Gold Nanowires | Image Resource : nanopartz.com
The low-scale material represents an exciting and emergent interdisciplinary area that has begun to revolutionize a broad range of fields in chemistry, physics, engineering, energy, materials and life sciences.
Advances in the development of Gold Nanowires on the nanoscale over the past decade have led to a significant increase in knowledge on the fabrication of powerful devices or functional systems, ranging from nanoscale transistors, light-emitting diodes (LEDs), nano-lasers, nano-resonators, to ultrasensitive chemical/biological sensors and very promising energy devices.
A central challenge in the successful building of new and useful type of technology based on nanomaterials is to exploit the “micro-macro” duality of such structures, where the consequences of miniaturization can be extended to understand the macro world.
Gold nanowires in research
In this sense, two main paradigms in the field of nanoscience and nanotechnology have to be set up. Firstly, multiple instruments and tools must be created in order to maintain the architecture and structure of the Gold Nanowires.
The second important paradigm is to determine the chemical and physical consequences of miniaturization. This is where real nanoscience meets nanotechnology. Essentially, the central starting point for these challenges is the synthesis of the nanostructured materials, the building blocks in this case.
The controllable and tunnel able chemical composition, structure, size, morphology, and consequently defined electronic, optical/magnetic properties are critical to comprehensively understand the fundamental properties of these nanoscale structures and to further explore their physical limits as functional devices.
Last but not least, there is the hierarchical assembly and orgaThe low-scale material represents an exciting and emergent interdisciplinary area that has begun to revolutionize a broad range of fields in chemistry, physics, engineering, energy, materials and life sciences.
Advances in the development of Gold Nanowires on the nanoscale over the past decade have led to a significant increase in knowledge on the fabrication of powerful devices or functional systems, ranging from nanoscale transistors, light-emitting diodes (LEDs), nano-lasers, nano-resonators, to ultrasensitive chemical/biological sensors and very promising energy devices.
A central challenge in the successful building of new and useful type of technology based on nanomaterials is to exploit the “micro-macro” duality of such structures, where the consequences of miniaturization can be extended to understand the macro world.
Gold nanowires in research
In this sense, two main paradigms in the field of nanoscience and nanotechnology have to be set up. Firstly, multiple instruments and tools must be created in order to maintain the architecture and structure of the Gold Nanowires.
The second important paradigm is to determine the chemical and physical consequences of miniaturization. This is where real nanoscience meets nanotechnology. Essentially, the central starting point for these challenges is the synthesis of the nanostructured materials, the building blocks in this case.
The controllable and tunnel able chemical composition, structure, size, morphology, and consequently defined electronic, optical/magnetic properties are critical to comprehensively understand the fundamental properties of these nanoscale structures and to further explore their physical limits as functional devices.
Last but not least, there is the hierarchical assembly and organization of these building blocks into highly integrated systems with predictable and versatile functions. Ultrathin (diameter < 10 nm) metal nanowires are of great relevance in the fields of nano-sciences and nanotechnology. Ultrathin nanowires, compared to other low-dimensional systems, present a higher surface area and have two quantum-confined directions.
Introduction & Synthesis of nanowires of gold
While leaving one unconfined direction for electrical conduction, nanowires carve their niche amongst others. This makes usage of electrical conduction concept to be implemented into the scenario rather than tunnelling transport.
In addition to the high surface area, the very high density of their electronic states and also the joint density of states near the energies of their Van Hove singularities, enhanced excitation binding energy and increased surface scattering for electrons and photons are some ways in which nanowires differ from their corresponding bulk materials.
The recent developments in the respective fields have motivated and challenged the fabrication and the shrinkage of materials that can be rationally organized in functional networks. In this sense, nanowires are considered essential components that can be used to build nano-electronic devices for applications in sensors, photonics, and waveguides.
These nanowires are extremely attractive for such applications that have low electrical resistance and can transport light over their axial direction. The synthesis of Au nanowires has been widely reported on literature and it is the main focus of this section that intends to present and compare those approaches with the one claimed by Lu and co-workers to produce Gold Nanowires through Aurophilic interactions.
By coupling metal nanowire devices with biological cells based on the idea that the surface charge due to ions adsorption on the surface of nanowires can cause change in the electrical resistance of the nanowires, it will describe how the electrical activity of neuronal cells could be monitored using ultrathin metal nanowires.
Conclusions and Future Directions
Advances have been made recently in the chemical synthesis of ultrathin Au nanowires with diameters of ~ 2 nm. These one-dimensional nanostructures constitute sensors, photonics, and waveguides.
Although efforts have been made towards understanding their synthesis and their electrical characteristics, several questions remain open concerning the production of Gold Nanowires as well as their intrinsic electric properties.
The work for this thesis focused on improving the understanding of the chemical processes related to the formation of ultrathin Gold Nanowires and their electrical characteristics in air and in aqueous solutions.
