HORTICULTURE SCIENCE
APPLICATION OF NANO TECHNOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a nanoscale sharp needle to tunnel through samples and the hardness gives the image
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a nanoscale sharp needed to scan over the surface of samples and the deflection of the needle gives the image
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a nanoscale sharp needle to thread through the sample
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a laser beam to scan across the surface of the object and record reflection data
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Detailed explanation-1: -The scanning tunneling microscope (STM) is widely used in both industrial and fundamental research to obtain atomic-scale images of metal surfaces.
Detailed explanation-2: -Because STM is based on measuring the current between the tip and the sample, STM can only analyze conductor and semiconductor samples.
Detailed explanation-3: -The atomic force microscope (AFM) and the scanning tunneling microscope (STM) are essential in the study of nanotechnology. These powerful tools allow scientists and engineers to see and manipulate individual atoms. AFMs use a very small probe-a cantilever with a tiny tip-to scan a nanostructure.
Detailed explanation-4: -Scanning tunneling microscopy (STM) and scanning tunneling spectroscopy (STS) are the most powerful techniques for revealing the topographic structures of the surfaces [46, 47]. These techniques are also can be used to measure defects on or slightly below surfaces.