Micrographia, or, Some physiological descriptions of minute bodies made by magnifying glasses :with observations and inquiries thereupon /by R. Hooke ...

Hooke, Robert

doi:10.5962/bhl.title.904

Cited by 449 publications

(183 citation statements)

References 0 publications

Supporting

Mentioning

170

Contrasting

Unclassified

Order By: Relevance

“…Insect adhesive organs -either smooth, soft pads or arrays of adhesive setae -have attracted the interest of scientists for more than three centuries (Hooke, 1665;Blackwall, 1830;West, 1862;Dewitz, 1884;Gorb, 1998;Niederegger et al, 2002). Owing to their structural diversity and striking mechanical performance (Beutel and Gorb, 2001), numerous experimental studies have been conducted to understand the functional principles behind specific morphological features.…”

Section: Introductionmentioning

confidence: 99%

Evaporation dynamics of tarsal liquid footprints in flies (Calliphora vicina)and beetles (Coccinella septempunctata)

Peisker

Gorb

2012

Journal of Experimental Biology

View full text Add to dashboard Cite

SUMMARYInsect tarsal adhesive structures secrete a thin layer of fluid into the contact area. It was previously reported that the presence of this fluid significantly increases adhesion on various substrata. Previous data obtained from representatives of different insect groups suggest a difference not only in the chemical composition of the fluid, but also in its physical properties. In the present study, we have measured for the first time changes in the droplet geometry over time and the evaporation rate of the fluid in flies (Calliphora vicina) and beetles (Coccinella septempunctata) by the use of atomic force microscopy. Flattened droplets of the beetle had lower evaporation rates than hemispherical footprints of the fly. Within 1h, the droplet volume reduced to 21% of the initial volume for the fly, and to 65% for the beetle, suggesting a larger fraction of volatile compounds in the fly fluid. It was revealed that drop geometry changes significantly during evaporation and shows pinning effects for the fly footprints due to an assumed self-organizing oil layer on top of the water fraction of the micro-emulsion. The data obtained suggest that the adhesion strength in capillarity-based switchable adhesive systems must be time-dependent because of the specific evaporation rate of the adhesive fluid. These results are important for our understanding of the functional mechanism of insect adhesive systems and also for biomimetics of artificial capillarity-based adhesive systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Evaporation dynamics of tarsal liquid footprints in flies (Calliphora vicina)and beetles (Coccinella septempunctata)

Peisker

Gorb

2012

Journal of Experimental Biology

View full text Add to dashboard Cite

show abstract

“…Structural colour, which is produced by the interaction of light with transparent microstructures, has been identified in the scientific literature since 1665 (Hooke 1665;Newton 1730). It has been shown to occur both widely in current species as well as in the fossil record (Vukusic & Sambles 2003;Parker 2005).…”

Section: Introductionmentioning

confidence: 99%

Exaggeration and suppression of iridescence: the evolution of two-dimensional butterfly structural colours

Wickham

Large

Poladian

et al. 2005

J. R. Soc. Interface.

View full text Add to dashboard Cite

Many butterfly species possess 'structural' colour, where colour is due to optical microstructures found in the wing scales. A number of such structures have been identified in butterfly scales, including three variations on a simple multi-layer structure. In this study, we optically characterize examples of all three types of multi-layer structure, as found in 10 species. The optical mechanism of the suppression and exaggeration of the angle-dependent optical properties (iridescence) of these structures is described. In addition, we consider the phylogeny of the butterflies, and are thus able to relate the optical properties of the structures to their evolutionary development. By applying two different types of analysis, the mechanism of adaptation is addressed. A simple parsimony analysis, in which all evolutionary changes are given an equal weighting, suggests convergent evolution of one structure. A Dollo parsimony analysis, in which the evolutionary 'cost' of losing a structure is less than that of gaining it, implies that 'latent' structures can be reused.

show abstract

“…Christiaan Huygens invented the first achromatically corrected eyepiece, known as the "Huygens ocular", in the late 17th century [15]. Robert Hooke became the first to construct a microscope with a built-in illumination source in 1655 [16]. His device closely resembled the familiar optical microscopes of today.…”

Section: History Of Optical Microscopymentioning

confidence: 99%

Development of a Hybrid Atomic Force and Scanning Magneto-Optic Kerr Effect Microscope for Investigation of Magnetic Domains

Lawrence¹

2000

View full text Add to dashboard Cite

We present the development of a far-field magneto-optical Kerr effect microscope.An inverted optical microscope was constructed to accommodate Kerr imaging and atomic force microscopy. In Kerr microscopy, magnetic structure is investigated by measuring the polarization rotation of light reflected from a sample in the presence of a magnetic field. Atomic force microscopy makes use of a probe which is scanned over a sample surface to map the topography. The design was created virtually in SolidWorks, a three-dimensional computer-aided drafting environment, to ensure compatibility and function of the various components, both commercial and custommachined, required for the operation of this instrument. The various aspects of the microscope are controlled by custom circuitry and a field programmable gate array data acquisition card at the direction of the control code written in National Instrument LabVIEW. The microscope has proven effective for both Kerr and atomic force microscopy. Kerr images are presented which reveal the bit structure of magnetooptical disks, as are atomic force micrographs of an AFM calibration grid. Also discussed is the future direction of this project, which entails improving the resolution of the instrument beyond the diffraction limit through near-field optical techniques.Preliminary work on fiber probe designs is presented along with probe fabrication work and the system modifications necessary to utilize such probes.i Acknowledgments I wish to thank the members of the Sánchez Nano-Development Lab in the physics department of Portland State University. This work could not have been successful without their continued advice and support. These include undergraduate research students

show abstract

Micrographia, or, Some physiological descriptions of minute bodies made by magnifying glasses :with observations and inquiries thereupon /by R. Hooke ...

Cited by 449 publications

References 0 publications

Evaporation dynamics of tarsal liquid footprints in flies (Calliphora vicina)and beetles (Coccinella septempunctata)

Evaporation dynamics of tarsal liquid footprints in flies (Calliphora vicina)and beetles (Coccinella septempunctata)

Exaggeration and suppression of iridescence: the evolution of two-dimensional butterfly structural colours

Development of a Hybrid Atomic Force and Scanning Magneto-Optic Kerr Effect Microscope for Investigation of Magnetic Domains

Contact Info

Product

Resources

About