Masu bincike a Jami'ar Jihar North Carolina sun ɓullo da wata hanya don sarrafa yanayin tashin hankali na karafa na ruwa ta hanyar amfani da ƙananan ƙarfin lantarki, buɗe kofa ga sabon ƙarni na da'irori na lantarki, eriya da sauran fasahohi.Wannan hanya ta dogara da gaskiyar cewa oxide "fata" na karfe, wanda za'a iya ajiyewa ko cirewa, yana aiki a matsayin surfactant, rage tashin hankali tsakanin karfe da ruwa mai kewaye.googletag.cmd.push(aiki() {googletag.display('div-gpt-ad-1449240174198-2');});
Masu binciken sun yi amfani da karfen ruwa na gallium da indium.A cikin dandali, dandazon alloy yana da matsanancin tashin hankali, kusan 500 millinewtons (mN)/mita, wanda ke sa ƙarfe ya zama faci.
"Amma mun gano cewa aikace-aikacen ƙaramin caji mai kyau - ƙasa da 1 volt - ya haifar da amsawar electrochemical wanda ya haifar da Layer oxide akan saman karfen, wanda ya rage yawan tashin hankali daga 500 mN / m zuwa kusan 2 mN / m."in ji Michael Dickey, Ph.D., masanin farfesa a fannin sinadarai da injiniyan halittu a jihar North Carolina kuma babban marubucin takardar da ke kwatanta aikin."Wannan canjin yana sa ƙarfen ruwa ya faɗaɗa kamar pancake ƙarƙashin ƙarfin nauyi."
Har ila yau, masu binciken sun nuna cewa canjin yanayin tashin hankali yana iya komawa baya.Idan masu bincike sun canza polarity na cajin daga tabbatacce zuwa korau, an cire oxide kuma babban tashin hankali ya dawo.Za'a iya daidaita tashin hankalin saman tsakanin waɗannan maɗaukaki biyu ta hanyar canza damuwa a cikin ƙananan haɓaka.Kuna iya kallon bidiyon dabarar da ke ƙasa.
"Sakamakon canjin tashin hankali na saman yana daya daga cikin mafi girma da aka taɓa yin rikodin, wanda ke da ban mamaki ganin cewa ana iya sarrafa shi a ƙasa da volt," in ji Dickey.“Muna iya amfani da wannan dabarar wajen sarrafa motsin karafa na ruwa, wanda ke ba mu damar canza siffar eriya da kera ko karya da’ira.Hakanan za'a iya amfani dashi a cikin tashoshi na microfluidic, MEMS, ko na'urorin hoto da na gani.Yawancin abubuwa suna samar da oxides na sama, don haka ana iya fadada wannan aikin fiye da karafa na ruwa da aka yi nazari a nan. ”
Lab din Dickey a baya ya nuna hanyar "buga 3D" na ruwa mai ruwa wanda ke amfani da Layer oxide wanda ke samuwa a cikin iska don taimakawa karfen ruwa ya riƙe siffarsa - kwatankwacin abin da Layer oxide yayi tare da gami a cikin maganin alkaline..
"Muna tunanin oxides suna nuna hali daban-daban a cikin mahalli na asali fiye da a cikin iska," in ji Dickey.
Ƙarin bayani: The labarin "Giant da switchable surface ayyuka na ruwa karfe ta hanyar hadawan abu da iskar shaka" za a buga a kan yanar-gizo a kan Satumba 15 a cikin Proceedings na National Academy of Sciences:
Idan kun ci karo da rubutu, kuskure, ko kuna son ƙaddamar da buƙatun don gyara abubuwan da ke cikin wannan shafin, da fatan za a yi amfani da wannan fom.Don tambayoyi na gaba ɗaya, da fatan za a yi amfani da fam ɗin tuntuɓar mu.Don ƙarin bayani, da fatan za a yi amfani da sashin sharhi na jama'a a ƙasa (shawarwari don Allah).
Ra'ayin ku yana da mahimmanci a gare mu.Koyaya, saboda yawan saƙon, ba za mu iya ba da garantin amsa kowane mutum ba.
Ana amfani da adireshin imel ɗin ku kawai don sanar da masu karɓa wanda ya aika imel ɗin.Ba za a yi amfani da adireshin ku ko adireshin mai karɓa don wata manufa ba.Bayanin da kuka shigar zai bayyana a cikin imel ɗin ku kuma Phys.org ba za a adana shi ta kowace hanya ba.
Sami sabuntawa na mako-mako da/ko yau da kullun a cikin akwatin saƙo naka.Kuna iya cire rajista a kowane lokaci kuma ba za mu taɓa raba bayanan ku tare da wasu mutane na uku ba.
Wannan gidan yanar gizon yana amfani da kukis don sauƙaƙe kewayawa, bincika amfanin ku na ayyukanmu, tattara bayanai don keɓance tallace-tallace, da samar da abun ciki daga ɓangare na uku.Ta amfani da gidan yanar gizon mu, kun yarda cewa kun karanta kuma kun fahimci Manufar Sirrin mu da Sharuɗɗan Amfani.