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23Atomic Force Nano Microscope (AFM) is One of the Optical DevicesElsevier Bv 71. 2025.The recent advent of high-resolution imaging and force spectroscopy using atomic force mi- croscopy (AFM) in organic and inorganic solutions opens the way to imaging a wide variety of surfaces and their solvent structure. However, to take full advantage of the high resolution and provide signicant new analytical capability, a detailed understanding of the background contrast mechanisms that lead to atomic and molecular resolution is critical. Without a theory that connects the measured force to …Read more
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28Signal measurement Electrochemical methods are very suitable for detecting direct DNA oxidation because electrochemical reactions directly generate electronic signals and therefore do not require expensive converters. In addition, in this process, because the order of the immobilized game can be limited to onlya series of electrode substrates, the act of tracking is performed by a series of in expensive electrochemical analyzes. Electrochemical sensors are used to perform clinical or environment…Read more
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26Nanoelectronics Technology has Dedicated some Very Exciting Materials to Improve the Sensing PhenomenonChemrn Electrochemistry Ejournal , Elsevier Bv 7 ( 272562485). 2024.Note: Nanoelectronics technology has dedicated some very exciting materials to improve the sensing phenomenon. The use of various nanomaterials, including nanoparticles, nanotubes, nanotubes, and nanowires, causes faster identification and reproducibility in a much better way. The unique properties of nanomaterials such as high electrical conductivity, better shock tolerance, and sensitive responses such as versatile piezo-electric and color detection mechanisms are only results of the multitude…Read more
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42based on organic materials can be mechanically exible to a large extent because of the loose intermolecular bonds in the nano-electrons created from them. Unlike these organic materials, minerals such as silicon, germanium, and gallium arsenide can be used in the structure of electronic devices only in crystalline states, and in this case, covalent bonds make exibility impossible in them. Makes. Properties such as strength, exibility, electrical conductivity, magnetic properties, color, reactivi…Read more
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47Note: In general, in order to receive the electromagnetic wave in the space, the dimensions of the antenna must be in the order of the wavelength of the input to its surface. Due to the very small dimensions of nano sensors, nano antennas need to have a very high working frequency to be usable. The use of graphene helps to solve this problem to a great extent. The speed of propagation of waves in CNTs and GNRs can be 100 times lower than its speed in vacuum, and this is related to the physical s…Read more
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59MEMS Bio Has a Wide Range of Applications in Environmental and Drug Screening and DNA FragmentationEss Open Archive 12. 2024.MEMS is a structural technology, an example of the design and development of sophisticated, well integrated electronics systems and mechanical devices utilizing single-stage manufacturing techniques . Techniques for making the MEMS enables the components and equipment with performance and increased production are combined with the advantages of the ordinary, such as reducing the size of the physical volume, weight and cost and providing a basis for the production of non-manufacturing metho…Read more
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64The antenna is considered as the primary means of absorbing electromagnetic waves in space and has its own engineering knowledge, which is very developed and extensive. In general, in order to receive the electromagnetic wave in space, the dimensions of the antenna must be in the order of the size of the input wavelength to its surface. Due to the very low dimensions of nano-sensors, nano-antennas need a very high operating frequency to be usable. The use of graphene greatly helps to solve this …Read more
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70The antenna is considered as the primary means of absorbing electromagnetic waves in space and has its own engineering knowledge, which is very developed and extensive. In general, in order to receive the electromagnetic wave in space, the dimensions of the antenna must be in the order of the size of the input wavelength to its surface. Due to the very low dimensions of nano-sensors, nano-antennas need a very high operating frequency to be usable. The use of graphene greatly helps to solve this …Read more
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83Nowadays, many semiconductors such as silicon are used in a wide range of nanoelectronic devices. However, due to the range of thermal changes and its extremely high speed, nano diamond is only compared to gold nanoparticles, which is the second best nano semiconductor in the world. Nano graphite and graphene nano strips are electrically conductive due to cloud scattering. Active nano diamond particles with such features, especially electronic ones, can be the foundation of completely new types …Read more
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4The unique properties of nanomaterials such as high electrical conductivity, better shock tolerance, and sensitive responses such as versatile piezo-electric and color detection mechanisms are only results of the multitude of properties of nanomaterials. Different types of biosensors are propagated based on different types of nanomaterials and their developmental and implicit aspects. Measurement of biological responses has assumed great importance in the current scenario of ever-dynamic env…Read more
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67Devices based on organic materials can be mechanically flexible to a large extent because of the loose intermolecular bonds in the nano-electrons created from them. Unlike these organic materials, minerals such as silicon, germanium, and gallium arsenide can be used in the structure of electronic devices only in crystalline states, and in this case, covalent bonds make flexibility impossible in them. Makes. Properties such as strength, flexibility, electrical conductivity, magnetic properties, c…Read more
