The synthesis of the rough particles was built on a previously developed heterocoagulation method, which uses electrostatic effects to add small particles to the surface of large particles: as the particles are negatively charged in water, adding a positively charged molecule to the suspension will make the molecule adsorb to the particle surface and make it positive. By understanding the particle properties, the features can be utilized to engineer more complex geometries, a kind of “nano-lego”. Often, particles can be made of smaller molecules that naturally assemble to smooth spherical structures, which is dictated by surface energy. With this mental image in mind, the next step was to realize these particles in a reproducible manner, make the gel and find the right experiments to prove the hypothesis, that smooth and rough particles will behave different when exposed to shear stresses.Ĭhemistry is a very powerful tool when designing nanoparticles. The thinking was that if the particles would behave similar to a jammed assembly of gears, they would interlock and resist to rolling when exposed to stresses. In this work, the initial idea was to render a gel tougher by introducing surface topography to the building blocks of the gel. These are only a few examples of the “knobs to turn” so we can engineer a gel with targeted properties. By tuning the particle material, shape, topography as well as the suspending media properties, the network properties will change, which in turn also change the macroscopic properties. This material is visco-elastic, meaning that it has liquid-like and solid-like characteristics, where the particle network contributes to the elasticity and the suspending medium contributes to the viscous behavior. The particles then form a spanning network which macroscopically forms a gel. Colloidal gels are formed, when attractive interactions are induced in a suspension of colloidal particles (which typically are in the size range 10 nm - 10 µm in diameter). Material science is at the juncture of chemistry, physics and engineering, and all three disciplines were important when understanding the behavior of rough particle colloidal gels. Of course, all these methods will have their advantages and limitations, which is why they are all needed in order for a complete mental picture to be formed. We need to stitch together the “truth” from the different snapshots that we get using various measurement methods. It wasn’t always the way it is now.Understanding mechanisms arising from phenomena six orders of magnitudes in length scale below what we can see, is challenging. If you indulge your natural curiosity and retain a sense of fun in new experience, I think you’ll find it functions as a sort of shock absorber for the bumpy road ahead (Bumpy Road Quotes) Look at pictures of me growing up. Whoa bumpy road ahead! (Bumpy Road Quotes) A playful mind is inquisitive, and learning is fun. (Bumpy Road Quotes) Do you wanna hop on your cousin’s lap there please. If you indulge your natural curiosity and retain a sense of fun in new experience, I think you’ll find it functions as a sort of shock absorber for the bumpy road ahead. (Bumpy Road Quotes) A playful mind is inquisitive, and learning is fun. (Bumpy Road Quotes) Occasionally it’s been a long and bumpy road - one I’m still travelling - but I’ve always felt like my home town has been solidly behind me and I’m both grateful and proud. (Bumpy Road Quotes) Look at pictures of me growing up. But the places that road will take you, the things you’ll experience, are worth all of the uncertainty. Sometimes we even veer off into the ditch. It’s more like a bumpy road filled with potholes.and detours. (Bumpy Road Quotes) I don’t see love as some perfect happily ever after thing like it is in books and movies. They learn from mistakes and failures, and are not afraid to fail again. That’s what made me what I am today (Bumpy Road Quotes) An optimist understands that life can be a bumpy road, but at least it is leading somewhere. My fair share of bumpy roads and heavy winds. The cash reserves of people have been eaten up by the recent market volatility (Bumpy Road Quotes) I’ve had my ups and downs. Think of the image of a car on a bumpy road to an uncertain destination that has already used up its spare tire. Text Quotes Investors have few spare tires left.
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