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重磅!科学家发现了第Ⅰ种二维冰相
作者:admin    发布日期:2020/1/2     关注次数:      二维码分享

SHENGWUKANGDONGDANBAIRUHEKANGJIEBING,BINGCHUANZHIJIANDEXIANGDUIHUAYI、DAQICHOUYANGDEJIANGJIECUIHUA,DOUYUBINGDEJIEGOUHECHENGHESHENGZHANGMIQIEXIANGGUAN。

JINGGUOJINBAINIANDETANSUO,RENMENYIJINGFAXIANLEBINGDE18ZHONGSANWEIJINGTIJIEGOU,QIZHONGZIRANJIEzuiCHANGJIANDEJIUSHILIUJIAOXINGDEBINGXIANG。RANER,SHIFOUYOUWENDINGCUNZAIDEERWEIBING,XUESHUJIEYIZHIYOUHENDAZHENGYI。

AG奔驰宝马多人版 JINRI,BEIJINGDAXUE、MEIGUONEIBULASIJIADAXUELINKENFENXIAOYIJIZHONGGUOKEXUEYUANDEYANJIUTUANDUI,LIYONGGAOFENBIANqPlusXINGYUANZILIXIANWEIJINGJISHU,SHOUCIZAISHIYANSHANGZHENGSHILEERWEIBINGDECUNZAI,BINGYIYUANZIJIFENBIANLVPAIDAOLEERWEIBINGDEXINGCHENGGUOCHENG,JIESHIQITESHUDESHENGZHANGJIZHI。BEIJINGSHIJIAN1YUE2RI,GAICHENGGUOZAIGUOJIDINGJIXUESHUQIKAN《ZIRAN》FABIAO。

AG奔驰宝马多人版 ERWEIBINGYOULIANGCENGLIUJIAOBINGDUIDIEERCHENG,LIANGCENGZHIJIANKAOQINGJIANLIANJIE

AG奔驰宝马多人版 ZAOZAI20SHIJI20NIANDAI,YINGGUOZHUMINGWULIXUEJIA、XSHEXIANFAXIANZHEBULAGEYUQITAJIWEIKEXUEJIABIANFENBIELIYONGXSHEXIAN“MIAOHUI”BINGJINGTIJIEGOU,LAKAILESANWEIBINGJIEGOUYANJIUDEXUMU。2015NIAN,SHIMOXIFAXIANZHEANDELU?GAIMUDAILINGDETUANDUIZAISHUANGCENGSHIMOXIJIANFAXIANLEYIZHONGSIFANGERWEIBINGXIANG,HONGDONGXUESHUJIE,DANZHEIZHONGERWEIBINGSUIHOUBEIZHIYISHILVHUANADEJINGTIJIEGOU,ERWEIBINGCUNZAIYUFOUYIZHICHENGMI。

(a)NANJILUOSIHAISHANGDEHOUBINGCENG;(b)ZIRANJIEzuiCHANGJIANBINGXIANG(Ice Ih)DEFENZIMOXING;(c)BENYANJIUFAXIANDEERWEIBING(SHIYANJIEGUODE3DXIAOGUOTU)。SHOUFANGZHEGONGTU

ZAICICIYANJIUZHONG,KEYANRENYUANJINGQUEKONGZHIWENDUHESHUIYA,ZAISHUSHUIDEJINCHENDISHANG,SHENGZHANGCHUYIZHONGDANJINGERWEIBINGJIEGOU。TAMENJIANGFEIQINRAOSHIYUANZILIXIANWEIJINGCHENGXIANGJISHUYUNYONGYUERWEIBINGDEYAFENZIJIFENBIANCHENGXIANG,ZAIJIEHELILUNJISUANQUEDINGLEQIYUANZIJIEGOU。

“结果表明,二维冰由两层六角冰无旋转堆叠而成,两层之间靠氢键连接,每个水分子与同一层的水分子形成三个氢键,与上下层的水分子形成一个氢键,因此所有的氢键都被饱和,结构非常稳定,是一种可以独立存在的‘自饱和’二维冰。 ”北京大学量子材料中心教授江颖说。
AG奔驰宝马多人版此次研究发现的二维冰,不再是传统的四面体结构,而是六边形的二维平面结构,表面非常平整。1997年,美国科学家古贺、曾晓成等人利用分子动力学模拟首次预测了这种“互锁型”双层二维冰,但一直缺乏确切的实验证据。因此,此次研究也是第Ⅰ种被实验所证实的二维冰结构,研究人员将它正式命名为“二维冰I相”。

ZENYANGCAINENGKANDAOERWEIBINGDEXINGCHENG?YANJIURENYUANQIAOMIAODIJIANGERWEIBINGCONG-153SHESHIDUDAO“SUDONG”DAO-268SHESHIDU,BABINGSHENGZHANGGUOCHENGZHONGDEYIXILIEZHONGJIANZHUANGTAIDONGJIEXIALAI,BINGDUIQIJINXINGLEWENDINGDECHENGXIANG,zuiZHONGKANQINGLEERWEIBINGZAIYUANZICHIDUDEDONGTAISHENGZHANGGUOCHENG。