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78In general, in order to receive the electromagnetic wave in the space, the dimensions of the antenna must be in the order of the wavelength of the input to its surface. Due to the very small dimensions of nano sensors, nano antennas need to have a very high working frequency to be usable. The use of graphene helps to solve this problem to a great extent. The speed of propagation of waves in CNTs and GNRs can be 100 times lower than its speed in vacuum, and this is related to the physical structu…Read more
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53nanological gates, in order to design nano-scale computers with dual-scale capabilities. All living biological systems function due to the molecular interactions of different subsystems. Molecular components (proteins and nucleic acids, lipids and carbohydrates, DNA and RNA) can be used as an inspirational strategy on how to design high-performance NEMS and MEMS that have the required features and characteristics. Considered. In addition, analytical and numerical methods are available for dynami…Read more
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81Nanosupercapacitors, also called electrochemical supercapacitors or nanocapacitors, thus emerge as promising fuel sources with astonishingly fast charge release rates. Incredibly fast charging occurs. Created to improve power execution (high-speed capability), they still depend on similar inherent breakpoints. About the electrical characteristics and the manufacturing process of a nanocapacitor structure using (metalinsulator-carbon-metal nanotube layers). This structure shows high capacitance a…Read more
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52In smart electronic nano-structures, the concept of Nano -assemblies is summed up in all the information and codes necessary to produce an entity similar to itself. We have a very small machine that knows how to produce similar to itself , which in nano science is called a "nano-assembler". It is interpreted.
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90The development of biosensors to measure the concentration of dissolved oxygen in the blood began. This sensor is also called COBD because it covers the surface of the electrode with an enzyme whose constituent is sometimes called (electro-calorie). Later, it helped oxidize glucose. This sensor was used to measure blood sugar. In the same Bapvshandn electrode, an enzyme that has the ability to convert urea into ammonium carbonate in the electrode material ++ ion, NH4, was used to create biosenso…Read more
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71Note: The field-effect tunnel transistor nMOS is an experimental type of transistor. Even if its structure is very similar to a metal-oxide semiconductor field-effect transistor nMOS , the basic switching mechanisms in these two transistors differ from each other; nMOS instead of exhibiting thermionic emission modulation, changes through a quantum tunnel modulation 12> They change through a dam. The field-effect tunneling transistor nMOS, as an alternative to conventional CMOS by enabling the vo…Read more
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70FinFEET nanotransistors are field-effect nanotransistors (metal-oxide-semiconductor) that are made on asubstrate. The gate is located on two, three, or four sides of the channel or is wrapped. The channel forms adouble gate structure. These devices are given the general name "finfets" because the source/drain region formsfins on the silicon surface. FinFET devices, compared to flat technology and using nanowires in the structureand (complementary metal oxide and semiconductor), < a i=8>have sign…Read more
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95Note: In electrical conduction from a conductor to a semiconductor or an electrically changeable insulator, nanotubes depend on their molecular chiral structure and angle. Since carbon nanotubes are able to pass electric current through the ballistic transfer of electrons without friction from their surface-this current is a hundred times higher than the current that passes through a copper wire-the nanotube is an ideal choice for building nano memory cloud chips. Creating chipsNano memory cloud…Read more
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87Note: Many types of nanosensors are designed using CP nanomaterials for nanobiological applications. (Conductive surface) The oxidation of conductive polymeric materials is easily altered by redox mechanisms, and the charge transfer properties of these materials are affected by structural parameters, such as diameter and dimensions. CP materials are able to provide sensitive and rapid responses to specific biological and chemical species. Techniques such as chemical polymerization are often used…Read more
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101Note: NI_nanoparticle nickel nanoparticles is a strong conductor of electric current and its surface is shiny and polished. This element belongs to the group of iron and cobalt elementsUsing particles from the microscale to the nanoscale provides benefits for various scientific fields, but because a large percentage of their atoms is on the surface, nanomaterials can be highly reactive and pose risks. have a potential for humans. Nanoparticles are of great interest due to their wide application,…Read more
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79Graphene nanomemories have been developed molecularly, providing excellent programmable nanoscale memory performance compared to previous graphene memory devices and a memory window. Large (12V), fast switching speed (1 microsecond), shows strong electrical reliability. Graphene molecular nanomemories show unique electronic properties, and their small dimensions, structural strength, and high performance make them a charge storage medium for Nano memory applications. We use a set of techniques i…Read more
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64Electrostatic nanocapacitors also benefit from a very short distance between their electrodes. Electrostatic nanocapacitors are unique in this respect. If the electrodes are far apart, like charges on their surface strongly repel each other. When the electrodes are placed closer together, the negative and positive charges on both sides balance these repulsive forces, and more total charge can be stored in a given area.
