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NanoGridsTM TEM grids set a new standard for reproducible, repeatable and accurate metrology of nanoparticles and other nanomaterials using TEM, SEM, AFM, EPMA, XPS, TOF-SIMS, fluorescence microscopy, and IR/Raman spectroscopy.
NanoGrids eliminate artifacts from sample preparation such as agglomeration and drying effects which improves data quality and saves valuable time for data collection and analysis. NanoGrids aid in TEM sample preparation for nanoparticle slurries, solutions, suspensions, aerosols, dry powders, and thin film coatings of nanomaterials by matching the functionalized surface of NanoGrids to the material of interest.
NanoGridsTM are currently available with three different membrane types (SiO2, Si3N4, and carbon) and a range of active surfaces to enable uniform dispersion of nearly any material. The robust physical, chemical, and thermal properties of our Si-based NanoGrids enable multistep processing and correlative characterization. Our C-SMART functionalized carbon TEM grids now offer the same benefits as our Si-based grids but in a familiar form factor (carbon membranes on Cu mesh) for seamless integration into your existing workflows.
For more information about techniques for TEM sample preparation using NanoGrids TEM grids including a step-by-step protocol for dissolved/suspended nanoparticles, please view our TEM sample preparation video or contact us.
NanoGrids can be used in a wide range of applications to determine:
- Particle size and size distribution
- Particle shape
- Particle orientation
- Surface chemistry
- Particle composition
- Particle density for coatings
- Film orientation
- Self-assembly properties
- Temperature-time transformations
Dune Sciences offers six different NanoGridsTM configurations to meet a broad range of materials including metals, oxides, soft materials (polymers), quantum dots, and carbonaceous materials.
Hydrophilic, non-functionalized SiO2 or Si3N4 membrane grid. Stable to 1000°C. Examples: vapor deposition, slurries, non-specific deposition.
Hydrophilic grids with a positive surface charge that show strong affinity for negatively charged materials. SiO2, Si3N4, or carbon membranes. Examples: Metal Citrate NPs, activated carbon, asbestos, oxide NPs
Hydrophilic grids with a negative surface charge that show a strong affinity for positive charge on particles. SiO2, Si3N4, or carbon membranes. Examples: Lysine-coated particles, quaternary amine surfaces.
Includes three (3) each of NanoBasic, NanoPlus, and NanoMinus Grids.
Hydrophilic grids with PEG surface to promote hydrogen bonding. SiO2, Si3N4, or carbon membranes. Examples: dextran-coated Fe2O3, PEGylated Nanoparticles.
Grids functionalized with hydrophobic coating for use with organic solvents. SiO2, Si3N4, or carbon membranes.
Examples: Carbon nanotubes, quantum dots, alkane-thiol functionalized gold, FIB lamellae.
NanoGridsTM packaged with bifunctional linkers to covalently attach functionalized nanoparticles to grid surface.
Dune Sciences can produce custom grid surfaces and configurations to meet individual needs.