scholarly journals Plasmon-assisted spin transition in gold nanostar@Spin Crossover heterostructures

2021 ◽  
Author(s):  
Roger Sanchis-Gual ◽  
Ramón Torres-Cavanillas ◽  
Marc Coronado Puchau ◽  
Mónica Giménez-Marqués ◽  
Eugenio Coronado
Keyword(s):  
Coordination Polymer ◽  
Spin Crossover ◽  
Spin Transition ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Gold Nanostar ◽  
Core Shell Nanoparticles

Herein we report the design of core@shell nanoparticles formed by a metallic Au nanostar core and a spin-crossover shell based on the magnetic coordination polymer [Fe(Htrz)2(trz)](BF4). This procedure is general...

scholarly journals Design of Bistable Gold@Spin-Crossover Core-Shell Nanoparticles Showing Large Electrical Responses for the Spin Switching

2019 ◽  
Author(s):  
Ramón Torres-Cavanillas ◽  
Rocher Sanchis-Gual ◽  
Julien Dugay ◽  
Marc Coronado-Puchau ◽  
Dr. Mónica Giménez Marqués ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Thermal Hysteresis ◽  
Spin Transition ◽  
Hysteresis Loops ◽  
Large Change ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Simple Protocol ◽  
Order Of Magnitude ◽  
Core Shell Nanoparticles

<p>A simple protocol to prepare core-shell gold@spin-crossover (Au@SCO) nanoparticles (NPs) based on the 1D spin-crossover [Fe(Htrz)<sub>2</sub>(trz)](BF<sub>4</sub>) coordination polymer is reported. The synthesis relies on a two-step approach consisting on a partial surface ligand substitution of the citrate-stabilized Au NPs followed by the controlled growth of a very thin layer of the SCO polymer. As a result, colloidally stable core@shell spherical NPs of 19 nm in size exhibiting a narrow distribution in sizes have been obtained, revealing a switchable SCOshell of <i>ca.</i>4 nm. Temperature-dependent charge transport measurements of an electrical device based on assemblies of these Au@SCO NPs display well-defined, reproducible and sharp thermal hysteresis loops in the conductance near room temperature. This device is characterized both, by a large change in conductance upon spin state switching, and a remarkable transition abruptness, as compared with other memory devices based on the pristine SCO NPs. As a result, the sensitivity of the device to the spin transition is dramatically improved, with values for the ON/OFF ratio which are an order of magnitude better than the best ones obtained in previous SCO devices.</p>

scholarly journals Design of Bistable Gold@Spin-Crossover Core-Shell Nanoparticles Showing Large Electrical Responses for the Spin Switching

2019 ◽  
Author(s):  
Ramón Torres-Cavanillas ◽  
Rocher Sanchis-Gual ◽  
Julien Dugay ◽  
Marc Coronado-Puchau ◽  
Dr. Mónica Giménez Marqués ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Thermal Hysteresis ◽  
Spin Transition ◽  
Hysteresis Loops ◽  
Large Change ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Simple Protocol ◽  
Order Of Magnitude ◽  
Core Shell Nanoparticles

<p>A simple protocol to prepare core-shell gold@spin-crossover (Au@SCO) nanoparticles (NPs) based on the 1D spin-crossover [Fe(Htrz)<sub>2</sub>(trz)](BF<sub>4</sub>) coordination polymer is reported. The synthesis relies on a two-step approach consisting on a partial surface ligand substitution of the citrate-stabilized Au NPs followed by the controlled growth of a very thin layer of the SCO polymer. As a result, colloidally stable core@shell spherical NPs of 19 nm in size exhibiting a narrow distribution in sizes have been obtained, revealing a switchable SCOshell of <i>ca.</i>4 nm. Temperature-dependent charge transport measurements of an electrical device based on assemblies of these Au@SCO NPs display well-defined, reproducible and sharp thermal hysteresis loops in the conductance near room temperature. This device is characterized both, by a large change in conductance upon spin state switching, and a remarkable transition abruptness, as compared with other memory devices based on the pristine SCO NPs. As a result, the sensitivity of the device to the spin transition is dramatically improved, with values for the ON/OFF ratio which are an order of magnitude better than the best ones obtained in previous SCO devices.</p>

scholarly journals Design of Bistable Gold@Spin‐Crossover Core–Shell Nanoparticles Showing Large Electrical Responses for the Spin Switching

