Jianliang Xiao is a “mechanics of materials” expert launching innovations in soft materials and flexible electronics. His work recently earned him an exclusive spot amongst some of the most successful academic inventors in the world.

Jianliang Xiao, associate professor of mechanical engineering and senior member of the National Academy of Inventors (NAI).

Xiao, an associate professor in the Paul M. Rady Department of Mechanical Engineering, has been . The program recognizes rising innovators who have had success securing patents, licensing and commercialization for developed technologies that showcase real impact on the welfare of society.

“I am extremely excited and honored to join this group of incredible innovators as a senior member,” said Xiao, who is also affiliated with the Materials Science and Engineering Program at CU Boulder. “Thank you to the students in my research group for their contributions. We see this not just as recognition, but as stimulation. It encourages us to work harder and make an even greater impact on society in the future.”

The induction comes on the heels of two recent patents that Xiao and his team in the Xiao Research Group have received. The first is a smart and comfortable in-ear device that can detect signals from the brain and facial area to help diagnose sleep disorders.

The second is a series of wearable electronic systems also designed for health monitoring purposes. Not only can they be worn, but they can also be recycled. 

According to the World Health Organization, a record 62 million tons of electronic waste was produced globally in just 2022 alone. Xiao says this technology has the power to drastically reduce this number and make way for a cleaner global footprint. 

“Our work is focused on a combination of smart materials and flexible electronics,” Xiao said. “Not only do we have patents for these technologies, but startup companies are working to commercialize them so that, hopefully in a few years, they can make a real impact on people’s lives.”

Xiao and his group will continue to fuel their inventive spirit. The team of inventors are actively seeking collaborations with other experts in various disciplines, including healthcare.

But despite his achievement, Xiao remains steady on one principle: it takes a vast ecosystem to have innovative and entrepreneurial success.

“Thank you to the people at the Research and Innovation Office and the Venture Partners at CU Boulder,” said Xiao. “They have offered tremendous support during my journey and nomination.”

This year’s cohort of NAI inductees is the largest since the program’s inception in 2018. Comprised of 162 emerging inventors from institutions across the nation, the collective group is named on over 1,200 U.S. patents.

The 2025 class of senior members will be officially celebrated during the Senior Member Induction Ceremony at NAI’s 14th annual conference in Atlanta, Georgia, from June 23-26.

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Two undergraduate students in the Paul M. Rady Department of Mechanical Engineering have solidified themselves amongst the future leaders of aerospace.

First-year mechanical engineering student and 2025 Patti Grace Smith Fellow Caleb Woldemichael at Lockheed Martin.

Third-year student  and first-year student  were selected as Patti Grace Smith Fellows. The prestigious program is designed to help accelerate the careers of high-achieving Black students across the nation–a population that statistically remains underrepresented throughout the aerospace industry.

This year’s class of fellows featured 176 top-rated students from twenty-four different universities. Recipients of the award receive networking opportunities across the industry, personalized mentorship, a valuable summer internship at one of America’s leading aerospace companies and their share of nearly $500,000 in total scholarships.

“I’m honored to be a Patti Grace Smith Fellow,” said Woldemichael. “Breaking into aerospace can feel impossible and I definitely know what it’s like to be the only person of color in a room full of STEM students. This fellowship gives us a chance to get technical, hands-on experience and connect with other successful fellows throughout the industry.”

The Patti Grace Fellowship selection process is often described as one of the most rigorous in the country. Multiple rounds of screening and interviews with the nation’s most sought after aerospace employers ensures the candidates exhibit extraordinary professional aptitude and proven leadership qualities. 

Third-year mechanical engineering student Asaiah Gifford during a Summer Program for Undergraduate Research (SPUR) presentation.

The program’s applicant pool nearly doubled this year, as well, creating an even more competitive landscape than ever before. But Gifford believes the difficulty is what made the process memorable and inspiring.

“During one of my interviews I spoke with one of the fellows from a past class,” she said. “I was able to ask her a few questions about the fellowship and the difference it can make in the industry. She explained the hardships of being a Black engineer and shared how the program helped her push forward. Hearing that really just excited me and helped me have fun with this whole process.”

