Experimental Investigation of Optimal Adhesion of Mushroomlike Elastomer Microfibrillar Adhesives

Langmuir : the ACS Journal of Surfaces and Colloids
Hamidreza MarviMetin Sitti

Abstract

Optimal fiber designs for the maximal pull-off force have been indispensable for increasing the attachment performance of recently introduced gecko-inspired reversible micro/nanofibrillar adhesives. There are several theoretical studies on such optimal designs; however, due to the lack of three-dimensional (3D) fabrication techniques that can fabricate such optimal designs in 3D, there have not been many experimental investigations on this challenge. In this study, we benefitted from recent advances in two-photon lithography techniques to fabricate mushroomlike polyurethane elastomer fibers with different aspect ratios of tip to stalk diameter (β) and tip wedge angles (θ) to investigate the effect of these two parameters on the pull-off force. We found similar trends to those predicted theoretically. We found that β has an impact on the slope of the force-displacement curve while both β and θ play a role in the stress distribution and crack propagation. We found that these effects are coupled and the optimal set of parameters also depends on the fiber material. This is the first experimental verification of such optimal designs proposed for mushroomlike microfibers. This experimental approach could be used to evaluate a wide ra...Continue Reading

References

Jun 23, 2000·Nature·K AutumnR J Full
May 31, 2003·Nature Materials·A K GeimS Yu Shapoval
Sep 10, 2003·Proceedings of the National Academy of Sciences of the United States of America·Eduard ArztRalph Spolenak
May 19, 2004·Proceedings of the National Academy of Sciences of the United States of America·Huajian Gao, Haimin Yao
Apr 6, 2006·Proceedings of the National Academy of Sciences of the United States of America·Peter H TsangJay X Tang
Jul 20, 2006·Journal of the Royal Society, Interface·Tian TangNicholas J Glassmaker
Jun 22, 2007·Proceedings of the National Academy of Sciences of the United States of America·Nicholas J GlassmakerManoj K Chaudhury
Aug 29, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Aránzazu del CampoEduard Arzt
Feb 22, 2008·Proceedings of the National Academy of Sciences of the United States of America·Alborz MahdaviJeffrey M Karp
Jul 16, 2008·Acta Biomaterialia·A V SpuskanyukE Arzt
Jan 14, 2011·Journal of the Royal Society, Interface·Burak AksakMetin Sitti
Jul 29, 2011·Advanced Materials·Moon Kyu KwakKahp Y Suh
Mar 3, 2012·Small·Giuseppe Carbone, Elena Pierro
Jun 4, 2014·Advanced Materials·Sukho Song, Metin Sitti
Jul 6, 2014·Beilstein Journal of Nanotechnology·Burak AksakMetin Sitti

❮ Previous
Next ❯

Citations

Oct 16, 2016·ACS Applied Materials & Interfaces·Prashant PendyalaEui-Sung Yoon
Mar 22, 2019·Integrative and Comparative Biology·D-M DrotlefM Sitti
May 11, 2019·Bioinspiration & Biomimetics·Aiva Simaite, Matthew Spenko
Apr 3, 2020·Advanced Materials·Ville LiimatainenMetin Sitti
May 12, 2017·Journal of the Royal Society, Interface·Gaurav AmarpuriAli Dhinojwala
May 17, 2017·Proceedings of the National Academy of Sciences of the United States of America·Sukho SongMetin Sitti
May 7, 2020·ACS Applied Materials & Interfaces·Yongtae KimSeunghwa Ryu

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.