{"id":71636,"date":"2017-03-19T06:30:18","date_gmt":"2017-03-18T22:30:18","guid":{"rendered":"\/\/m.iemloyee.com\/?p=71636"},"modified":"2017-03-16T23:05:03","modified_gmt":"2017-03-16T15:05:03","slug":"nature%e5%ad%90%e5%88%8a%ef%bc%9a%e5%87%86%e8%87%aa%e7%94%b1%e6%80%81%e9%93%be%e7%8a%b6%e8%81%9a%e5%90%88%e7%89%a9%e5%88%b0%e7%9f%b3%e5%a2%a8%e7%83%af%e7%ba%b3%e7%b1%b3%e5%b8%a6%e7%9a%84%e5%8f%af","status":"publish","type":"post","link":"\/\/m.iemloyee.com\/?p=71636","title":{"rendered":"Nature\u5b50\u520a\uff1a\u51c6\u81ea\u7531\u6001\u94fe\u72b6\u805a\u5408\u7269\u5230\u77f3\u58a8\u70ef\u7eb3\u7c73\u5e26\u7684\u53ef\u63a7\u8f6c\u53d8"},"content":{"rendered":"

\u00a0<\/h2>\n

\u3010\u5f15\u8a00\u3011<\/strong><\/p>\n

\u80fd\u591f\u5bf9\u77f3\u58a8\u70ef\u7eb3\u7c73\u5e26(GNRs)\u7684\u5f62\u8c8c\u4e0e\u5927\u5c0f\u8fdb\u884c\u7cbe\u51c6\u8c03\u63a7\u662f\u77f3\u58a8\u70ef\u57fa\u7535\u5b50\u5668\u4ef6\u5b9e\u73b0\u5c0f\u578b\u5316\u3001\u6a21\u5757\u5316\u3001\u96c6\u6210\u5316\u7684\u5173\u952e\u56e0\u7d20\u4e4b\u4e00\u3002\u4e0d\u540c\u5bbd\u5ea6\u548c\u8fb9\u754c\u6001\u7684GNRs\u53ef\u5728Au, Ag, Cu\u886c\u5e95\u4e0a\u5229\u7528\u524d\u9a71\u4f53\u53d1\u751f\u73af\u5316\u8131\u6c22\u5408\u6210\u3002\u4f8b\u5982\uff0c\u4ee5\u81ea\u7ec4\u88c5\u7ebf\u6027\u805a\u5408\u7269\u4e3a\u4e2d\u95f4\u4f53\uff0c\u5229\u7528\u81ea\u4e0b\u800c\u4e0a\u7684\u5408\u6210\u6cd5\u5728\u886c\u5e95\u4e0a\u5408\u6210GNRs\u3002<\/p>\n

\u3010\u6210\u679c\u7b80\u4ecb\u3011<\/strong><\/p>\n

\u6765\u81ea\u6a61\u6811\u5cad\u56fd\u5bb6\u5b9e\u9a8c\u5ba4\u7684\u674e\u5b89\u5e73\u7814\u7a76\u5458\uff08\u901a\u8baf\u4f5c\u8005<\/strong>\uff09\u8bfe\u9898\u7ec4\uff0c\u8fd1\u65e5\u5728Nature Communications\u4e0a\u53d1\u8868\u4e86\u9898\u4e3aControllable conversion of quasi-freestanding polymer chains to graphene nanoribbons\u7684\u6587\u7ae0\uff0c\u4ed6\u4eec\u5229\u7528\u626b\u63cf\u96a7\u9053\u663e\u5fae\u955c(STM)\u63a2\u9488\u5b9e\u73b0\u4e86\u51c6\u81ea\u7531\u6001\u805a\u5408\u7269\u53ef\u63a7\u5730\u8f6c\u53d8\u4e3aGNRs\u3002\u8fd9\u4e00\u6280\u672f\u4e3aGNRs\u7684\u7ed3\u6784\u8bbe\u8ba1\u6307\u660e\u4e86\u4e00\u6761\u65b0\u7684\u9053\u8def\uff0c\u5e76\u5bf9\u77f3\u58a8\u70ef\u7eb3\u7c73\u5e26\u57fa\u7eb3\u7c73\u5668\u4ef6\u7684\u5b9e\u9645\u5e94\u7528\u4ea7\u751f\u91cd\u8981\u5f71\u54cd\u3002<\/p>\n