In 1963, Patti Grace Smith was a plaintiff in a landmark Supreme Court case that integrated public schools in Alabama. She would later go on to have an illustrious aerospace career, leading the Federal Aviation Administration’s Office of Commercial Space Transportation and earning the General James E. Hill Lifetime Space Achievement Award, one of the highest honors awarded to aerospace professionals.

Her perseverance helped break barriers and usher in a new era of educational inclusivity, a legacy that today’s fellows are looking to uphold.

“There have been times where I’ve wondered if I’m good enough. I know what it’s like and I’m only a freshman, so I know I will face more difficulties,” said Woldemichael. “I hope future engineers can see this fellowship and push past this lack of representation, too.”

“This fellowship has taught me that being multifaceted is not a hindrance,” Gifford added. “A lot of people in engineering tend to prioritize only technical expertise, but the person matters, too. The Patti Grace Fellowship cares about how engineering impacts people, and I hope to expand on that going forward.”

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With rapid advancements in robotics and AI, the line between science fiction and reality continues to blur. At the heart of this innovation lies a breakthrough: drones designed to solve pressing global challenges, from pollinating crops to navigating wildfire zones.

This vision drives Assistant Professor Chahat Singh, leader of the  (Perception, Robotics, AI and Sensing) Lab in the Paul M. Rady Department of Mechanical Engineering. With an academic background spanning electronics, robotics, and computer science, Singh is dedicated to exploring the frontiers of bio-inspired robotics and AI in resource-constrained systems.

Assistant Professor Chahat Singh next to one of his compact and autonomous robotic designs.

Singh’s overarching research question is deceptively simple: What is the minimum amount of computational power, sensor capability, and resources required for small robots to achieve autonomy? This challenge is compounded by the scale of the robots he designs, which are constrained by limited computational capacity and lightweight requirements. They are two to three inches in length and orders of magnitude smaller in terms of physical size and computational power than traditional robots. “We’re working with systems that have 100 times less computing power than a Boston Dynamics’ Spot robot,” Singh explained. “The goal is to achieve autonomy with the bare minimum.”

One of Singh’s most notable projects focuses on autonomous drones for pollination, inspired by the overwhelming loss of honeybee colonies. “The question was whether today’s robotics and AI could fill this gap until we have a more sustainable biological solution,” Singh said. The answer lies in his innovative, lightweight drones that can navigate autonomously through forests and fields without relying on external communication or GPS, making them secure and efficient.

Singh’s current drone model incorporates multiple onboard cameras, which enables it to identify and align with flowers for pollination. The cameras use advanced neural depth-perception algorithms powered by AI-accelerated computers. Many creatures have developed different pupil shapes based on their habitats which allow variations in incoming light and amount of blur to help them determine the depth of objects. “The cameras are inspired by biological systems,” he explained.  

Singh showcasing the small scale of materials in his robot's design. His goal is to develop autonomous drones with less resources and power than traditional robots.

Singh’s drones are not just technologically advanced—they’re engineering marvels. Built from carbon fiber frames, these drones are lightweight yet robust, weighing around 250 grams. They use lithium ion batteries which are heavy and tend to die quickly, so he has started to look at ways to charge the batteries while the robots are outside. 

To overcome these limitations, Singh has developed a “mother drone” system. The larger drone carries smaller drones to the target area and acts as a mobile charging station. Once deployed, the smaller drones autonomously search for flowers and begin pollination. This approach not only extends operational time but also reduces the energy expenditure of individual drones. “It’s a highly efficient system that mirrors natural ecosystems,” Singh said.

While the pollination drones have gathered attention, Singh’s research has broader implications. His team is working on compressing advanced AI models, such as language and vision models, to operate on resource-constrained systems. “Imagine a robot navigating a forest during a wildfire,” Singh said. “It needs to make decisions on the spot, without internet access or pre-programmed instructions. That’s the next frontier—embedding foundational AI models into small, autonomous robots.”

