ameloblasts
and the subsequent formation of iron-rich enamel and surface layers
in the constantly growing incisors of rodents are complex orchestrated
processes, intricately regulated and independent of environmental
factors. The synergistic fusion of three-dimensional tomography and
imaging techniques of etched rodent́s enamel unveils a direct
correlation between the presence of pockets infused with ferrihydrite-like
material and the acid resistant properties exhibited by the iron-rich
enamel, fortifying it as an efficient protective shield. Moreover,
observations using optical microscopy shed light on the role of iron-rich
enamel as a microstructural element that acts as a path for color
transmission, although the native color remains indistinguishable
from that of regular enamel, challenging the prevailing paradigms.
The redefinition of “pigmented enamel” to encompass
ferrihydrite-like infusion in rodent incisors reshapes our perception
of incisor microstructure and color generation. The functional significance
of acid-resistant iron-rich enamel and the understanding of the underlying
coloration mechanism in rodent incisors have far-reaching implications
for human health, development of potentially groundbreaking dental
materials, and restorative dentistry. These findings enable the creation
of an entirely different class of dental biomaterials with enhanced
properties, inspired by the ingenious designs found in nature
Ingenious Architecture and Coloration Generation in Enamel of Rodent Teeth
Teeth exemplify architectures comprising an interplay
of inorganic
and organic constituents, resulting in sophisticated natural composites.
Rodents (Rodentia) showcase extraordinary adaptations, with their
continuously growing incisors surpassing human teeth in functional
and structural optimizations. In this study, employing state-of-the-art
direct atomic-scale imaging and nanoscale spectroscopies, we present
compelling evidence that the release of material from ameloblasts
and the subsequent formation of iron-rich enamel and surface layers
in the constantly growing incisors of rodents are complex orchestrated
processes, intricately regulated and independent of environmental
factors. The synergistic fusion of three-dimensional tomography and
imaging techniques of etched rodent́s enamel unveils a direct
correlation between the presence of pockets infused with ferrihydrite-like
material and the acid resistant properties exhibited by the iron-rich
enamel, fortifying it as an efficient protective shield. Moreover,
observations using optical microscopy shed light on the role of iron-rich
enamel as a microstructural element that acts as a path for color
transmission, although the native color remains indistinguishable
from that of regular enamel, challenging the prevailing paradigms.
The redefinition of “pigmented enamel” to encompass
ferrihydrite-like infusion in rodent incisors reshapes our perception
of incisor microstructure and color generation. The functional significance
of acid-resistant iron-rich enamel and the understanding of the underlying
coloration mechanism in rodent incisors have far-reaching implications
for human health, development of potentially groundbreaking dental
materials, and restorative dentistry. These findings enable the creation
of an entirely different class of dental biomaterials with enhanced
properties, inspired by the ingenious designs found in nature
Ingenious Architecture and Coloration Generation in Enamel of Rodent Teeth
Teeth exemplify architectures comprising an interplay
of inorganic
and organic constituents, resulting in sophisticated natural composites.
Rodents (Rodentia) showcase extraordinary adaptations, with their
continuously growing incisors surpassing human teeth in functional
and structural optimizations. In this study, employing state-of-the-art
direct atomic-scale imaging and nanoscale spectroscopies, we present
compelling evidence that the release of material from ameloblasts
and the subsequent formation of iron-rich enamel and surface layers
in the constantly growing incisors of rodents are complex orchestrated
processes, intricately regulated and independent of environmental
factors. The synergistic fusion of three-dimensional tomography and
imaging techniques of etched rodent́s enamel unveils a direct
correlation between the presence of pockets infused with ferrihydrite-like
material and the acid resistant properties exhibited by the iron-rich
enamel, fortifying it as an efficient protective shield. Moreover,
observations using optical microscopy shed light on the role of iron-rich
enamel as a microstructural element that acts as a path for color
transmission, although the native color remains indistinguishable
from that of regular enamel, challenging the prevailing paradigms.
The redefinition of “pigmented enamel” to encompass
ferrihydrite-like infusion in rodent incisors reshapes our perception
of incisor microstructure and color generation. The functional significance
of acid-resistant iron-rich enamel and the understanding of the underlying
coloration mechanism in rodent incisors have far-reaching implications
for human health, development of potentially groundbreaking dental
materials, and restorative dentistry. These findings enable the creation
of an entirely different class of dental biomaterials with enhanced
properties, inspired by the ingenious designs found in nature
Ingenious Architecture and Coloration Generation in Enamel of Rodent Teeth
Teeth exemplify architectures comprising an interplay
of inorganic
and organic constituents, resulting in sophisticated natural composites.
Rodents (Rodentia) showcase extraordinary adaptations, with their
continuously growing incisors surpassing human teeth in functional
and structural optimizations. In this study, employing state-of-the-art
direct atomic-scale imaging and nanoscale spectroscopies, we present
compelling evidence that the release of material from ameloblasts
and the subsequent formation of iron-rich enamel and surface layers
in the constantly growing incisors of rodents are complex orchestrated
processes, intricately regulated and independent of environmental
factors. The synergistic fusion of three-dimensional tomography and
imaging techniques of etched rodent́s enamel unveils a direct
correlation between the presence of pockets infused with ferrihydrite-like
material and the acid resistant properties exhibited by the iron-rich
enamel, fortifying it as an efficient protective shield. Moreover,
observations using optical microscopy shed light on the role of iron-rich
enamel as a microstructural element that acts as a path for color
transmission, although the native color remains indistinguishable
from that of regular enamel, challenging the prevailing paradigms.
The redefinition of “pigmented enamel” to encompass
ferrihydrite-like infusion in rodent incisors reshapes our perception
of incisor microstructure and color generation. The functional significance
of acid-resistant iron-rich enamel and the understanding of the underlying
coloration mechanism in rodent incisors have far-reaching implications
for human health, development of potentially groundbreaking dental
materials, and restorative dentistry. These findings enable the creation
of an entirely different class of dental biomaterials with enhanced
properties, inspired by the ingenious designs found in nature