What is TIRF microscopy used for?

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.

Is TIRF confocal?

Confocal Microscopy TIRF (Total Internal Reflection Fluorescence Microscopy) is a technique that enables well defined fluorescence images near a surface. This can excite fluorescent dyes and thus can be used to image this layer without exciting any molecules further away from the interface.

How much does a TIRF microscope cost?

Total internal reflection fluorescence (TIRF) microscopy is a method that resolves molecular events specifically at or near the cell surface (see How It Works). Major microscope manufacturers, including Zeiss, Nikon, and Olympus, offer “turnkey” TIRF systems costing upwards of $100,000.

What is the meaning of TIRF?


Acronym Definition
TIRF Total Internal Reflection Fluorescent (microscopy)
TIRF Total Internal Reflectance Fluorimetry (biomedical technology)
TIRF Transmittal/Information Request Form (US NASA)
TIRF The Indian Rafting Foundation

Is TIRF super-resolution?

Fig. 2: Instant TIRF-SIM enables high-speed super-resolution imaging at the plasma membrane over hundreds of time points. a, EMTB–3×EGFP expressed in Jurkat T cells. The image shown was taken from a 500-frame series (images recorded every 50 ms).

How can I get super resolution?

The key to achieving super resolution is the nonlinear dependence of the depleted population on the STED laser intensity when the saturated depletion level is approached: If the local intensity of the STED laser is higher than a certain level, essentially all spontaneous fluorescence emission is suppressed.

What is the resolution of fluorescence microscopy?

Spatio-temporal visualization of cellular structures by fluorescence microscopy has become indispensable in biology. However, the resolution of conventional fluorescence microscopy is limited by diffraction to about 180 nm in the focal plane and to about 500 nm along the optic axis.

How is TIRF used in confocal microscopy?

In confocal microscopy, a pinhole is used to focus the light into a cone and that light is collected from the focal plane and excluded from elsewhere. TIRF is unique as only the area of acquisition is illuminated and collected. Compared to widefield microscopy, TIRF can provide over a 30x increase in S/N .

How is total internal reflection used in TIRFM?

A recently developed high numerical aperture microscope objective lens that improves TIRFM and makes it widely accessible is discussed in this application note. Total internal reflection is an optical phenomenon that can be employed to observe events occuring at boundaries.

Can a correction collar be used in TIRF microscopy?

As many experiments, especially in live cell imaging, are conducted at 37 °C, temperature-induced changes in the refractive index of the immersion medium can occur. To correct for these changes, many TIRF microscopy objectives are equipped with a correction collar.

How is evanescent wave used in TIRF microscopy?

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.

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