Singh’s vision extends to deploying fleets of robots for tasks like firefighting, disaster response, and ecological monitoring. By creating swarms of cost-effective, autonomous robots, he aims to revolutionize industries that rely on expensive, large-scale systems. “Smaller robots are not just cool—they’re necessary,” he emphasized. “They offer safety, robustness, and cost-effectiveness.”

Despite the groundbreaking nature of his work, he is committed to open-source principles. “I believe in openness because this research is for the greater good,” he said. Singh has already shared software for drone operation and plans to release additional resources to empower other researchers and innovators.

When asked about his favorite part of the research, Singh highlighted the hope it brings for the future. “Whether it’s addressing ecological crises or enhancing technology, I want to create robot systems that are safe, innovative and sustainable,” he said. “This is about pushing the boundaries of what’s possible while respecting the natural world.”

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Imagine a future where renewable energy storage is not just efficient but also sustainable, scalable, and ethical. This vision is what drives Charley Thomas, a fifth-year PhD student working on cutting-edge battery technology. From solid electrolytes to sodium-ion batteries, Thomas is tackling some of the most pressing challenges in energy storage.

In her current research with the Ban Surface Science and Engineering Research Group, Thomas works on two distinct projects: stress-testing solid electrolytes and developing cathodes for sodium-ion batteries. While both are pivotal in advancing battery science, each presents its own unique challenges and rewards.

Solid electrolytes are a promising alternative to traditional liquid-based systems in lithium-ion batteries. However, testing them is notoriously complex. “Stress-testing solid electrolytes sucks,” Thomas said. “There’s no perfect method for evaluating their performance.”

One commonly used test involves symmetrical cells, where the same electrode is placed on both sides of the solid electrolyte. Critical current density testing—ramping up the current until a short circuit occurs—is used to evaluate the material's performance. But this method has its flaws. “Critical current density isn’t a true material property. It’s influenced heavily by the experimental setup,” Thomas explained.

Despite these challenges, Thomas is dedicated to refining her methods, even when it involves tedious and high-stakes procedures like dipping electrolyte pellets into molten lithium at 180 C. “It’s frustrating when the pellets shatter during the process, but each failure teaches us something valuable,” she said.

Thomas’ second project, focused on sodium-ion batteries, offers a hands-on approach to cathode development. Sodium-ion technology has the potential to address ethical and material scarcity concerns associated with lithium-based systems, as sodium is far more abundant and affordable.

“What excites me about this project is that I get to start from the ground up,” Thomas shared. Using common salts—sometimes even dietary supplements—she synthesizes particles, cleans and dries them, and assembles them into electrodes for testing.

This process has deepened Thomas’ understanding of battery fundamentals. “Unlike solid electrolyte testing, which uses symmetrical cells, working with cathodes involves real chemical potential differences and redox reactions. It’s helping me truly grasp how batteries work,” she said.

Thomas’ ultimate goal is to contribute to sustainable energy storage systems that could revolutionize how we power our world. While initially drawn to academia for its teaching opportunities, she is now exploring postdoctoral research as the next step.

“Work-life balance is important to me, so I’m reevaluating my long-term plans,” she said. “But no matter where I end up, I want to be part of the shift towards renewable, ethical energy storage.”

As she continues refining solid electrolytes and advancing sodium-ion technology, Thomas’ work embodies the intersection of innovation, sustainability, and first-principles science. “When a project finally works—when a battery has great capacity or lasts a long time—it’s the best feeling,” she said.

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A team of engineers and material scientists in the Paul M. Rady Department of Mechanical Engineering at CU Boulder has developed a new technology to turn thermal radiation into electricity in a way that literally teases the basic law of thermal physics.

The breakthrough was discovered by the , led by Assistant Professor Longji Cui. Their work, in collaboration with researchers from the National Renewable Energy Laboratory (NREL) and the University of Wisconsin-Madison, was recently . 

The group says their research has the potential to revolutionize manufacturing industries by increasing power generation without the need for high temperature heat sources or expensive materials. They can store clean energy, lower carbon emissions and harvest heat from geothermal, nuclear and solar radiation plants across the globe.

