国产AV

Hello, my name is Josh Parsons, and I鈥檓 a student employee on the University of Northern Colorado鈥檚 University Relations team. In this podcast, Creative Content Producer, Katie Corder, sits down with 国产AV student Jacob Fry. Jacob is a senior physics major from Aurora.

Jacob received over $1,000 in funding from the Office of Undergraduate Research to compare the chemical make-up of shark teeth using two nanotechnologies. Nanotechnology is basically science, engineering and technology conducted at the nanoscale, equal to one billionth of a meter. It allows researchers to see a vivid image of an item at the atomic and molecular scale.

The first technology he used was an Atomic Force Microscopy, or AFM; this measures an item鈥檚 height, friction and other characteristics. The second one was a Scanning Electron Microscopy, or SEM; this creates images of surface characteristics, such as topography and composition.

From this, he created lab curriculum that will be used during the spring of 2019 as a how-to guide for these nanotechnologies.

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 Can you describe your research to me?

Originally, when it started, I just wanted to look at these shark teeth using something that wasn鈥檛 just my eye. I wanted to see what I could learn from this new form of microscope and see what else is down there 鈥� what is in this bone? But it鈥檚 basically just looking at the chemical response of these electrons and different chemicals that are trace elements in these fossils and seeing first of all where their environment was when they died, what they were eating, and from there, hopefully draw some conclusions.

My research deals with looking at the teeth of dead sharks to determine where these sharks were when they were living. And from there, I wanted to learn more about nanoscience because it鈥檚 really neglected, it鈥檚 pivotal in everything we do. If you鈥檙e doing almost any research now, you鈥檙e going to need a nano instrument, so I wanted to learn how to use them, so I could teach others to use them.

What kind of chemicals would be found on these teeth?

It depends on the ocean, so this is a little Squalicorax 鈥� they call it the, 鈥渃row shark.鈥� They do that because they鈥檙e basically slicing into flesh, so you鈥檙e going to get silicone dioxide, which what does that mean to anyone not in science? It didn鈥檛 mean anything to me honestly, I had to Google it. That鈥檚 in everything; it鈥檚 in living tissues, so as something that seared and ripped flesh, it鈥檚 still sharp. It鈥檚 going to have that trace amount, not only because it鈥檚 a fossil, and it鈥檚 in that living organism, but because it鈥檚 tearing flesh from organisms. So, when this fell down to the sea floor, it had that chemical component with it. But that was very minute, this was coated in gold, so the electrons would react, and I鈥檒l probably made it a necklace, so it had traces of gold. It also of course had calcium 鈥� bones are made of that 鈥� and salt, which you鈥檇 would expect in the ocean.  

Your research is basically 鈥� you鈥檙e using two different imaging capabilities and limitations between the AFM, which stands for Atomic Force Microscopy, and SEM, scanning electron microscopy.  

It sounds like you started off with the AFM, so I assume that鈥檚 more of the norm, and then you decided to test that with a different imaging tool, the SEM, so can you go into summary about those two?

The AFM 鈥� it鈥檚 basically Braille. You know how blind people will use the bumps on something, and they鈥檒l know the meaning of the text? What this thing is using is the braille of microscopy. It鈥檚 feeling for the indentations and bumps on a surface and basically electrons repulse each other; they do not want to be close to each other, and so, that force that鈥檚 causing a little leaver to bounce back and forth, it is being read by a laser, and that is what鈥檚 constructing the image. So, from there, you can see basically the topography, so a 3D map. That proved really hard actually for the teeth because a nanometer to the AFM is a canyon to us. And teeth are notoriously curved, and so the AFM images weren鈥檛 actually that stupendous. I was having to break the teeth and sand them; I actually went to Home Depot to get proper tools, and even then, you really could only see a basic pattern in all the teeth, so no matter what species I looked at, the same pattern, it was almost like waves would appear on the teeth. So, my research advisor, Dr. Sung, said you should use this instrument and this instrument, and she suggested like probably four other ones, and I was like, 鈥淥kay, the SEM, I can do that.鈥� So, I went to that one.

And what is SEM?               

The SEM is a monster, let me tell you. The SEM 鈥� it鈥檚 just like a normal microscope in the sense it鈥檚 using light, and it鈥檚 focusing a beam of electrons onto the sample, and that鈥檚 why that tooth over there was coated in gold because you want these electrons to conduct. And bone 鈥� it鈥檚 not conducive for conducting, so basically, I focus the beam, and depending on how the beam bounces back, I can determine what elements are in there because every element鈥檚 different; they鈥檙e all individuals to a certain extent. That鈥檚 basically what the SEM does. It has a few other functionalities like the EDS, which is just an element analysis that鈥檚 how I determine what composition this tooth is. And I think that鈥檚 the gist of it.

You said that also it鈥檚 way more vivid in detail?

Oh, yes. Going from AFM and then looking at an SEM picture, it鈥檚 more intuitive for the human eye because with the AFM it鈥檚 sort of like going to the moon and trying to determine all these geographical landmarks and then going out to your backyard with the SEM, and you know every single thing.

So, it gives you a more descriptive picture of what you鈥檙e looking at verses a vague, broad picture; therefore, by doing that, you were able to analyze the shark teeth?

