Press

Purdue University innovators are taking cues from nature to develop 3D photodetectors for biomedical imaging. The Purdue researchers used some architectural features from spider webs to develop the technology. Spider webs typically provide excellent mechanical adaptability and damage-tolerance against various mechanical loads such as storms. “We employed the unique fractal design of a spider web for the development of deformable and reliable electronics that can seamlessly interface with any 3D curvilinear surface,” said Chi Hwan Lee, a Purdue assistant professor of biomedical engineering and mechanical engineering. [continue to read]

Conventional melanoma therapies, including chemotherapy and radiotherapy, suffer from the toxicity and side effects of repeated treatments due to the aggressive and recurrent nature of melanoma cells. Less invasive topical chemotherapies have emerged as alternatives, but their widespread uses have been hindered by both the painful size of the microneedles and the rapidly dissolving behavior of polymers used in the treatments. “We developed a novel wearable patch with fully miniaturized needles, enabling unobtrusive drug delivery through the skin for the management of skin cancers,” said Chi Hwan Lee, a Purdue assistant professor of biomedical engineering and mechanical engineering. [continue to read] [movie]

Our hands do so much more than just help us hold on to the world. They grip, but they also sense tactile surfaces and gradients in temperature. They detect pressure and weight to assist us in manipulating items and bracing ourselves. When a person loses a hand or an arm, the most commercially-available prostheses cannot replace all that lost functionality. While there are a few models that employ built-in sensors, they are often prohibitively expensive and suffer from incongruities between structural needs and sensor performance. [continue to read] [movie]

A wearable monitoring device to make treatments easier and more affordable for the millions of people with swallowing disorders is about to be released into the market. Georgia A. Malandraki, an associate professor of speech, language, and hearing sciences in Purdue University’s College of Health and Human Sciences, and Chi Hwan Lee, an assistant professor of biomedical engineering and mechanical engineering in Purdue’s College of Engineering, founded Curasis LLC and serve as an acting chief executive officer and chief technology officer, respectively. [continue to read] [movie]

Although Chi Hwan Lee works with flexible electronics technologies at the cellular and tissue scales, the collaborations he marshals to help advance and translate his innovative technologies operate on an international scale. The assistant professor of biomedical and mechanical engineering at Purdue University is a master collaborator. His partnerships span the globe, from South Korea, across the US, to the faculty member next door. He finds partners in industry, clinics, academia, the governments of two countries, and, serendipitously, while standing in line at Starbucks. [continue to read]

Sensor-instrumented glove for prosthetic hand controls has ability to sense pressure, temperature, hydration using electronic chips sending sensory data through wristwatch. People with hand amputations experience difficult daily life challenges, often leading to lifelong use of a prosthetic hands and services. An electronic glove, or e-glove, developed by Purdue University researchers can be worn over a prosthetic hand to provide humanlike softness, warmth, appearance and sensory perception, such as the ability to sense pressure, temperature and hydration. [continue to read] [movie]

Tissue engineering: it’s an emerging field of biomedical science that holds great promise for helping warfighters recover from injuries or disease–and one poised for a major expansion. Together with Dr. Chi Hwan Lee at Purdue University, HDIAC Subject Matter Expert Joel Hewett discusses the growing global tissue engineering market which is being driven by advancements in 3D bioprinting and non-embryonic, proliferative stem cell research. [continue to read] [movie]

Human pathogens, such as HIV and viruses causing respiratory tract infection, have molecular fingerprints that are difficult to distinguish. To better detect these pathogens, sensors in diagnostic tools need to manipulate light on a But there isn’t a good way to manufacture these light manipulation devices without damaging the sensors. Purdue University engineers have a solution: Stickers. [continue to read]

Medical treatments for a variety of diseases have advanced dramatically in recent decades, but sometimes they come with a cost; namely damage to surrounding tissues and organs. That’s where stem cell research and regenerative medicine come in. Those fields seek to develop new ways of repairing the damage. But how do you see if those repairs are working? [continue to read]

Medical advancements can come at a physical cost. Often following diagnosis and treatment for cancer and other diseases, patients’ organs and cells can remain healed but damaged from the medical condition. In fact, one of the fastest growing medical markets is healing and/or replacing organs and cells already treated, yet that remain damaged by cancer, cardiovascular disease and other medical issues. [continue to read] [movie]

People with diabetes may soon be wearing soft contact lenses that can multitask – improving sight, monitoring glucose levels, and delivering drugs to the eyes all at the same time. Other patients may be fit with a skin-like electronic smart bandage that can monitor medical conditions. [continue to read]

Purdue University researchers have developed a new flexible and translucent base for silicon nanoneedle patches to deliver exact doses of biomolecules directly into cells and expand observational opportunities. [continue to read]