Owing to their possible technological applications as sensors for chemical and biological species, this last aspect was important because it contributes to the knowledge of how the electrical resistance of wires can be influenced by the adsorption of ionic and molecular species on their surfaces.nization of these building blocks into highly integrated systems with predictable and versatile functions. Ultrathin (diameter < 10 nm) metal nanowires are of great relevance in the fields of nano-sciences and nanotechnology. Ultrathin nanowires, compared to other low-dimensional systems, present a higher surface area and have two quantum-confined directions.
Introduction & Synthesis of nanowires of gold
While leaving one unconfined direction for electrical conduction, nanowires carve their niche amongst others. This makes usage of electrical conduction concept to be implemented into the scenario rather than tunnelling transport.
In addition to the high surface area, the very high density of their electronic states and also the joint density of states near the energies of their Van Hove singularities, enhanced excitation binding energy and increased surface scattering for electrons and photons are some ways in which nanowires differ from their corresponding bulk materials.
The recent developments in the respective fields have motivated and challenged the fabrication and the shrinkage of materials that can be rationally organized in functional networks. In this sense, nanowires are considered essential components that can be used to build nano-electronic devices for applications in sensors, photonics, and waveguides.
These nanowires are extremely attractive for such applications that have low electrical resistance and can transport light over their axial direction. The synthesis of Au nanowires has been widely reported on literature and it is the main focus of this section that intends to present and compare those approaches with the one claimed by Lu and co-workers to produce Gold Nanowires through Aurophilic interactions.
By coupling metal nanowire devices with biological cells based on the idea that the surface charge due to ions adsorption on the surface of nanowires can cause change in the electrical resistance of the nanowires, it will describe how the electrical activity of neuronal cells could be monitored using ultrathin metal nanowires.
Conclusions and Future Directions
Advances have been made recently in the chemical synthesis of ultrathin Au nanowires with diameters of ~ 2 nm. These one-dimensional nanostructures constitute sensors, photonics, and waveguides.
Although efforts have been made towards understanding their synthesis and their electrical characteristics, several questions remain open concerning the production of Gold Nanowires as well as their intrinsic electric properties.
The work for this thesis focused on improving the understanding of the chemical processes related to the formation of ultrathin Gold Nanowires and their electrical characteristics in air and in aqueous solutions.
Owing to their possible technological applications as sensors for chemical and biological species, this last aspect was important because it contributes to the knowledge of how the electrical resistance of wires can be influenced by the adsorption of ionic and molecular species on their surfaces.
Advances in the development of Gold Nanowires on the nanoscale over the past decade have led to a significant increase in knowledge on the fabrication of powerful devices or functional systems, ranging from nanoscale transistors, light-emitting diodes (LEDs), nano-lasers, nano-resonators, to ultrasensitive chemical/biological sensors and very promising energy devices.
A central challenge in the successful building of new and useful type of technology based on nanomaterials is to exploit the “micro-macro” duality of such structures, where the consequences of miniaturization can be extended to understand the macro world.
Gold nanowires in research
In this sense, two main paradigms in the field of nanoscience and nanotechnology have to be set up. Firstly, multiple instruments and tools must be created in order to maintain the architecture and structure of the Gold Nanowires.
The second important paradigm is to determine the chemical and physical consequences of miniaturization. This is where real nanoscience meets nanotechnology. Essentially, the central starting point for these challenges is the synthesis of the nanostructured materials, the building blocks in this case.
The controllable and tunnel able chemical composition, structure, size, morphology, and consequently defined electronic, optical/magnetic properties are critical to comprehensively understand the fundamental properties of these nanoscale structures and to further explore their physical limits as functional devices.
Last but not least, there is the hierarchical assembly and orgaThe low-scale material represents an exciting and emergent interdisciplinary area that has begun to revolutionize a broad range of fields in chemistry, physics, engineering, energy, materials and life sciences.
Advances in the development of Gold Nanowires on the nanoscale over the past decade have led to a significant increase in knowledge on the fabrication of powerful devices or functional systems, ranging from nanoscale transistors, light-emitting diodes (LEDs), nano-lasers, nano-resonators, to ultrasensitive chemical/biological sensors and very promising energy devices.
A central challenge in the successful building of new and useful type of technology based on nanomaterials is to exploit the “micro-macro” duality of such structures, where the consequences of miniaturization can be extended to understand the macro world.
Gold nanowires in research
In this sense, two main paradigms in the field of nanoscience and nanotechnology have to be set up. Firstly, multiple instruments and tools must be created in order to maintain the architecture and structure of the Gold Nanowires.
The second important paradigm is to determine the chemical and physical consequences of miniaturization. This is where real nanoscience meets nanotechnology. Essentially, the central starting point for these challenges is the synthesis of the nanostructured materials, the building blocks in this case.
