THE MELODIES OF MATERIALS

Last week, as we welcome the new year, I continued exploring materials science beyond the lab, I had the opportunity to speak with Professor Tony Chen, a robotics and mechanical engineering researcher at Georgia Tech (GT). We met at this year’s FRC (First Robotics Competition) Kickoff Event, where thousands of high school robotics competitors and alumni gather together to reveal this season’s challenge. My team was fortunate enough to get a full tour of Tony Chen’s lab and the George W. Woodruff School of Mechanical Engineering’s facilities. 

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In FRC Robotics, materials are not often the main topic of discussion. Regardless of the game, our team ends up using the same aluminium CNC plates, the same Lexan sheets, and the same PLA 3D printed sockets. I was curious to see how Dr. Chen, being an FRC alumnus of my own team, transitioned from this constraint in materials decision to a world of unrestricted and ungrounded discovery.

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Going into the conversation, I expected to hear mostly about robots. But as our discussion unfolded, I realized that materials science plays a much deeper role in robotics that I had initially imagined, just not always in the way I expected. We spoke about his work, his approach to research, and how materials quietly shape what robots can and cannot do. By the end of the conversation, I found myself thinking less about robots alone and more about the intersection between design, materials, and problem-solving.

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Where It All Starts

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Professor Chen made it evident that his research doesn’t begin with materials. It begins with a challenge. 

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Whether it’s designing a robot that can grip a slippery object or perch on a tree, the first question isn’t about what material to use. It’s about how the robot will interact with its environment. As he explained,

 

“the first thing I think about is the contact dynamics [...] how the robot is going to interact.”

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This idea stood out to me because it provided me with a perspective different from how I’ve approached materials science. In many cases, we start with properties like strength, conductivity, or structure. But here, materials come in way later, after the problem has already been framed. It reminded me that engineering isn’t the same in every lab. A notion I have resonated with in the recent past (especially during my time as an entrepreneur in the TiE Atlanta High School Entrepreneurship Program), which I start to hear more often, is that, as the innovator, we don’t try to come up with solutions and fit them to problems. We identify the problem, the “pain point”, and ideate the solution from it.

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When do Materials Become Essential?

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Even though materials aren’t always the starting point for Dr. Chen’s lab and similar labs at Georgia Tech, they often become a deciding factor towards the end. Professor Chen described how many robotic systems rely on basic principles like friction. But this principle is only reliable up to a certain point.

 

“Maybe 50 to 80% of the time, friction works [...] but for the remaining time, it’s not enough.”

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That remaining percentage, however small it may be, is where materials science becomes critical. This is where ideas like gecko-inspired adhesives (Dr. Chen works heavily with bio-inspired robotics), shock-absorbing structures, and direction-dependent materials come into play. These aren’t just improvements. They are what make certain robotics behaviors possible at all.

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One example that stood out to me was materials that respond to external stimuli, like light or magnetic fields. These materials can change shape or apply force, meaning they can act almost like built-in sensors or actuators. It’s a simple reminder and emphasizer of the notion that materials actively shape how a system behaves. However, this “simple reminder” is the core fact that draws me so much to this subject.

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Learning from Nature

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A major part of Professor Chen’s work involves bio-inspired design. This means that he looks at how organisms have already solved complex problems and tries to weave them into mechanical innovations. From geckos that can climb smooth walls to insects that grip rough surfaces with microstructures, nature offers a wide range of solutions.

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“Biology and nature are so amazing [...] the way different organisms interact with the world is incredibly diverse. If you boil it down to physics, there are only a few ways things interact, but how different organisms use that is completely different. Nature has millions of years of evolution behind it [...] and the solutions it comes up with are all completely different.”

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In his lab, this translates into different materials depending on the application. Gecko-inspired systems often use silicone-based materials, for example, while insect-inspired mechanisms can involve rigid microstructures like stainless steel needles. Each choice depends entirely on the function being replicated. Something I resonate with through my research, which Dr. Chen also emphasized that there is never a single “best” material. There’s only the best material for a specific problem.

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Collaboration Across Fields

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One thing that became clear throughout our conversation was how interdisciplinary robotics is. Sure, Professor Chen’s lab does not deal directly with materials analysis and characterization, but this component of his research is critical. When materials become a limiting factor, collaboration becomes essential. Professor Chen talked about working with materials science labs when needed, and how that exchange often is a win-win. Sometimes engineers need materials and sometimes materials scientists need applications.

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My Takeaways

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Overall, speaking with Professor Chen gave me a different perspective on materials science and robotics at Georgia Tech. I greatly appreciate his time and effort in providing me an insight on how my subject love relates directly with his work. In robotics, materials often don’t come first like how I am used to. But as always, they end up becoming the bridge between impossible and possible.

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Dr. Chen reminded me that materials science isn’t just about creating new substances, it’s about enabling new capabilities. Whether it’s improving grip, absorbing energy, or responding to external stimuli, materials quietly define the limits of what systems can do.

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If this conversation taught me anything, it’s that engineering is rarely about a single discipline. It’s about how fields come together to solve problems and none of them could solve alone. I’m excited to keep learning, keep exploring, and see where that intersection leads next. But until dhin . . . stay upbeat, and stay tuned.