Associate Professor Eunah Kang and Mr. Youngjun Kim from the School of Chemical Engineering and Material Science at Chung-Ang University, Korea have recently come up with an elegant solution. The duo has developed an electrochemical DNA biosensor using a graphitic nano-onion/molybdenum disulfide (MoS2) nanosheet composite, which effectively detects human papillomavirus (HPV)-16 and HPV-18, and can serve as an early diagnosis of cervical cancer.