StudentShare solutions
Triangle menu

Atomic force microscopy - Lab Report Example

Nobody downloaded yet

Extract of sample
Atomic force microscopy

The material to be scanned is placed below the tip, as the tip moves across the surface it is attracted or repelled by different forces, the atomic deflection from rest is recorded and an imaging software is used to process the results. The results normally appears as a topographical image of the surface imaged2.
Different imaging techniques are used to picture the surface or for different surface analysis, they include the contact mode, non-contact mode and tapping mode. With assistance from specialized software, Atomic Force Microscope can be used to measure characteristics of material surface that other types of microscope cannot image.
This method is whereby the tip gets into contact with the surface being scanned, it is the most common mode used in atomic force scanning. The tip have a repulsive force coefficient of 9N. As the tip moves over the surface, the deflection of the cantilever generated is fed to a DC amplifier system, which verifies it and tries to much it with the desired. If the magnitude of deflections is different from the required one, the feedback amplifier system increases the voltage supply to the piezoelectric positioning system to raise or lower the material surface relative to the tip until the desired voltage is achieved3. The measure of voltage supplied to the piezoelectric positioning system gives the degree of roughness and surface features of the material. This is displayed laterally to the position of the sample.
The main problem with the contact mode is the application disproportionate force to the sample by the probe leading destruction of the sample surface; this can be minimized by reducing the amount of force applied by the probe. However, there are limits to the minimum force that the operator can apply during scanning in ambient conditions.
Ambient conditions possess some challenges to AFS since a thin layer of about 30 monolayers made up of ...Show more

Summary

It enables one to view a material with good precision ranging between 100 micrometre and 1 micrometre.
The instrument operates by allowing an…
Author : carter66
Save Your Time for More Important Things
Let us write or edit the lab report on your topic
"Atomic force microscopy"
with a personal 20% discount.
Grab the best paper

Check these samples - they also fit your topic

Application of Microscopy in Biomedical Sciences
Fluorescence emission in the fluorescence microscopy is not only characterized by the position and intensity but also the wavelength, lifetime and polarization. Use of fluorescence imaging has made it easier the observation of photo physical events. Rotation and mobility of the fluorescence is measured through the TR-FAIM as “Time-resolved fluorescence anisotropy imaging”.
6 pages (1500 words) Lab Report
Immuno-labelling, fluorescence microscopy and live time-lapse imaging
The detection of the antibody reaction with the specific antigens is examined and all the physiological process behind it. The experimentation processes of immune-imaging of the cells on the photon of the fluorescent microscopy are also explored in the paper.
8 pages (2000 words) Lab Report
Atomic Spectra
Now the spectrum of these wavelengths (radiations) when observe against the dark back ground gives us the line emission spectra (line spectra occurs when some particular
1 pages (250 words) Lab Report
Atomic Weight of Magnesium
In this experiment, the validity of balanced equations was demonstrated by accurately predicting the molecular weight of Magnesium, supposedly a constant
1 pages (250 words) Lab Report
Measuring density of an irregular object
From the microscopic point of view, any material usually has a specific arrangement of its atoms. The bonding between the atoms determines the
4 pages (1000 words) Lab Report
Application of Microscopy in Biomedical Sciences
Use of fluorescence imaging has made it easier the observation of photo physical events. Rotation and mobility of the fluorescence
6 pages (1500 words) Lab Report
Atomic absorption emission
In such a case, the molecular bands, atomic or ionic lines are emitted by excited molecules, atoms or ions. In this case, Na+ ions in the solution are able to produce color
5 pages (1250 words) Lab Report
How do the cells of a growing plant know in which directions to elongate
The plant cells are surrounded by a flexible and tough layer of cellulose and molecules that are collectively known as the cell wall. Cell walls help in counteracting osmotic pressures
3 pages (750 words) Lab Report
Centripetal Force
This force is called radial force or centripetal force, since it acts along the orbit’s radius. According to Newton’s Second Law of motion, this force makes the object to accelerate. Before the experiment is conducted,
3 pages (750 words) Lab Report
Electromagnetic: Force on Conductors in Magnetic Fields
Magnetic force acting on a current can be established by adding the magnetic force acting on each charge that contributes to the current. When an electric wire is exposed to a magnet, the current being carried in the wire will be affected by a magnetic field. The consequence often comes in form a force.
4 pages (1000 words) Lab Report
Hire a pro to write
a paper under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Your email
YOUR PRIZE:
Apply my DISCOUNT
Comments (0)
Click to create a comment
Contact Us