2019 ◽  
Vol 31 (27) ◽  
pp. 1900039 ◽  
Author(s):  
Ramón Torres‐Cavanillas ◽  
Roger Sanchis‐Gual ◽  
Julien Dugay ◽  
Marc Coronado‐Puchau ◽  
Mónica Giménez‐Marqués ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles ◽  
Spin Switching ◽  
Electrical Responses

scholarly journals Hybrid spin-crossover nanostructures

2014 ◽  
Vol 5 ◽  
pp. 2230-2239 ◽  
Author(s):  
Carlos M Quintero ◽  
Gautier Félix ◽  
Iurii Suleimanov ◽  
José Sánchez Costa ◽  
Gábor Molnár ◽  
...  
Keyword(s):  
Thin Films ◽  
Physical Properties ◽  
Recent Progress ◽  
Spin Crossover ◽  
Core Shell ◽  
Multilayer Thin Films ◽  
Shell Nanoparticles ◽  
Spin Crossover Complexes ◽  
Review Reports ◽  
Core Shell Nanoparticles

This review reports on the recent progress in the synthesis, modelling and application of hybrid spin-crossover materials, including core–shell nanoparticles and multilayer thin films or nanopatterns. These systems combine, often in synergy, different physical properties (optical, magnetic, mechanical and electrical) of their constituents with the switching properties of spin-crossover complexes, providing access to materials with unprecedented capabilities.

scholarly journals Control of the Phase Stability in Spin-Crossover Core-Shell Nanoparticles through the Elastic Interface Energy

2017 ◽  
Vol 2018 (3-4) ◽  
pp. 435-442 ◽  
Author(s):  
Gautier Félix ◽  
Mirko Mikolasek ◽  
Gábor Molnár ◽  
William Nicolazzi ◽  
Azzedine Bousseksou
Keyword(s):  
Phase Stability ◽  
Spin Crossover ◽  
Interface Energy ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Elastic Interface ◽  
Core Shell Nanoparticles

scholarly journals Core–Shell Nanoparticles: Design of Bistable Gold@Spin‐Crossover Core–Shell Nanoparticles Showing Large Electrical Responses for the Spin Switching (Adv. Mater. 27/2019)

2019 ◽  
Vol 31 (27) ◽  
pp. 1970193
Author(s):  
Ramón Torres‐Cavanillas ◽  
Roger Sanchis‐Gual ◽  
Julien Dugay ◽  
Marc Coronado‐Puchau ◽  
Mónica Giménez‐Marqués ◽  
...  
Keyword(s):  
Spin Crossover ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles ◽  
Spin Switching ◽  
Electrical Responses

Facile and controllable synthesis of triplex Au@Ag–Pt@infinite coordination polymer core–shell nanoparticles for highly efficient immobilization of enzymes and enhanced electrochemical biosensing activity

RSC Advances ◽  
2016 ◽  
Vol 6 (89) ◽  
pp. 86025-86033 ◽  
Author(s):  
Lihua Wang ◽  
Yi Zeng ◽  
Aiguo Shen ◽  
Yingchun Fu ◽  
Lingwen Zeng ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Core Shell ◽  
Controllable Synthesis ◽  
Shell Nanoparticles ◽  
Highly Efficient ◽  
Electrochemical Biosensing ◽  
Immobilization Of Enzymes ◽  
Core Shell Nanoparticles

Well-dispersed Au@Ag–Pt@infinite coordination polymer core–shell nanoparticles (Au@Ag–Pt@ICPs NPs) are presented as effective host matrixes for biosensing of enzymes.

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