Nanomaterials Synthesis and Applications: Molecule-Based Devices
The constituent components of conventional devices are carved out of larger materials relying on physical methods. This top-down approach to engineered building blocks becomes increasingly challenging as the dimensions of the target structures approach th
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2. Nanomaterials Synthesis and Applications: Molecule-Based Devices 2.1
2.2
2.3
Chemical Approaches to Nanostructured Materials .................. 2.1.1 From Molecular Building Blocks to Nanostructures......................... 2.1.2 Nanoscaled Biomolecules: Nucleic Acids and Proteins............. 2.1.3 Chemical Synthesis of Artificial Nanostructures ............ 2.1.4 From Structural Control to Designed Properties and Functions.............................. Molecular Switches and Logic Gates ....... 2.2.1 From Macroscopic to Molecular Switches ................... 2.2.2 Digital Processing and Molecular Logic Gates ............. 2.2.3 Molecular AND, NOT, and OR Gates .. 2.2.4 Combinational Logic at the Molecular Level .................. 2.2.5 Intermolecular Communication ......
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Solid State Devices ................................ 2.3.1 From Functional Solutions to Electroactive and Photoactive Solids.................. 2.3.2 Langmuir–Blodgett Films .............. 2.3.3 Self-Assembled Monolayers ........... 2.3.4 Nanogaps and Nanowires..............
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Conclusions and Outlook .......................
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References ..................................................
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components. The rapid and continuous progress of this exploratory research will, we hope, lead to an entire generation of molecule-based devices that might ultimately find useful applications in a variety of fields, ranging from biomedical research to information technology.
Part A 2
The constituent components of conventional devices are carved out of larger materials relying on physical methods. This top-down approach to engineered building blocks becomes increasingly challenging as the dimensions of the target structures approach the nanoscale. Nature, on the other hand, relies on chemical strategies to assemble nanoscaled biomolecules. Small molecular building blocks are joined to produce nanostructures with defined geometries and specific functions. It is becoming apparent that nature’s bottom-up approach to functional nanostructures can be mimicked to produce artificial molecules with nanoscaled dimensions and engineered properties. Indeed, examples of artificial nanohelices, nanotubes, and molecular motors are starting to be developed. Some of these fascinating chemical systems have intriguing electrochemical and photochemical properties that can be exploited to manipulate chemical, electrical, and optical signals at the molecular level. This tremendous opportunity has lead to the development of the molecular equivalent of conventional logic gates. Simple logic operations, for example, can be reproduced with collections of molecules operating in solution. Most of these chemical systems, however, rely on bulk addressing to execute combinational and sequential logic operations. It is essential to devise methods to reproduce these useful functions in solid-state configurations and, eventually, with single molecules. These challenging objectives are stimulating the design of clever devices t
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