scholarly journals Digital Processing with a Hybrid Plasmonic Logic Nanogate

2021 ◽  
Author(s):  
Lara Al Nubani ◽  
Nicholas Dogantzis ◽  
Gregory Hodgson ◽  
Stefania Impellizzeri
Keyword(s):  
Gold Nanoparticle ◽  
Organic Molecules ◽  
Molecular Level ◽  
Digital Processing ◽  
Boolean Logic ◽  
Plasmonic Nanostructures ◽  
Logic Operation ◽  
Simple Strategy ◽  
Synergistic Combination

We developed a simple strategy to gate a plasmonic event with a hybrid photoresponsive compound capable of mimicking AND-type logic behaviour. Binary digits are encoded into ultraviolet and visible illumination (which are used as inputs) and the fluorescence of the molecule (the arithmetic output). The plasmonic process chosen is the visible lightcontrolled, gold-nanoparticle (AuNP) catalysed reduction of resazurin to resorufin, while the second optical input is the UVA-induced cleavage of a 2- nitrobenzyl quencher. The synergistic combination of plasmonic nanostructures and organic molecules allows for the manipulation of a programmable Boolean logic operation at the molecular level.

scholarly journals Digital Processing with a Hybrid Plasmonic Logic Nanogate

2021 ◽  
Author(s):  
Lara Al Nubani ◽  
Nicholas Dogantzis ◽  
Gregory Hodgson ◽  
Stefania Impellizzeri
Keyword(s):  
Gold Nanoparticle ◽  
Organic Molecules ◽  
Molecular Level ◽  
Digital Processing ◽  
Boolean Logic ◽  
Plasmonic Nanostructures ◽  
Logic Operation ◽  
Simple Strategy ◽  
Synergistic Combination

We developed a simple strategy to gate a plasmonic event with a hybrid photoresponsive compound capable of mimicking AND-type logic behaviour. Binary digits are encoded into ultraviolet and visible illumination (which are used as inputs) and the fluorescence of the molecule (the arithmetic output). The plasmonic process chosen is the visible lightcontrolled, gold-nanoparticle (AuNP) catalysed reduction of resazurin to resorufin, while the second optical input is the UVA-induced cleavage of a 2- nitrobenzyl quencher. The synergistic combination of plasmonic nanostructures and organic molecules allows for the manipulation of a programmable Boolean logic operation at the molecular level.

scholarly journals Nitrone Modified Gold Nanoparticles: Synthesis, Characterization and Their Potential as 18F-Labeled PET Probes via I-SPANC

2019 ◽  
Author(s):  
Sara Ghiassian ◽  
Lihai Yu ◽  
Pierangelo Gobbo ◽  
Ali nazemi ◽  
Tommaso Romagnoli ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Nmr Spectroscopy ◽  
Gold Nanoparticle ◽  
Molecular Level ◽  
Prosthetic Group ◽  
H Nmr ◽  
Nanoparticles Synthesis ◽  
Interfacial Strain ◽  
Pet Probes ◽  
High Degree

A bioorthogonal gold nanoparticle template displaying interfacial nitrone functional groups for bioorthogonal interfacial strain-promoted alkyne-nitrone cycloaddition (I-SPANC) reactions has been synthesized. The Nitrone-AuNPs were characterized in detail using <sup>1</sup>H NMR spectroscopy, TEM, TGA, and XPS and a nanoparticle raw formula was calculated. The ability to control the conjugation of molecules of interest at the molecular level onto the Nitrone-AuNPs template allowed us to create a methodology for the synthesis of AuNP-based radiolabeled probes with a high degree of loading using copper free, strained-promoted cycloaddition. To this end, we also describe the synthesis of a new prosthetic group containing a strained-alkyne capable of clicking hot <sup>18</sup>F-label onto complementary azide or nitrone labelled agents.

All-Optical Logic Gates Based on Quantum-Dot Semiconductor Optical Amplifier

2018 ◽  
Vol 27 (01n02) ◽  
pp. 1840013 ◽  
Author(s):  
Xiang Zhang ◽  
Sunil Thapa ◽  
Niloy K. Dutta
Keyword(s):  
Quantum Dot ◽  
Semiconductor Optical Amplifier ◽  
Logic Gates ◽  
Optical Amplifier ◽  
Boolean Logic ◽  
Photon Absorption ◽  
Hole Burning ◽  
Optical Logic ◽  
Logic Operation ◽  
All Optical

We propose a scheme to realize all-optical logic operation in quantum-dot semiconductor optical amplifier (QD-SOA) based Mach-Zehnder interferometer (MZI) considering the effects of two-photon absorption (TPA). During propagation of sub-picosecond pulses in QD-SOA, TPA leads to an additional change in carrier recovery dynamics in quantum-dots. We utilize a rate equation model to take into account carrier refill through TPA and nonlinear dynamics including carrier heating and spectral hole burning in the QD-SOA. The simulation results show the TPA induced pumping in the QD-SOA can reduce the pattern effect and increase the output quality of the all-optical logic operation. With TPA, this scheme is suitable for high speed Boolean logic operation at 320 Gb/s.

