Why is TIRF suitable for imaging single-molecule?

The visualization of single-molecule fluorescence with sufficient temporal resolution for dynamic studies is possible with TIRFM because of the outstanding signal-to-noise ratio afforded by the evanescent wave excitation.

What is single-molecule fluorescence spectroscopy?

Single-molecule fluorescence spectroscopy is currently the most commonly used single-molecule technique. The basis of single-molecule fluorescence microscopy is the labeling of the molecules of interest with a fluorophore and observing it in an optical microscope.

Is TIRF super resolution?

We applied instant TIRF-SIM to multiple live samples and achieved rapid, high-contrast super-resolution imaging close to the coverslip surface.

What is TIRF microscopy used for?

TIRF microscopy is an excellent technique for combining kinetic studies with spatial information in live samples or even in vitro. It is routinely used for investigating molecule trafficking as it occurs e.g. in cytoskeleton assembly.

How does a TIRF microscope work?

It allows imaging of fluorescent molecules located close to the glass/water (or glass/specimen) interface. This is achieved by employing an evanescent wave for excitation of the fluorophores instead of direct illumination via light delivered by an arc lamp, LEDs or lasers.

What is single molecule detection?

Single molecule detection is a way to study detailed physical and chemical properties that allows for scrutiny of fundamental principles and mechanisms, and may lead to technological and methodological developments. Single molecule techniques also have key potential in material development.

Which is a evanescent wave super resolution microscopy technique?

TIRF microscopy (also known as evanescent wave microscopy) is based on classical widefield microscopy, where fluorophores near the coverslip (and therefore near the cell surface) are selectively excited whilst fluorescence further away from the coverslip is minimised.

What is the resolution of TIRF microscopy?

TIRF microscopy delivers images with an outstandingly high axial resolution below 100 nm. This allows the observation of membrane-associated processes.

Why single molecule is important?

Single molecule methods can provide detailed information about molecular mechanisms and interactions, complementing bulk assays with additional information that is often difficult or impossible to observe using traditional methods.

Why is TIRFM used for single molecule detection?

TIRFM allows for selective excitation of the surface-bound fluorophores, while non-bound molecules are not excited and do not fluoresce. Due to the fact of sub-micron surface selectivity, TIRFM has become a method of choice for single molecule detection. There are many applications of TIRFM in cellular microscopy.

What is a TIRFM microscope?

A total internal reflection fluorescence microscope ( TIRFM) is a type of microscope with which a thin region of a specimen, usually less than 200 nanometers can be observed . TIRFM is an imaging modality which uses the excitation of fluorescent cells in a thin optical specimen section that is supported on a glass slide.

What is TIRF used for in biology?

The selective visualization of the plasma membrane renders the features and events on the plasma membrane in living cells with high axial resolution . TIRF can also be used to observe the fluorescence of a single molecule, making it an important tool of biophysics and quantitative biology.

What is total internal reflection fluorescence microscopy (TIRFM)?

DOI: 10.1101/pdb.top73 Abstract Total internal reflection fluorescence microscopy (TIRFM) allows fluorescent molecules to be visualized with an unparalleled signal-to-noise ratio.