Skills:
hardware prototyping;
wearable design;
user studies;
research paper writing;
VR integration
Chemical Haptics: Rendering Haptic Sensations via Topical Stimulants
Jasmine Lu, Ziwei Liu, Jas Brooks, and Pedro Lopes.
ACM UIST User Interface Software and Technology Symposium, 2021
doi.org/10.1145/3472749.3474747
Motivation
Most haptic devices rely on mechanical actuation and can only stimulate mechanoreceptors. Many skin receptors — thermoreceptors, nociceptors — are chemically sensitive and govern sensations like warmth, cold, and tingling that are hard to reproduce mechanically. Could we trigger them directly through chemistry?
Contribution
We introduce Chemical Haptics: a wearable silicone patch with embedded micropumps that delivers topical stimulants to the skin, chemically triggering receptors to produce distinct sensations. We identified five effective compounds — sanshool (tingling), lidocaine (numbing), cinnamaldehyde (stinging), capsaicin (warming), and menthol (cooling) — all from a single actuator. Two user studies confirmed distinct temporal profiles per chemical and significantly increased VR immersion compared to no haptics.
And beyond...
Chemical haptics opens a pathway to sensations that mechanical actuators simply cannot produce — and it does so with a device light enough to wear on the face, arm, or leg without restricting movement.
This work raises interesting questions about the future of embodied interaction: if we can chemically render the feeling of cold air, electric sparks, or numbness, what else might be possible? And how do we think carefully about consent and safety as haptic interfaces become more intimate?
I'm excited to keep exploring the intersection of chemistry, the body, and interactive systems — and what it means to design for the full range of human sensation.