\u3010\u56fe\u6587\u5bfc\u8bfb\u3011<\/strong><\/p>\n

\u56fe<\/strong> 1 <\/strong>\u5728<\/strong>7<\/strong>\u4e2a\u78b3\u539f\u5b50\u5bbd\u5ea6\u7684<\/strong>GNRs(7-aGNRs)<\/strong>\u4e0a\u81ea\u4e0b\u800c\u4e0a\u5408\u6210\u805a\u5408\u7269\u94fe<\/strong><\/p>\n

\"\"<\/p>\n

(a) \u5728\u7b2c\u4e00\u5c427-aGNRs\u4e0a\u768410\uff0c10\u2019-\u4e8c\u6eb4-9,9\u2019-\u8054\u84bd\u5728470K\u548c670K\u4e0b\u9010\u6b65\u9000\u706b\u5f62\u6210\u7b2c\u4e8c\u5c42\u7684\u805a\u84bd\u94fe\u793a\u610f\u56fe\u3002<\/p>\n

(b) 7-aGNRs\u4e0a\u7684\u805a\u5408\u7269\u7684\u5927\u9762\u79efSTM\u56fe\u50cf(\u6837\u54c1\u7535\u538bV<\/em>s <\/sub>= -2 V,\u96a7\u9053\u7535\u6d41I<\/em>t <\/sub>= 60 pA)\uff0c\u6807\u5c3a20 nm\u3002<\/p>\n

(c) \u7b2c\u4e00\u5c427-aGNRs\u539f\u5b50\u53e0\u52a0\u7ed3\u6784\u7684\u9ad8\u5206\u8fa8\u7387STM\u56fe\u50cf(V<\/em>s <\/sub>= -0.6 V, I<\/em>t <\/sub>= 100 pA)\uff0c\u6807\u5c3a1 nm\u3002<\/p>\n

(d) \u7b2c\u4e8c\u5c42\u805a\u5408\u7269\u94fe\u7684\u5c0f\u5c3a\u5ea6STM\u56fe\u50cf(V<\/em>s <\/sub>= +1 V, I<\/em>t <\/sub>= 60 pA)\uff0c\u6807\u5c3a2 nm\u3002<\/p>\n

(e) \u6a21\u62df\u7684STM\u56fe\u50cf\u548c\u805a\u5408\u7269\u7684\u539f\u5b50\u7ed3\u6784\u8986\u76d6\u4e8e(d)\u56fe\u9876\u90e8\u805a\u5408\u7269\u94fe\u7684\u653e\u5927\u56fe\u50cf\u4e0a\uff0c\u6807\u5c3a1 nm\u3002<\/p>\n

(f) \u9ad8\u5206\u8fa8\u7387STM\u56fe\u50cf\u5448\u73b0\u7684\u805a\u5408\u7269\u8be6\u7ec6\u7ed3\u6784(V<\/em>s <\/sub>= -2 V, I<\/em>t <\/sub>= 10 pA)\uff0c\u6807\u5c3a 2 nm\u3002<\/p>\n

(g) \u805a\u5408\u7269\u7684\u6700\u9ad8\u5360\u636e\u6676\u4f53\u8f68\u9053(HOCOp)\u7684\u7535\u8377\u5206\u5e03\u3002\u865a\u7ebf\u6846\u6807\u793a\u805a\u5408\u7269\u4e2d\u7684\u805a\u5408\u7269\u5355\u5143\u3002<\/p>\n

\u56fe<\/strong> 2 <\/strong>\u70ed\u8bf1\u5bfc\u73af\u5316\u8131\u6c22\u5f15\u8d77\u7684\u7c7b\u591a\u7c73\u8bfa\u6548\u5e94<\/strong><\/p>\n

\"\"<\/p>\n

(a) \u767d\u8272\u7bad\u5934\u6240\u6307\u4e3a\u7b2c\u4e8c\u5c42\u805a\u5408\u7269\u53ca\u7b2c\u4e8c\u5c427-aGNRs(V<\/em>s <\/sub>= -2 V, I<\/em>t <\/sub>= 100 pA)\uff0c\u6807\u5c3a 5 nm\u3002<\/p>\n

