from Part F - Optical microscopy
Published online by Cambridge University Press: 05 November 2012
Historical review and introduction to biological problems
1986
A. Ashkin and coworkers proposed the idea of an optical trap (tweezers). An optical trap can be produced with a highly focused laser light, and can be used to grab, move and apply measurable forces on micrometre-sized objects, such as dielectric microspheres. A microsphere that is chemically coupled to a molecule of interest provides a means of measuring the molecule's position and the force that it exerts.
1992
K. Bustamante and coworkers pioneered direct mechanical measurements of the elasticity of single DNA molecules using magnetic trapping. In 1994 S. Chu and coworkers studied the relaxation properties of single DNA molecules using optical trapping and G. Li and colleagues made a direct measurement of the force between complementary strands of DNA with atomic force microscopy. Mechanical properties of individual strands and doubled-stranded DNA have been determined. In 1997 G. Shivashankar and A. Libchaber developed a new technique for single DNA molecule grafting and manipulation using combined atomic force microscopy and an optical tweezer. These studies opened up new possibilities in biosensors and bioelectronic devices.
1993
K. Svoboda and coworkers applied optical trapping nanometry (optical tweezers in conjunction with nanometre-precision position detection schemes) to study a single kinesin molecule.
To save this book to your Kindle, first ensure [email protected] is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
Find out more about the Kindle Personal Document Service.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Dropbox.
To save content items to your account, please confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account. Find out more about saving content to Google Drive.