AFM height image of Co nanoparticles (bar is 800nm) |
MFM image of Co nanoparticles shown at left shows different magnetic domains (bar is 800nm) |
close-up AFM height image of Co nanoparticles (bar is 200nm) |
close-up MFM image of Co nanoparticles shown at left (bar is 200nm) |
Large Z-Range AFM Imaging A) 55x55 µm AFM image of razor blade with 57.2 µm Z range B) 25x25 µm zoom-in AFM image around the razor blade apex C) 3D presentation shows the sharp apex with height of 50.68 µm |
Ideal systems for large Z scans:
A) AFM Topographic image of Silver Nanoparticles
B) Zoom-in AFM image of the blue square marked in A
AFM scan (53.2x53.2 µm) of textile fibers with tens of microns of Z range (29.19 µm)
2D (Left) and 3D (Right) AFM topographic images are presented above.
Nano-textile technology deals with nanometric domains (e.g. nano particle coatings) laying on micrometric fibers. Topographic imaging of such nanometric domains is challenging within the large Z topographies of the textile fibers.
The MultiViewTM SPM series efficiently addresses this challenge with its dynamic Z range. The Nanonics 3D FlatScanTM attains a Z range of 100 µm, and can achieve even up to 200 µm in tip/sample-scanning combined modes.
Zooming AFM images (3D presentation) for locating nanometric features on micrometric textile fiber.
Integrated SEM and AFM Imaging
SEM images of a Nanonics AFM Non-obscuring Probe |
Probe in contact with a sample inside the vacuum chamber of the SEM. |
The Scanning Electron Microscope (SEM) has difficulty obtaining information on a variety of samples. One such situation is the case of a trench in a semiconductor wafer in which a SEM cannot view the bottom or the sidewall of the trench structure.
Using the unique AFM capabilities of the MultiView 400™ The operator of a SEM or FIB machine can ask, on line, questions about high aspect ratio structures (eg. side wall angles and the surface structure of these sidewall in a variety of important devices with vias and other structures. |
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Imaging a deep trench such as the one opposite is impossible with standard silicon AFM tips. The Nanonics deep trench probes together with the large scan range of the 3D FlatScan™ makes these images possible for the first time. |
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The bottom of a deep trench | ||||||
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Side wall image | ||||||
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AFM topographic image of nanometric CdSe quantum dots dispersed on H2 treated gold substrate
Ideal systems for this application:
Near-field optics can employ many different probes. One such probe is a silicon cantilever with an aperture and this probe which can be used with Nanonics Systems can be purchased from Nascatec [http://www.nascatec.com/].
Although all Nanonics platforms allow for the use of such a probe, these probes do not exhibit the exposed probe tip geometry of glass probes and do not emulate the guiding of light that is inherent in an optical fiber.
A prerequisite for producing light at the tip of such silicon based NSOM apertures is the ability to bring a lens in close proximity to the back side of the probe and this is of course possible with Nanonics platforms. However, large fluences of light from the lens of the microscope are needed to illuminate the aperture. This results in a large amount of scattering and a reduction in the signal to noise. Because there is no exposed probe geometry in these probes an on-line separate illumination or collection channel with the lens of the optical microscope is not possible, since the microscope lens is dedicated to illuminate the aperture. As a result reflection imaging becomes difficult, and the lack of light guiding abilities does not permit scanning the probe such as in collection mode imaging.
Topographic Image 4 x 4 microns |
Topographic Image 1.2 x 1.2 microns |
3D Representation of the Topographic Images
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Figure 1:
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Figure 2:
A) AFM 3D (60x60 microns) presentation of the FIB etched feature shows a deep trench imaged with AFM Nanonics’ glass probe.
B) 2D AFM image show a line crossing the trench for line profiling.
C) Topography line profile (presented in B) showing large Z height of ~30 microns.
WSxM software has been used for image processing of the pictures above: I. Horcas et al. Rev. Sci. Instrum. 78, 013705 (2007)
What technique are you looking for? We're confident we have a solution for you.
Or simply contact us and one of our applied scientists will help guide you to the right product for your research or industry:
Yes, I'd like to discuss Apertureless NSOM with an application scientist
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