CHEMICALLY SELF-ASSEMBLED NANOELECTRONIC COMPUTING NETWORKS

1998 ◽  
Vol 09 (01) ◽  
pp. 1-35 ◽  
Author(s):  
S. BANDYOPADHYAY ◽  
V. P. ROYCHOWDHURY ◽  
D. B. JANES
Keyword(s):  
Self Assembly ◽  
Organic Molecules ◽  
Fault Tolerant ◽  
Molecular Wires ◽  
Logic Circuits ◽  
Boolean Logic ◽  
Computing Machinery ◽  
Self Organized ◽  
Processing Activity ◽  
Image Processors

Recent advances in chemical self-assembly will soon make it possible to synthesize extremely powerful computing machinery from metallic clusters and organic molecules. These self-organized networks can function as Boolean logic circuits, associative memory, image processors, and combinatorial optimizers. Computational or signal processing activity is elicited from simple charge interactions between clusters which are resistively/capacitively linked by conjugated molecular wires or ribbons. The resulting circuits are massively parallel, fault-tolerant, ultrafast, ultradense and dissipate very little power.

scholarly journals Nitrone Modified Gold Nanoparticles: Synthesis, Characterization and Their Potential as 18F-Labeled PET Probes via I-SPANC

2019 ◽  
Author(s):  
Sara Ghiassian ◽  
Lihai Yu ◽  
Pierangelo Gobbo ◽  
Ali nazemi ◽  
Tommaso Romagnoli ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Nmr Spectroscopy ◽  
Gold Nanoparticle ◽  
Molecular Level ◽  
Prosthetic Group ◽  
H Nmr ◽  
Nanoparticles Synthesis ◽  
Interfacial Strain ◽  
Pet Probes ◽  
High Degree

A bioorthogonal gold nanoparticle template displaying interfacial nitrone functional groups for bioorthogonal interfacial strain-promoted alkyne-nitrone cycloaddition (I-SPANC) reactions has been synthesized. The Nitrone-AuNPs were characterized in detail using <sup>1</sup>H NMR spectroscopy, TEM, TGA, and XPS and a nanoparticle raw formula was calculated. The ability to control the conjugation of molecules of interest at the molecular level onto the Nitrone-AuNPs template allowed us to create a methodology for the synthesis of AuNP-based radiolabeled probes with a high degree of loading using copper free, strained-promoted cycloaddition. To this end, we also describe the synthesis of a new prosthetic group containing a strained-alkyne capable of clicking hot <sup>18</sup>F-label onto complementary azide or nitrone labelled agents.

scholarly journals Influence of electrospray deposition on C60 molecular assemblies

2021 ◽  
Vol 12 ◽  
pp. 552-558
Author(s):  
Antoine Hinaut ◽  
Sebastian Scherb ◽  
Sara Freund ◽  
Zhao Liu ◽  
Thilo Glatzel ◽  
...  
Keyword(s):  
Organic Molecules ◽  
Thermal Evaporation ◽  
Molecular Level ◽  
High Vacuum ◽  
Good Alternative ◽  
Scanning Probe ◽  
Deposition Method ◽  
Electrospray Deposition ◽  
Molecular Assemblies ◽  
Oxide Substrates

Maintaining clean conditions for samples during all steps of preparation and investigation is important for scanning probe studies at the atomic or molecular level. For large or fragile organic molecules, where sublimation cannot be used, high-vacuum electrospray deposition is a good alternative. However, because this method requires the introduction into vacuum of the molecules from solution, clean conditions are more difficult to be maintained. Additionally, because the presence of solvent on the surface cannot be fully eliminated, one has to take care of its possible influence. Here, we compare the high-vacuum electrospray deposition method to thermal evaporation for the preparation of C60 on different surfaces and compare, for sub-monolayer coverages, the influence of the deposition method on the formation of molecular assemblies. Whereas the island location is the main difference for metal surfaces, we observe for alkali halide and metal oxide substrates that the high-vacuum electrospray method can yield single isolated molecules accompanied by surface modifications.

Surface-enhanced micro-CARS mapping of a nanostructured cerium dioxide/aluminum film surface with gold nanoparticle-bound organic molecules

2018 ◽  
Vol 49 (7) ◽  
pp. 1145-1154 ◽  
Author(s):  
Viktor I. Fabelinsky ◽  
Dimitrii N. Kozlov ◽  
Sergey N. Orlov ◽  
Yury N. Polivanov ◽  
Ivan A. Shcherbakov ◽  
...  
Keyword(s):  
Gold Nanoparticle ◽  
Cerium Dioxide ◽  
Organic Molecules ◽  
Film Surface ◽  
Aluminum Film ◽  
Surface Enhanced

Absorbance enhancement of aptamers/GNP enables sensitive protein detection in rat brains

2018 ◽  
Vol 54 (10) ◽  
pp. 1193-1196 ◽  
Author(s):  
Jinpeng Mao ◽  
Muzhen Xu ◽  
Wenliang Ji ◽  
Meining Zhang
Keyword(s):  
Gold Nanoparticle ◽  
Interferon Gamma ◽  
Protein Detection ◽  
Simple Strategy

A simple strategy based on the absorbance enhancement of gold nanoparticle assembled aptamers for the detection of proteins, such as interferon-gamma, in rat brains was developed.

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