Infrared-Sensitive Memory Based on Direct-Grown MoS2 -Upconversion-Nanoparticle Heterostructure.
Yongbiao ZhaiXueqing YangFeng WangZongxiao LiGuanglong DingZhifan QiuYan WangYe ZhouSu-Ting HanPublished in: Advanced materials (Deerfield Beach, Fla.) (2018)
Photonic memories as an emerging optoelectronic technology have attracted tremendous attention in the past few years due to their great potential to overcome the von Neumann bottleneck and to improve the performance of serial computers. Nowadays, the decryption technology for visible light is mature in photonic memories. Nevertheless, near-infrared (NIR) photonic memristors are less progressed. Herein, an NIR photonic memristor based on MoS2 -NaYF4 :Yb3+ , Er3+ upconversion nanoparticles (UCNPs) nanocomposites is designed. Under excitation by 980 nm NIR light, the UCNPs show emissions well overlapping with the absorption band of the MoS2 nanosheets. The heterostructure between the MoS2 and the UCNPs acting as excitons generation/separation centers remarkably improves the NIR-light-controlled memristor performance. Furthermore, in situ conductive atomic force microscopy is employed to elucidate the photo-modulated memristor mechanism. This work provides novel opportunities for NIR photonic memory that holds promise in future multifunctional robotics and electronic eyes.
Keyphrases
- visible light
- photodynamic therapy
- high speed
- atomic force microscopy
- reduced graphene oxide
- fluorescence imaging
- quantum dots
- drug release
- fluorescent probe
- working memory
- energy transfer
- drug delivery
- room temperature
- gold nanoparticles
- highly efficient
- high resolution
- transition metal
- mass spectrometry
- machine learning
- estrogen receptor
- liquid chromatography
- breast cancer cells
- heavy metals