title: A wearable multiplexed silicon nonvolatile memory array using nanocrystal charge confinement.
abstract: Strategies for efficient charge confinement in nanocrystal floating gates to realize high-performance memory devices have been investigated intensively. However, few studies have reported nanoscale experimental validations of charge confinement in closely packed uniform nanocrystals and related device performance characterization. Furthermore, the system-level integration of the resulting devices with wearable silicon electronics has not yet been realized. We introduce a wearable, fully multiplexed silicon nonvolatile memory array with nanocrystal floating gates. The nanocrystal monolayer is assembled over a large area using the Langmuir-Blodgett method. Efficient particle-level charge confinement is verified with the modified atomic force microscopy technique. Uniform nanocrystal charge traps evidently improve the memory window margin and retention performance. Furthermore, the multiplexing of memory devices in conjunction with the amplification of sensor signals based on ultrathin silicon nanomembrane circuits in stretchable layouts enables wearable healthcare applications such as long-term data storage of monitored heart rates.
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Jaemin
authors.initials: J
authors.lastname: Kim
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Donghee
authors.initials: D
authors.lastname: Son
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Mincheol
authors.initials: M
authors.lastname: Lee
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Changyeong
authors.initials: C
authors.lastname: Song
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Jun-Kyul
authors.initials: JK
authors.lastname: Song
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.; Interdisciplinary Program for Bioengineering, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Ja Hoon
authors.initials: JH
authors.lastname: Koo
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Dong Jun
authors.initials: DJ
authors.lastname: Lee
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Hyung Joon
authors.initials: HJ
authors.lastname: Shim
authors.affiliation: School of Mechanical Engineering, Pusan National University, Busan 609-735, Republic of Korea.
authors.forename: Ji Hoon
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Department of Physics, Inha University, Incheon 402-751, Republic of Korea.
authors.forename: Minbaek
authors.initials: M
authors.lastname: Lee
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Republic of Korea.; Interdisciplinary Program for Bioengineering, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Taeghwan
authors.initials: T
authors.lastname: Hyeon
authors.affiliation: Center for Nanoparticle Research, Institute for Basic Science (IBS), Seoul 151-742, Republic of Korea.; School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-742, Republic of Korea.; Interdisciplinary Program for Bioengineering, Seoul National University, Seoul 151-742, Republic of Korea.
authors.forename: Dae-Hyeong
authors.initials: DH
authors.lastname: Kim
mesh_terms: D016248:Computer Storage Devices; D004581:Electronics / Q000295:instrumentation; D004867:Equipment Design / Q000941:ethics / Q000379:methods; D016247:Information Storage and Retrieval / Q000379:methods*; D018625:Microscopy, Atomic Force / Q000379:methods; D053758:Nanoparticles / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D012825:Silicon / Q000737:chemistry*
chemical_list: D012825:Silicon
keywords: Wearable electronics; langmuir-Blodgett assembly; nanocrystal floating gate; nonvolatile memory; silicon nanomembrane