The controllable and tunnel able chemical composition, structure, size, morphology, and consequently defined electronic, optical/magnetic properties are critical to comprehensively understand the fundamental properties of these nanoscale structures and to further explore their physical limits as functional devices.
Last but not least, there is the hierarchical assembly and organization of these building blocks into highly integrated systems with predictable and versatile functions. Ultrathin (diameter < 10 nm) metal nanowires are of great relevance in the fields of nano-sciences and nanotechnology. Ultrathin nanowires, compared to other low-dimensional systems, present a higher surface area and have two quantum-confined directions.
Introduction & Synthesis of nanowires of gold
While leaving one unconfined direction for electrical conduction, nanowires carve their niche amongst others. This makes usage of electrical conduction concept to be implemented into the scenario rather than tunnelling transport.
In addition to the high surface area, the very high density of their electronic states and also the joint density of states near the energies of their Van Hove singularities, enhanced excitation binding energy and increased surface scattering for electrons and photons are some ways in which nanowires differ from their corresponding bulk materials.
The recent developments in the respective fields have motivated and challenged the fabrication and the shrinkage of materials that can be rationally organized in functional networks. In this sense, nanowires are considered essential components that can be used to build nano-electronic devices for applications in sensors, photonics, and waveguides.
These nanowires are extremely attractive for such applications that have low electrical resistance and can transport light over their axial direction. The synthesis of Au nanowires has been widely reported on literature and it is the main focus of this section that intends to present and compare those approaches with the one claimed by Lu and co-workers to produce Gold Nanowires through Aurophilic interactions.
By coupling metal nanowire devices with biological cells based on the idea that the surface charge due to ions adsorption on the surface of nanowires can cause change in the electrical resistance of the nanowires, it will describe how the electrical activity of neuronal cells could be monitored using ultrathin metal nanowires.
Conclusions and Future Directions
Advances have been made recently in the chemical synthesis of ultrathin Au nanowires with diameters of ~ 2 nm. These one-dimensional nanostructures constitute sensors, photonics, and waveguides.
Although efforts have been made towards understanding their synthesis and their electrical characteristics, several questions remain open concerning the production of Gold Nanowires as well as their intrinsic electric properties.
The work for this thesis focused on improving the understanding of the chemical processes related to the formation of ultrathin Gold Nanowires and their electrical characteristics in air and in aqueous solutions.
Owing to their possible technological applications as sensors for chemical and biological species, this last aspect was important because it contributes to the knowledge of how the electrical resistance of wires can be influenced by the adsorption of ionic and molecular species on their surfaces.nization of these building blocks into highly integrated systems with predictable and versatile functions. Ultrathin (diameter < 10 nm) metal nanowires are of great relevance in the fields of nano-sciences and nanotechnology. Ultrathin nanowires, compared to other low-dimensional systems, present a higher surface area and have two quantum-confined directions.
Introduction & Synthesis of nanowires of gold
While leaving one unconfined direction for electrical conduction, nanowires carve their niche amongst others. This makes usage of electrical conduction concept to be implemented into the scenario rather than tunnelling transport.
In addition to the high surface area, the very high density of their electronic states and also the joint density of states near the energies of their Van Hove singularities, enhanced excitation binding energy and increased surface scattering for electrons and photons are some ways in which nanowires differ from their corresponding bulk materials.
The recent developments in the respective fields have motivated and challenged the fabrication and the shrinkage of materials that can be rationally organized in functional networks. In this sense, nanowires are considered essential components that can be used to build nano-electronic devices for applications in sensors, photonics, and waveguides.
These nanowires are extremely attractive for such applications that have low electrical resistance and can transport light over their axial direction. The synthesis of Au nanowires has been widely reported on literature and it is the main focus of this section that intends to present and compare those approaches with the one claimed by Lu and co-workers to produce Gold Nanowires through Aurophilic interactions.
By coupling metal nanowire devices with biological cells based on the idea that the surface charge due to ions adsorption on the surface of nanowires can cause change in the electrical resistance of the nanowires, it will describe how the electrical activity of neuronal cells could be monitored using ultrathin metal nanowires.
Conclusions and Future Directions
Advances have been made recently in the chemical synthesis of ultrathin Au nanowires with diameters of ~ 2 nm. These one-dimensional nanostructures constitute sensors, photonics, and waveguides.
Although efforts have been made towards understanding their synthesis and their electrical characteristics, several questions remain open concerning the production of Gold Nanowires as well as their intrinsic electric properties.
The work for this thesis focused on improving the understanding of the chemical processes related to the formation of ultrathin Gold Nanowires and their electrical characteristics in air and in aqueous solutions.
Owing to their possible technological applications as sensors for chemical and biological species, this last aspect was important because it contributes to the knowledge of how the electrical resistance of wires can be influenced by the adsorption of ionic and molecular species on their surfaces.