Substrates used to Fabricate Nanostructures

university wafer substrates

What Substrates do Researchers Use to Fabricate Nanostructures

University reseachers have used the following substrate to fabricate nanostructures:

We are working on nanostructures made of silicon. Usually, the thickness of silicon film ranges from 300nm to 700nm in our research. The substrate can be SiO2 or other transparent insulators. Do you think it is possible to provide silicon film at this thickness range? If yes, may I know the parameters of your silicon, such as refractive index (n, k)? We will use SOI to fabricate nanostructures by electron beam lithography. The SOI should be transparent. The absorption of Si should be as small ad possible.

Reference #205719 for specs and pricing.

I will used as p-GaN / n-ZnO (nanostructures) heterojunction  based light emitting diode.I will let you know how it work.

Reference #38046 for specs/pricing

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3 Inch Silicon Wafer Used in Nanostructure Research

A postdoc client requested a quote for the following:

Our group previous postdoc used to order Si wafers from your company.  Could you please give us a quotation for the silicon wafers with the following details.  I'm using these wafers for nanostructure fabrication (magnetic nanowire, rings etc.) using E-beam lithography.

Wafer Details: Part Number (447)

Resistivity: 0 -100 Ohm-Cm
Surface: 1 side polished
Orientation <100>
Thickness: 406-480 microns.

Reference #211263 for specs/pricing.

Nanostructures to Improve Solar Panel Solar Absorption

A university research group requested the following specs:

My research group is working on a project aimed at improving broadband absorption in thin film solar cells using aperiodic nanostructures deposited on their surface. In order to avoid actually fabricating solar cells ourselves, we have been wondering if it is possible to find solar cells without any electrodes or AR coating so we can build our nanostructures on top of them. Would you be able to supply us with such wafers? We would need wafers that are a 40-50mm in diameter. I'm not sure I'm the So we would get about a dozen to start with, and will get more as our research progresses. I'd appreciate it if you could provide me with quote to take to my advisor. We're hoping to move on this as quickly as possible. quantity at the moment but I can update you on that later today. I take it that you can indeed provide us with solar wafers with no electrodes or coating then?

UniversityWafer, Inc. Replied

We have: Solar cells are made in the following steps:

  1. One starts with an "As-sliced by wire-saw" silicon wafer Si:B[100] (0.5-5.0)Ohmcm. Typically such wafers are pseudo-square 156×156mm × 200µm.
  2. By Chemical Diffusion one creates an n-type layer, perhaps 10µm thick
  3. One deposits metal electrodes on the back and transparent electrodes on the front.
  4. 4. One passivates the front surface with an anti-reflection coating.

Reference #224157  for more specs and pricing.

What are Nanostructures?

Nanostructures are structures with dimensions in the nanometer scale, typically ranging from 1 to 100 nanometers. These structures have unique physical, chemical, and electronic properties that differ from those of bulk materials. Nanostructures can be made from a variety of materials, including metals, semiconductors, polymers, and biological materials. They are widely studied for their potential applications in fields such as electronics, energy, medicine, and materials science.

Examples of nanostructures include:

  1. Nanoparticles: Nanoparticles are microscopic particles with at least one dimension measuring less than 100 nanometers. They have unique properties due to their small size, which result from the high surface-to-volume ratio and quantum confinement effects. Nanoparticles have a variety of applications in fields such as electronics, medicine, energy, and materials science.
  2. Nanotubes: Nanotubes are a type of nanostructure, having the shape of a tube with diameter on the nanometer scale (typically 1-100 nm). They can be single-walled (SWCNTs) or multi-walled (MWCNTs), and are typically made of carbon. Nanotubes have unique mechanical, electrical, and thermal properties due to their tubular structure and the arrangement of their atoms. They have potential applications in areas such as electronics, energy storage, and biomedical engineering.
  3. Nanowires: Nanowires are nanoscale cylindrical structures with a diameter on the order of a few nanometers to several hundred nanometers, and a length that can be several micrometers to millimeters. They can be made of various materials, such as metals, semiconductors, and insulators. Nanowires have unique properties due to their small size, such as high surface-to-volume ratio and quantum confinement effects, that make them useful for a range of applications in electronics, energy, and biomedicine. For example, nanowires can be used as electrical conductors, transistors, and battery electrodes.
  4. Nanoporous materials: Nanoporous materials are materials with pores or voids on the nanometer scale (typically 1-100 nm). These pores can be uniform in size or have a controlled distribution of pore sizes. Nanoporous materials have a high surface-to-volume ratio, which makes them useful for various applications such as catalysis, separations, energy storage, and drug delivery. Some examples of nanoporous materials include zeolites, metal-organic frameworks (MOFs), and silica aerogels. The pore structure and size can be tailored to meet specific requirements, making nanoporous materials versatile and useful in a wide range of applications.
  5. Nanocomposites: Nanocomposites are materials that consist of a matrix and nanoscale fillers (typically 1-100 nm) dispersed within it. The nanoscale fillers can be made of various materials, such as nanoparticles, nanotubes, and nanofibers, and can greatly enhance the properties of the matrix material. The small size of the fillers results in a large surface area, which can improve the mechanical, thermal, electrical, and optical properties of the nanocomposite. Nanocomposites have a wide range of applications, including in materials science, electronics, energy, and biomedicine. For example, they can be used as stronger and lighter materials, as catalysts, and as drug delivery systems.
  6. Nanolaminates: Nanolaminates are multi-layer materials that consist of alternating thin layers of different materials on the nanometer scale (typically 1-100 nm). The individual layers can be made of various materials, such as metals, ceramics, and polymers, and the combination of different materials results in new properties and functions. The properties of nanolaminates can be tailored by controlling the composition and thickness of each layer, making them useful for a wide range of applications. Nanolaminates are used in areas such as electronics, energy, and materials science, for example, as high-strength and high-temperature materials, as catalysts, and as protective coatings.
  7. Nanograins: Nanograins are small grains or particles on the nanometer scale (typically 1-100 nm) that can form in materials. They can occur naturally or be produced artificially through processes such as ball milling, electron beam irradiation, or laser ablation. Nanograins have unique properties compared to larger grains, such as improved mechanical, thermal, and electrical properties, due to their high surface-to-volume ratio and quantum confinement effects. Nanograins have a wide range of applications in fields such as materials science, electronics, and energy. For example, they can be used as high-strength materials, as catalysts, and as battery electrodes.
  8. Nanofibers: Nanofibers are ultra-thin fibers with a diameter on the nanometer scale (typically 1-100 nm). They can be made from various materials such as polymers, ceramics, and metals, and can be produced using techniques such as electrospinning, template-assisted synthesis, and self-assembling. Nanofibers have a high surface-to-volume ratio, which gives them unique properties, such as high mechanical strength, high thermal stability, and high porosity. They have a wide range of applications in fields such as materials science, electronics, energy, and biomedicine. For example, they can be used as high-strength and high-temperature materials, as filtration membranes, and as drug delivery systems.

The properties of nanostructures are highly dependent on their size, shape, and composition, and they are often synthesized using techniques such as chemical synthesis, physical vapor deposition, and self-assembly. Their unique properties make nanostructures an important area of research, with potential applications in areas such as catalysis, electronics, energy, and biomedicine.