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76To solve this problem , they usually use an intermediate layer of retarding materials such as Ta, w or Mo as a penetration barrier to improve the thermal stability of the Si/Cu layer . In the characterization of Si/Ta/Cu nanoparticles and multilayer systems, there is an effect of negative bias voltage on the improvement of the electrical and structural properties of the permeation barrier of the Ta sputtering layer in the Si/Ta system. Surface processes of the Si layer, including burning, are ca…Read more
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93In addition to that, the presence of particles prevents the selective reaction of internal nanotubes, and this issue of purity confuses nanotubes based on their size, type, or use as macromolecular species. Absorption spectroscopy (NIR-Vis-UV) can be used to check the population of the sample or the degree of grouping of the sample. If how to distribute nanotubes by NIR-Vis-UV absorption spectroscopy is desired, the sample should be dispersed or in the form of a thin layer. Optical absorption me…Read more
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60In addition to that, the presence of particles prevents the selective reaction of internal nanotubes, and this issue of purity confuses nanotubes based on their size, type, or use as macromolecular species. Absorption spectroscopy (NIR-Vis-UV) can be used to check the population of the sample or the degree of grouping of the sample. If how to distribute nanotubes by NIR-Vis-UV absorption spectroscopy is desired, the sample should be dispersed or in the form of a thin layer. Optical absorption me…Read more
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99Production of nano supercapacitors using nanoparticles that can be polarized so that electrical energy can be stored. Nanostructure multilayer technology (solid state) is a known dielectric material used in nano supercapacitors because it is a piezoelectric and ferroelectric material. In this work, by creating passive filters, they provide storage between different types of these electric nano layers. The degree of electrical properties in solid materials (nanosupercapacitors) is very diverse. B…Read more
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78Micro and nano-electromechanical systems ( MEMS / NEMS ) are devices in which the physical motion of a micro or nano-scale structure is controlled by an electronic circuit or vice versa. MEMS and NEMS can be used to build sensitive sensors and stable timing devices. Nano System is a function at the molecular scale. This includes both current work and more advanced concepts. In its core meaning, nanotechnology refers to the predicted ability to make items from the bottom up, using techniques and …Read more
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72Nanowires are less than 100 nm in diameter and can be as small as 3 nm. Typically, nanowires are more than 1000 times larger than their diameter. This huge difference in length-to-diameter ratio compared to nanowires is often referred to as 1D materials. This leads to unique properties not seen in bulk materials, The minute size of nanowires means that the quantum mechanical effects of are of great importance. "Quantum Wires" They use quantum mechanics to produce wires with a wide range of uniqu…Read more
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74Electron beam lithography provides the possibility of precise control of nanostructure characteristics that form the basis of various nanotechnologies. The nanostructure fabrication and measurement group advances lithography precision at the nanometer scale and creates processes for manufacturing innovative devices and standards in physical fields ranging from photonics to fluids.< /span>Such measurements create a positive feedback loop for the fabrication and measurement of nanostructures.Elect…Read more
Afshin Rashid
Islamic Azad University Science and Reserch Branch Tehran
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Islamic Azad University Science and Reserch Branch TehranAssistant Professor
Areas of Specialization
Other Academic Areas |
Areas of Interest
Other Academic Areas |