Cov kws tshawb fawb ntawm Rice University tau tsim cov cuab yeej cuab tam hauv lub xeev uas tso cai rau kev khaws cia siab nrog qhov tsawg kawg ntawm kev ua yuam kev hauv computer.

Cov kev nco yog nyob ntawmtantalum oxide hmoov, ib qho insulator hauv electronics. Siv qhov hluav taws xob mus rau 250-nanometer-thick sandwich ntawm graphene, tantalum, nanoporoustantalumoxide thiab platinum tsim cov khoom siv nyob qhov twg cov khaubncaws sab nraud povtseg. Tswj voltages uas hloov cov pa oxygen ions thiab cov chaw ua haujlwm hloov cov khoom ntawm ib qho thiab xoom.

Qhov kev tshawb pom los ntawm Rice lab ntawm chemist James Tour tuaj yeem tso cai rau crossbar array nco uas khaws cia txog 162 gigabits, ntau dua li lwm lub cim xeeb oxide raws li kev tshawb nrhiav los ntawm cov kws tshawb fawb. (Yim khoom sib npaug ib byte; ib chav 162-gigabit yuav khaws txog 20 gigabytes ntawm cov ntaub ntawv.)

Cov ntsiab lus tshwm sim hauv online hauv American Chemical Society JournalNano Cov Ntawv.

Zoo li lub Tour lab qhov kev tshawb pom yav dhau los ntawm silicon oxide nco, cov cuab yeej tshiab yuav tsum tsuas yog ob lub electrodes ib lub voj voog, ua rau lawv yooj yim dua li niaj hnub flash nco uas siv peb. "Tab sis qhov no yog ib txoj hauv kev tshiab los ua ultradense, tsis muaj lub cim xeeb hauv computer," Ncig saib.

Nonvolatile nco tuav lawv cov ntaub ntawv txawm tias thaum lub hwj chim tawm, tsis zoo li qhov tsis zoo ntawm kev nkag mus rau lub computer nco uas poob lawv cov ntsiab lus thaum lub tshuab kaw.

Niaj hnub nimno nco chips muaj ntau yam yuav tsum tau: Lawv yuav tsum nyeem thiab sau cov ntaub ntawv ntawm kev kub ceev thiab tuav kom ntau li ntau tau. Lawv kuj yuav tsum tau ruaj khov thiab qhia tau zoo khaws cov ntaub ntawv thaum siv lub zog tsawg.

Tour hais tias Rice tus qauv tshiab, uas yuav tsum tau 100 lub sij hawm tsawg zog tshaj li tam sim no, muaj peev xwm mus ntaus tag nrho cov cim.

“Qhov notantalumnco yog nyob ntawm ob lub davhlau ya nyob twg, yog li nws tau teeb tsa rau 3-D nco pawg, "nws hais. "Thiab nws tsis txawm xav tau diodes lossis selectors, ua rau nws yog ib qho yooj yim ultradense nco los tsim. Qhov no yuav yog tus neeg sib tw tiag tiag rau qhov kev xav tau loj hlob nyob rau hauv cov ntsiab lus video cia thiab server arrays. "

Cov txheej txheem txheej muaj tantalum, nanoporous tantalum oxide thiab multilayer graphene ntawm ob platinum electrodes. Hauv kev tsim cov khoom, cov kws tshawb fawb pom tias tantalum oxide maj mam poob oxygen ions, hloov los ntawm cov pa oxygen nplua nuj, nanoporous semiconductor nyob rau sab saum toj mus rau oxygen-tsis zoo hauv qab. Qhov twg cov pa oxygen ploj mus tag, nws dhau los ua ntshiab tantalum, hlau.