(b) dI<\/em>\/dV<\/em> \u4ee3\u8868\u5fae\u5206\u7535\u5bfc\uff0c\u56fe\u4e2d\u66f2\u7ebf\u7531\u56fe(a)\u4e2d\u201cx\u201d\u6807\u793a\u76841-4\u56db\u4e2a\u4f4d\u7f6e\u5f97\u5230(V<\/em>s <\/sub>= -2 V, I<\/em>t <\/sub>= 100 pA)\u3002\u805a\u5408\u7269\u7684\u6700\u9ad8\u5360\u636e\u6676\u4f53\u8f68\u9053(HOCOp<\/sub>)\u548c\u6700\u4f4e\u672a\u5360\u636e\u6676\u4f53\u8f68\u9053(LUCOp<\/sub>)\u5206\u522b\u4e3a-2.1eV\u548c+2.2eV\u3002\u7b2c\u4e8c\u5c42GNRs\u7684\u6700\u9ad8\u5360\u636e\u6676\u4f53\u8f68\u9053(HOCOg<\/sub>)\u548c\u6700\u4f4e\u672a\u5360\u636e\u6676\u4f53\u8f68\u9053(LUCOg<\/sub>)\u5206\u522b\u4e3a-1.0eV\u548c+1.6eV\uff0c\u800c\u7b2c\u4e00\u5c42\u4e3a-0.9eV\u548c+1.4eV\u3002<\/p>\n

(c) STM\u56fe\u50cf\u663e\u793aGNRs\u5c3e\u90e8\u4e0e\u805a\u5408\u7269\u94fe\u6709\u5e26\u5185\u5f02\u8d28\u7ed3(V<\/em>s <\/sub>= -2 V, I<\/em>t <\/sub>= 100 pA)\uff0c\u6b63\u5982\u793a\u610f\u56fe\u6240\u793a\uff0c\u6807\u5c3a 5 nm\u3002<\/p>\n

(d) \u70ed\u9000\u706b\u8fc7\u7a0b\u4e2d\u805a\u5408\u7269\u73af\u5316\u8131\u6c22\u7684\u7c7b\u591a\u7c73\u8bfa\u6548\u5e94\u793a\u610f\u56fe\u3002\u6bcf\u4e00\u53cd\u5e94\u6b65\u9aa4\u4e2d\u7684\u6c22\u539f\u5b50\u88ab\u6807\u51fa\u3002<\/p>\n

\u56fe <\/strong>3 <\/strong>\u7531\u96a7\u9053\u7535\u5b50\u8bf1\u5bfc\u7684\u805a\u5408\u7269\u94fe\u4e2d\u7684<\/strong>GNR<\/strong>\u7247\u6bb5\u7684\u5f62\u6210<\/strong><\/p>\n

\"\"<\/p>\n

(a) \u7b2c\u4e8c\u5c42\u805a\u5408\u7269\u94fe\u7684STM\u56fe\u50cf(V<\/em>s <\/sub>= -2 V, I<\/em>t <\/sub>= 60 pA)\u3002<\/p>\n

(b) dI<\/em>\/dV<\/em> \u5fae\u5206\u7535\u5bfc\u66f2\u7ebf\u56fe\uff0c\u66f2\u7ebf\u7531\u56fe(a)\u4e2d\u6cbf\u7ea2\u7bad\u5934\u65b9\u5411\u7b49\u5206\u7684\u5341\u4e2a\u70b9(1-10)\u53d6\u5f97(V<\/em>s <\/sub>= -2 V, I<\/em>t <\/sub>= 60 pA)\u3002\u70b91-7\u5728\u805a\u5408\u7269\u94fe\u4e0a\uff0c\u70b98-10\u5728\u7b2c\u4e00\u5c42GNR\u4e0a\u3002\u5728\u66f2\u7ebf1-3\u4e2d\u7684\u9ed1\u8272\u865a\u7ebf\u6807\u793aLUCOp\uff1b\u7ea2\u8272\u865a\u7ebf\u6807\u793a\u7684\u66f2\u7ebf4-7\u4e0e\u7b2c\u4e00\u5c42GNR\u7684\u66f2\u7ebf8-10\u6709\u7740\u4e00\u81f4\u7684LUCOg\u3002<\/p>\n

(c) STM\u56fe\u50cf\u663e\u793a\u5728\u805a\u5408\u7269\u94fe\u7684\u9876\u7aef\u5f62\u6210\u7684GNR\u7247\u6bb5(V<\/em>s <\/sub>= +1.7 V, I<\/em>t <\/sub>= 60 pA; \u767d\u8272\u65b9\u6846\uff09\u3002<\/p>\n

(d) dI<\/em>\/dV<\/em> \u56fe\u8c31(V<\/em>s <\/sub>= +1.7 V, I<\/em>t <\/sub>= 60 pA)\uff0c\u6d4b\u8bd5\u533a\u57df\u4e3a\u56fe(c)\u3002<\/p>\n

