e area is smaller (d) their surface is
Multiple choice questions, please help thank you!!
1. The chemical potential (μ) of smaller size clusters is bigger than that of bigger size clusters because of
(a) their small size
(b) the fewer number of atoms in them
(c) surface area is smaller
(d) their surface is more curved
2. Which of these characteristics would you associate with SEM:
A surface imaging tool
Maintained under vacuum
Provides imaging and compositional data
Uses a scanned electron beam
All of the above
3. Secondary electrons (SE) are best described as
Low energy electrons from the sample surface
High energy electrons from the sample surface
Low energy primary beam electrons
High energy primary beam electrons
4. Atomic force microscopy (AFM) is the most widely used form of scanning probe microscopes for the characterization of nanomaterials since it require:
(a) electrically conductive and optically transparent samples
(b) neither electrically conductive nor optically transparent samples
(c) electrically conductive and optically non-transparent samples
(d) good vacuum
5. The zero- and one- state of a molecular switch can be
(a) oxidized and reduced forms
(b) an acid and its conjugate base
(c) isomers
(d) all of the above
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