Yeah, the AFM does have some potential on really flat things like I have a picture behind me of a CD stamper, and that鈥檚 weird, you would never expect a CD to look like that, but it does. It looks almost like an alligator鈥檚 skin.

Can you explain nanoscience?

It鈥檚 just science that鈥檚 really small 鈥� not quite quantum but nano. The issue that nanoscience faces is it鈥檚 really expensive. I had a scare a few weeks ago where I thought I had broken the cantilever tip on my AFM machine, which is a very expensive fix. Luckily, I was just being stupid, but there is that financial limitation to the research, and that鈥檚 why part of my goal was to develop a plan that exposes undergraduates to nanoscience early without breaking the entire department.

So how are you going about doing that on the more academic curriculum side?

Well, the labs actually kind of wrote themselves because I am a student, and I can think how they鈥檙e thinking because I am in a lab physics course right now. I think the biggest challenge of all was getting it condensed into a lab session, maybe two. That was very difficult because, especially with the AFM, you can spend an entire session just figuring out how to turn it on and get imaging. That was not necessarily a challenge for the SEM because there are enough tutorials, and it鈥檚 pretty intuitive because it鈥檚 visual; whereas, it鈥檚 using quantum mechanics, which any quantum physicist will tell you they don鈥檛 understand it, so that was the big challenge.

Basically, you鈥檙e bringing this more for undergrad researchers interested in nanoscience. How long have you been doing that, and how many classes have you helped shape?

Probably only one directly, which will be next semester鈥檚 lab course, which I鈥檓 actually taking and that鈥檒l be interesting because it鈥檚 like I鈥檓 testing my own hypothesis, but I think indirectly it will shape a lot of future courses because it may unlock the potential of these instruments.

Because right now, there are a lot of labs we鈥檙e doing in this semester鈥檚 course that have been done for over a century. They鈥檙e good experiments, they teach you how to think criticality, but if you want to go to industry as a physicist, chemist, biologist, anything that is based on the innovations of today, you can鈥檛 be playing with a lightbulb, and you won鈥檛 gain the technological advantage from doing that.

That鈥檚 really fun to see how it turns out because that could influence the future of research and classroom here at 国产AV.

I鈥檓 scared because to me these labs are like I can go through them in 30 minutes, and so I didn鈥檛 want them to first be too long, so we鈥檒l see if I made horrible labs that鈥檒l take weeks!

Go back to that Office of Undergrad Research grant: Can you describe the funding you received, and how you went about getting it, like the steps involved?

It was really easy. So, I just sent a little essay, all this preliminary information, and I didn鈥檛 expect to get the full amount I requested, but not enough people applied; there were very few people who applied for research grants, so I lucked out and relatively quickly I got the funding. And so, I wasn鈥檛 planning on even being able to buy samples until mid-July, and it might have been early June, maybe even May, of last year, I got the funding, and it was sort of like a teenager who gets their first paycheck, I just kind of splurged. I got all the best-looking teeth from the Mid-Cretaceous.

How much funding did you receive?

So, about a grand, a little over that.

And that covers everything you need?

It did, and I was worried that I wouldn鈥檛 receive enough to cover a Megalodon tooth because they were the biggest shark that ever existed, you can charge an extra penny for them.

So, what got you into physics? Just because it was a challenge?

I wanted physic because it was hard. I struggle with it every day. You鈥檙e going to college to get something you couldn鈥檛 otherwise get, and I could not teach myself physics if I tried. I needed to be pushed, I needed days where I was close to tears. I think that was a good way to spend my money.  

Can you describe the end goals of this research that was funded as well as any potential next steps?

My end goal is that students enjoy doing nanoscience. They can see the potential in it. Because nanoscience isn鈥檛 just a series of instruments that measure quantity. They鈥檙e not just scales where you put sample on and write down your notes. I think that was the big thing I learned from this, and where future research can jump off from is there is more to look at with even just shark teeth because I did not hit the full potential of the AFM there are other ways of using this machine. You could get an AFM that operates in water, in a vacuum setting, and that might give you entirely different results. You can adjust parameters in this machine and make it almost like an art project.

Can you describe how 国产AV and the faculty here have assisted you through this research and this funding?

I think I am in a unique position on this campus where my department, physics, they really care about undergrads, which is rare because in most institutions grad students teach the undergrads, but we don鈥檛 have a grad program, and the faculty fight to keep this undergraduate-only so they can focus on us. And, I think they just go out of their way to make sure everyone is understanding things, but they don鈥檛 coddle us. At the same time though, they are supportive with my research, they鈥檙e always saying, especially Dr. Sung, she鈥檚 always giving me articles to read, providing me with new information, making events and opportunities possible. I think they鈥檙e extremely supportive.

Would you say 国产AV is a unique institution for supporting undergrad research outside of the, what would be considered, norm in undergrad research at other places?

I think my department and probably loads others are amazing. I think this is one of the few universities that puts education first and puts the money side of things in the back of their mind, which is very rare and commendable.

Thank you, Jacob, for your time and doing the research and everything.

Thank you, of course.

Good luck to you.