In many cases where nanoparticles intend to agglomerate, it will be very challenging to determine the size by looking for grain boundaries within agglomerations. No matter how straightforward and powerful TEM is, I find it sometimes not reliable. I will personally seek more information from pair distribution function and/or small-angle scattering to validate the TEM result. These two techniques are not invasive (some materials are beam sensitive to use TEM, and transferring samples to vacuum chamber might cause air contamination), but are less convenient than TEM since both of them are synchrotron based techniques.
In many cases where nanoparticles intend to agglomerate, it will be very challenging to determine the size by looking for grain boundaries within agglomerations. No matter how straightforward and powerful TEM is, I find it sometimes not reliable. I will personally seek more information from pair distribution function and/or small-angle scattering to validate the TEM result. These two techniques are not invasive (some materials are beam sensitive to use TEM, and transferring samples to vacuum chamber might cause air contamination), but are less convenient than TEM since both of them are synchrotron based techniques.
Rumana Bukht Depends what you define as a particle (or a wave form) and sub-atomic...
Rumana Bukht Depends what you define as a particle (or a wave form) and sub-atomic...
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Can Nano particles be sub atomic?
Can Nano particles be sub atomic?
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In many cases where nanoparticles intend to agglomerate, it will be very challenging to determine the size by looking for grain boundaries within agglomerations. No matter how straightforward and powerful TEM is, I find it sometimes not reliable.
I will personally seek more information from pair distribution function and/or small-angle scattering to validate the TEM result. These two techniques are not invasive (some materials are beam sensitive to use TEM, and transferring samples to vacuum chamber might cause air contamination), but are less convenient than TEM since both of them are synchrotron based techniques.
In many cases where nanoparticles intend to agglomerate, it will be very challenging to determine the size by looking for grain boundaries within agglomerations. No matter how straightforward and powerful TEM is, I find it sometimes not reliable.
I will personally seek more information from pair distribution function and/or small-angle scattering to validate the TEM result. These two techniques are not invasive (some materials are beam sensitive to use TEM, and transferring samples to vacuum chamber might cause air contamination), but are less convenient than TEM since both of them are synchrotron based techniques.
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we can do smaller Nano particles size 1 to 100nm by using Small Angle X-ray Scattering
we can do smaller Nano particles size 1 to 100nm by using Small Angle X-ray Scattering
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Probably, Scanning Tunneling Microscopy, if the cluster mobility on the surface is not high.
Probably, Scanning Tunneling Microscopy, if the cluster mobility on the surface is not high.
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The atomic sizes are in the angstrom (~1X10E-1 nm) scale
The nanopartciles are in the 1-100 nm scale
in between there are particles you are asking about. Normally in the form of small clusters of atoms or so.
The atomic sizes are in the angstrom (~1X10E-1 nm) scale
The nanopartciles are in the 1-100 nm scale
in between there are particles you are asking about. Normally in the form of small clusters of atoms or so.
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You can use AFM to see and manipulate individual atoms.
You can use AFM to see and manipulate individual atoms.
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Probably not because atom exists in angstrom size.
Probably not because atom exists in angstrom size.
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in HAADF STEM mode of a Cs corrected machine you can image single atoms, see for instance the movie of Bert Freitag:
https://www.researchgate.net/post/Are_Angstrom_size_particles_visible_through_a_transmission_electron_microscope
in HAADF STEM mode of a Cs corrected machine you can image single atoms, see for instance the movie of Bert Freitag:
https://www.researchgate.net/post/Are_Angstrom_size_particles_visible_through_a_transmission_electron_microscope
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The smallest nanoparticle can be up to 1 nm.TEM is the best way.
The smallest nanoparticle can be up to 1 nm.TEM is the best way.
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