TONGSHI,TAMENJIEHELILUNJISUANHEMONI,TICHULEERWEIBINGDAOJUCHIZHUANGBIANJIEDE“DAQIAO”SHISHENGZHANGHEFUYIZHUANGBIANJIEDE“BOZHONG”SHISHENGZHANGJIZHI。ERQIE,ERWEIBINGBIANJIEYAWENTAIDEXIANGDUIWENDINGXING,YUCHENDIDEJUTIJIEGOUJIHUWUGUAN。

ERWEIBINGDAONEIBUJIEGOUDEYAFENZIJIFENBIANCHENGXIANG。a、bTUZHONGCONGZUOZHIYOU,YICIWEIYOUGAOZHIDIBUTONGZHENJIANGAODUXIADEYUANZILIXIANWEIJINGSHIYANTUHEMONITU;cWEIERWEIBINGJIEGOUDEMOXINGSHIYITUDEFUSHITUHECESHITU。

AG奔驰宝马多人版 DUIYUYANFAFANGJIEBING、RUNHUACAILIAOYIYI ZHONGDA

ZHANGJIUYILAI,BINGSHIRUHECHENGHE、SHENGZHANGDE,DADOUJUXIANZAIHONGGUANCHIDUDEYANJIU,QUESHAOWEIGUANCHIDUSHANGDETUXIANG。GAIYANJIUSHOUCISHIXIANLEERWEIBINGCHENGHESHENGZHANGDEYUANZICHIDUBIAOZHENG,YOUZHUYURENMENLIJIEBINGZAIDIWEIHESHOUXIANTIAOJIANXIADEXINGTAIHESHENGZHANGGUOCHENG。

ERWEIBINGDEFAXIANBUJINTIAOZHANLEYIBAIDUONIANLAIRENMENDUIBINGXIANGDECHUANTONGRENSHI,ERQIEYINGYONGQIANJINGGUANGKUO。“LIRU,WOMENzuiJINFAXIANERWEIBINGDUIYUSANWEIBINGDESHENGZHANGJUYOUZHONGYAOYINGXIANG。RUGUOYOUERWEIBINGDECUNZAI,SANWEIBINGHUITIEZHEBIAOMIANSHENGZHANG,FEICHANGWENGU。DANRUGUOMEIYOUERWEIBING,XINGCHENGDESANWEIBINGYUBIAOMIANJIECHUMIANHENXIAO,HENRONGYIBEIFENGCHUIZOU。

以我们可以根据二维冰的结构更有针对性的设计和研发防结冰材料。 ”江颖认为,二维冰中水分子所有的氢键都被饱和,因此与表面的相互作用极小,可以起到超润滑的作用。利用二维冰,可以减小材料之间的摩擦。
二维冰岛的锯齿状(a)边界和扶椅状(b)边界对应的“搭桥”式和“播种”式生长模式。

TONGSHI,ERWEIBINGKEYIZUOWEIYIZHONGTESHUDEERWEICAILIAO,WEIGAOWENCHAODAODIANXING、SHENZIWAITANCE、LENGDONGDIANJINGCHENGXIANGDENGYANJIUTIGONGQUANXINDEPINGTAI。

AG奔驰宝马多人版 “GAIYANJIUDAKAILEERWEIBINGJIAZUXILIEYANJIUDEDAMEN,TONGSHI,ZHEIZHONGERWEIBINGDESHENGZHANGJILIYUYIQIANSUOJIESHIDEFENGWOERWEICAILIAO,RUSHIMOXI、DANHUAPENGDESHENGZHANGJILI,ZAICHENGHEHESHENGZHANGDONGLIXUEFANGMIANYOUYIDINGDELEISIXING。”NANJINGHANGKONGHANGTIANDAXUEGUOWANLINYUANSHIPINGJIA,GAIYANJIUGAIBIANLERENMENDUIERWEIBINGCHENGHEHESHENGZHANGDECHUANTONGRENSHI,DUIYUCAILIAOKEXUE、MOCAXUE、SHENGWUXUE、DAQIKEXUEYIJIXINGXINGKEXUEDENGLINGYUDEYANJIUYOUZHONGYAOYIYI。

ZHONGGUOKEXUEJISHUDAXUEYANGJINLONGYUANSHIRENWEI,GAIYANJIUTUPOSHIYANTIAOZHAN,BUHUOLEERWEIBINGSHENGZHANGGUOCHENGZHONGDEBIANJIEYUANZIJIEGOU,JIEHELILUNJISUANMONI,JIESHILEERWEIBINGDESHENGZHANGJIZHI,WEIRENMENLIJIESHOUXIANKONGJIANLIBINGDESHENGZHANGHEXINGTAITIGONGLEXINSHIJIAO,JUYOUZHONGYAODEKEXUEYIYI。

AG奔驰宝马多人版 BENWENZHUANZAIZIHUANQIUWANG,NEIRONGJUNLAIZIYUHULIANWANG,BUDAIBIAOBENZHANGUANDIAN,NEIRONGGUISHUYUANZUOZHEJIZHANDIANSUOYOU,RUYOUDUININZAOCHENGYINGXIANG,QINGJISHILIANXIWOMENYUYISHANCHU!

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