(e) dI<\/em>\/dV<\/em> \u5fae\u5206\u7535\u5bfc\u66f2\u7ebf\u56fe\uff0c\u66f2\u7ebf\u7531\u56fe(c)\u4e2d\u6cbf\u7ea2\u7bad\u5934\u65b9\u5411\u7b49\u5206\u7684\u516b\u4e2a\u70b9(1-8)\u53d6\u5f97\u3002\u70b91\u548c8\u57287-aGNRs\u4e0a\uff0c\u70b92-7\u5728\u805a\u5408\u7269\u94fe\u4e0a\u3002\u5728\u66f2\u7ebf2\u548c3\u4e2d\u7684\u9ed1\u8272\u865a\u7ebf\u6807\u793aLUCOp\uff1b\u7ea2\u8272\u865a\u7ebf\u6807\u793a\u7684\u66f2\u7ebf4-7\u4e0e\u7b2c\u4e00\u5c42GNR\u7684\u66f2\u7ebf1\u548c8\u6709\u7740\u4e00\u81f4\u7684\u6700\u4f4e\u672a\u5360\u636e\u6676\u4f53\u8f68\u9053\u3002<\/p>\n

(f) \u56fe(c)\u4e2d\u9ed1\u8272\u65b9\u6846\u533a\u57df\u7684STM\u56fe\u50cf\uff0c\u8be5\u56fe\u4e2d\u767d\u8272\u65b9\u6846\u5185\u4e3a\u7f3a\u9677(V<\/em>s <\/sub>= -2 V, I<\/em>t <\/sub>= 60 pA)\u3002\u56fe(a)\uff0c(c)\uff0c(f)\u4e2d\u7684\u793a\u610f\u56fe\u8868\u793aSTM\u63a2\u9488\u64cd\u4f5c\u524d\u540e\u805a\u5408\u7269\u94fe\u7684\u53d8\u5316\u3002<\/p>\n

(g) \u56fe(f)\u4e2d\u6cbf\u865a\u7ebf\u65b9\u5411\u805a\u5408\u7269\u94fe\u7684\u8f6e\u5ed3<\/p>\n

(h) \u5d4c\u5165\u6709\u77edGNR\u7247\u6bb5\u7684\u805a\u5408\u7269\u94fe\u7684\u539f\u5b50\u7ed3\u6784\u3002<\/p>\n

(i)\u548c(j) dI<\/em>\/dV<\/em> \u56fe\u8c31(V<\/em>s<\/sub>=+1.7V\u548cV<\/em>s<\/sub>=-2.0V)\uff0c\u6d4b\u8bd5\u533a\u57df\u4e3a\u56fe(f)\u3002<\/p>\n

(k)\u548c(l) \u5728V<\/em>s<\/sub>=+0.5 V (k) \u548cV<\/em>s<\/sub>=-1 V (l)\u65f6\uff0cGNRs\u5e26\u5185\u5f02\u8d28\u7ed3\u7684\u7535\u8377\u5206\u5e03\u3002\u56fe\u4e2d\u6240\u6709\u6807\u5c3a\u4e3a2 nm\u3002<\/p>\n

\u56fe <\/strong>4 <\/strong>\u7531<\/strong>STM<\/strong>\u63a2\u9488\u8bf1\u5bfc\u7684\u7a7a\u7a74\u8f85\u52a9\u73af\u5316\u8131\u6c22\u7684\u673a\u7406<\/strong><\/p>\n

\"\"<\/p>\n

(a) \u5c06\u7a7a\u7a74\u8109\u51b2\u5e94\u7528\u4e8e\u805a\u5408\u7269\u94fe\u7684\u793a\u610f\u56fe\u3002<\/p>\n

(b) \u5728\u53cd\u9988\u56de\u8def\u5173\u95ed\u65f6\u7531\u8109\u51b2\u5f15\u8d77\u7684\u4e09\u6761\u5178\u578b\u7684\u96a7\u9053\u7535\u6d41-\u65f6\u95f4\u66f2\u7ebf\u3002\u56fe\u4e2d\u66f2\u7ebf\u7684\u4e09\u4e2a\u9636\u8dc3\u4f4d\u7f6e\u5206\u522b\u6807\u4e3a1-3\u3002STM\u56fe\u50cf\u5728\u805a\u5408\u7269\u94fe\u4e2d\u5f62\u6210GNR\u7247\u6bb5\uff08\u7ea2\u8272\u7bad\u5934\uff09\u3002<\/p>\n

(c) \u63d0\u51fa\u7684\u73af\u5316\u8131\u6c22\u53cd\u5e94\u8def\u5f84\uff0c\u4ee51\u4e3a\u521d\u59cb\uff0c2\u4e3a\u5355\u4fa7\u73af\u5316\u8131\u6c22\u53cd\u5e94\uff0c3\u5f62\u6210GNRs\uff0c\u800cint1-int4\u4e3a\u4e2d\u95f4\u8fc7\u6e21\u6001\u3002<\/p>\n