In other words, Cui and his team have solved an age-old puzzle: how to do more with less.

“Heat is a renewable energy source that is often overlooked,” Cui said. “Two-thirds of all energy that we use is turned into heat. Think of energy storage and electricity generation that doesn’t involve fossil fuels. We can recover some of this wasted thermal energy and use it to make clean electricity.”

Breaking the physical limit in vacuum

High-temperature industrial processes and renewable energy harvesting techniques often utilize a thermal energy conversion method called thermophotovoltaics (TPV). This method harnesses thermal energy from high temperature heat sources to generate electricity. 

But existing TPV devices have one constraint: Planck’s thermal radiation law. 

PhD student Mohammad Habibi showcasing one of the group's TPV cells used for power generation. Habibi was the leader of both the theory and experimentation of this groundbreaking research.

“Planck’s law, one of most fundamental laws in thermal physics, puts a limit on the available thermal energy that can be harnessed from a high temperature source at any given temperature,” said Cui, also a faculty member affiliated with the Materials Science and Engineering Program and the Center for Experiments on Quantum Materials. “Researchers have tried to work closer or overcome this limit using many ideas, but current methods are overly complicated to manufacture the device, costly and unscalable.”

That’s where Cui’s group comes in. By designing a unique and compact TPV device that can fit in a human hand, the team was able to overcome the vacuum limit defined by Planck’s law and double the yielded power density previously achieved by conventional TPV designs. 

“When we were exploring this technology, we had theoretically predicted a high level of enhancement. But we weren’t sure what it would look like in a real world experiment,” said Mohammad Habibi, a PhD student in Cui’s lab and leader of both the theory and experiment of this research. “After performing the experiment and processing the data, we saw the enhancement ourselves and knew it was something great.”

The zero-vacuum gap solution using glass

The research emerged, in part, from the group’s desire to challenge the limits. But in order to succeed, they had to modify existing TPV designs and take a different approach.

“There are two major performance metrics when it comes to TPV devices: efficiency and power density,” said Cui. “Most people have focused on efficiency. However, our goal was to increase power.”

The zero-vacuum gap TPV device, designed by the Cui Research Group.

To do so, the team implemented what’s called a “zero-vacuum gap” solution into the design of their TPV device. Unlike other TPV models that feature a vacuum or gas-filled gap between the thermal source and the solar cell, their design features an insulated, high index and infrared-transparent spacer made out of just glass. 

This creates a high power density channel that allows thermal heat waves to travel through the device without losing strength, drastically improving power generation. The material is also very cheap, one of the device’s central calling cards.

“Previously, when people wanted to enhance the power density, they would have to increase temperature. Let’s say an increase from 1,500 C to 2,000 C. Sometimes even higher, which eventually becomes not tolerable and unsafe for the whole energy system,” Cui explained. “Now we can work in lower temperatures that are compatible with most industrial processes, all while still generating similar electrical power than before. Our device operates at 1,000 C and yields power equivalent to 1,400 C in existing gap-integrated TPV devices.”

The group also says their glass design is just the tip of the iceberg. Other materials could help the device produce even more power.

“This is the first demonstration of this new TPV concept,” explained Habibi. “But if we used another cheap material with the same properties, like amorphous silicon, there is a potential for an even higher, nearly 20 times more increase in power density. That’s what we are looking to explore next.”

The broader commercial impact

Assistant Professor Longji Cui (middle) and the Cui Research Group. 

Cui says their novel TPV devices would make its largest impact by enabling portable power generators and decarbonizing heavy emissions industries. Once optimized, they have the power to transform high-temperature industrial processes, such as the production of glass, steel and cement with cheaper and cleaner electricity.

“Our device uses commercial technology that already exists. It can scale up naturally to be implemented in these industries,” said Cui. “We can recover wasted heat and can provide the energy storage they need with this device at a low working temperature.

“We have a patent pending based on this technology and it is very exciting to push this renewable innovation forward within the field of power generation and heat recovery.” 

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