Researchers at Purdue University and the University of Virginia have developed a new fabrication method that makes tiny, thin-film electronic circuits peelable from a surface. The technique not only eliminates several manufacturing steps and the associated costs, but also allows any object to sense its environment or be controlled through the application of a high-tech sticker. [continue to read] [movie]

The ability to fabricate thin-film electronics on wafers and then transfer them to other surfaces could be used to turn everyday objects into smart devices. However, existing methods of separating thin films from their fabrication wafers, including. [continue to read]

A new functioning electronic sticker technology has been discovered at Purdue University by Dr. Chi Hwan Lee and his team. These stickers make any object functional. Using their patented bonding technique allows for the stickers to be placed anywhere more efficiently. It was an idea that started five years ago and is now a reality for Dr. Lee. [movie]

This week the OIS Podcast skims the ocular surface with two interviews. First, we talk with Amy Gallant Sullivan, executive director of the Tear Film and Ocular Surface Society (TFOS), about her organization’s work in raising awareness about the ocular surface disease and dry eye. TFOS and the Alliance for Eye and Vision Research sponsored a congressional briefing on dry eye in Washington, DC, last week. [podcast link]

Researchers have developed soft contact lenses that no only correct vision but also can monitor glucose and medical conditions and be used for ocular pain relief or drug delivery. Sensors or other technology previously couldn’t be used for soft contact lenses because the technology required a rigid, planar surface incompatible with the soft, curved shape of a contact lens. The Purdue University team, led by Chi Hwan Lee, created. [continue to read]

The Implantable Networks of Wireless Nanoelectronic Nodes team won the Purdue College of Engineering Faculty Award of Excellence Team Award. The annual Awards of Excellence for engineering faculty were presented at the Shively Club on April 7, 2017. The purpose of this award is to recognize and encourage teamwork or multidisciplinary efforts by faculty in the College of Engineering. Teams receiving this award have produced. [continue to read]

Chi Hwan Lee, an assistant professor of biomedical engineering and mechanical engineering, has received a $110,000 grant, renewable on an annual basis, from the U.S. Air Force Office of Scientific Research. The grant supports his work to develop flexible probes for use in neural sensing and interfacing on the brain. The probes consist of vertically ordered semiconducting silicon arrays that can transmit electrical signals. [continue to read]

Young Kim and Chi Hwan Lee, researchers in the Purdue Weldon School of Biomedical Engineering, have received funding from the U.S. Air Force Office of Scientific Research in support of their individual projects advancing the development of wearable and implantable nanomaterials. [continue to read]

A skin-like biomedical technology that uses a mesh of conducting nanowires and a thin layer of elastic polymer might bring new electronic bandages that monitor biosignals for medical applications and provide therapeutic stimulation through the skin. [continue to read] [movie]

A durable skin-like bandage created by a Purdue assistant professor might revolutionize biomedical sensing and improve patient care. Chi Hwan Lee’s Lab has developed a product that looks and feels like a bandage, but it’s really a thin electronic device that collect. [continue to read]

The technology has other advantages. According to the Stanford Engineering “Unlike standard thin-film solar cells, peel-and-stick thin-film solar cells do not require any direct fabrication on the final carrier substrate. This is a far more dramatic development than it may initially seem. [continue to read]

Thin-film photovoltaic cells are traditionally fixed on rigid silicon and glass substrates, which severely limits their usefulness, says Chi Hwan Lee, lead author of the paper and a PhD candidate in mechanical engineering at Stanford University. Xiaolin Zheng, a Stanford assistant professor of mechanical engineering. [continue to read]

Researchers created the first flexible, reusable decal-like solar panels that can attach to almost any surface. The Thin-Film Solar Cells (TFSCs) can be affixed to paper, plastic and glass without direct fabrication. The adhesive comes off with some room-temperature water. [continue to read] [movie]

Researchers describe a way to make solar cells that can be applied like stickers to different surfaces, broadening applications. Solar panels are typically heavy, which makes them expensive to install and rigid, which limits where they can be used. In the current issues of Nature Scientific Reports, researchers describe. [continue to read]

Engineers around the world are striving to create new sources of non-polluting energy. Nowhere are these efforts more pronounced than tin the field of solar research. The promise of clean and abundant energy from the sun is fueling a global push. [continue to read]

Engineers around the world are striving to create new sources of non-polluting energy. Nowhere are these efforts more pronounced than tin the field of solar research. The promise of clean and abundant energy from the sun is fueling a global push. [continue to read]

Researchers at Stanford University recently demonstrated a novel wafer-scale lift-off process for fabricating nanowire-based circuits on reusable silicon wafers, then transferring them to any substrate in any shape. The research team claims the flexible circuitry can be used to create. [continue to read]

Electronic circuitry composed of nanowires can now be fitted to a surface of almost any shape on an object made of virtually any material, using a new approach to fabrication and transfer of nanowire electronics developed by Stanford researchers. [continue to read] [movie]