(d) \u5728\u771f\u7a7a\u72b6\u6001\u4e0b\uff0c\u7535\u4e2d\u6027(\u9ed1\u8272)\uff0c\u53cc\u7535\u5b50(\u7eff\u8272)\uff0c\u53cc\u7a7a\u7a74(\u7ea2\u8272)\u8f85\u52a9\u7684\u53cc\u84bd\u73af\u5316\u8131\u6c22\u80fd\u91cf\u56fe\u3002<\/p>\n

(e) LUCOp<\/sub>\u548cHOCOp<\/sub>\u7535\u8377\u5bc6\u5ea6\u5206\u5e03\u6a21\u62df\u56fe\uff0c\u7ea2\u8272\u548c\u84dd\u8272\u4ee3\u8868\u4e0d\u540c\u6ce2\u51fd\u6570\u3002\u7ea2\u8272\u7bad\u5934\u6807\u793aLUCOp<\/sub>\u4e2d\u7684\u5f02\u76f8\u91cd\u53e0\uff08\u4e0d\u540c\u6ce2\u51fd\u6570\u53e0\u52a0\uff09\uff0c\u84dd\u8272\u7bad\u5934\u6807\u793aHOCOp<\/sub>\u4e2d\u7684\u540c\u76f8\u91cd\u53e0\uff08\u76f8\u540c\u6ce2\u51fd\u6570\u53e0\u52a0\uff09\uff1b\u8fd9\u4e8c\u8005\u8868\u660e\u5728\u73af\u5316\u8131\u6c22\u5f62\u6210C-C\u952e\uff0c\u5728LUCOp<\/sub>\u4e0a\u662f\u5bf9\u79f0\u7981\u963b\u7684\uff0c\u5728HOCOp<\/sub>\u4e0a\u662f\u5bf9\u79f0\u5141\u8bb8\u7684\u3002<\/p>\n

\u3010\u5c0f\u7ed3\u3011<\/strong><\/p>\n

\u672c\u6587\u4f5c\u8005\u5229\u7528STM\u63a2\u9488\u5b9e\u73b0\u4e86\u81ea\u4e0b\u800c\u4e0a\u5236\u5907GNRs\u65b0\u65b9\u6cd5\uff0c\u8fd9\u4e00\u5236\u5907\u8fc7\u7a0b\u53ef\u901a\u8fc7\u8c03\u8282\u63a2\u9488\u8f93\u51fa\u7535\u8377\u7684\u6570\u91cf\u4e0e\u7535\u6027\u8fdb\u884c\u63a7\u5236\u3002\u5229\u7528\u7b2c\u4e00\u6027\u539f\u7406\u8ba1\u7b97\u4e0e\u5b9e\u9a8c\u9a8c\u8bc1\uff0c\u4f5c\u8005\u53d1\u73b0\u5229\u7528STM\u63a2\u9488\u7a7a\u7a74\u6ce8\u5165\u53ef\u4ee5\u4f7f\u5f97\u51c6\u81ea\u7531\u6001\u7684\u805a\u5408\u7269\uff08\u91d1\u5c5e\u57fa\u5e95\u7684\u50ac\u5316\u4f5c\u7528\u88ab\u6d88\u9664\uff09\u53d1\u751f\u73af\u5316\u8131\u6c22\u7684\u7c7b\u591a\u7c73\u8bfa\u6548\u5e94\u3002\u8fd9\u4e00\u53cd\u5e94\u8fc7\u7a0b\u7b26\u5408\u4f0d\u5fb7\u6c83\u5fb7 – \u970d\u592b\u66fc\u89c4\u5219\uff1a\u5f53\u7a7a\u7a74\u6ce8\u5165\u65f6\u662fC-C\u952e\u7684\u5f62\u6210\u662f\u5bf9\u79f0\u5141\u8bb8\u7684\uff0c\u5f53\u7535\u5b50\u6ce8\u5165\u65f6\u662f\u5bf9\u79f0\u7981\u963b\u7684\u3002\u91d1\u5c5e\u57fa\u50ac\u5316\u4f5c\u7528\u88ab\u6d88\u9664\u540e\uff0cSTM\u63a2\u9488\u4ecd\u53ef\u4f7f\u805a\u5408\u7269\u524d\u9a71\u4f53\u5728\u4efb\u610f\u4f4d\u70b9\u77f3\u58a8\u5316\u3002\u8fd9\u662f\u53ef\u63a7\u7684\uff0c\u81ea\u4e0b\u800c\u4e0a\u7684\u5236\u5907GNRs\u548c\u5f02\u8d28\u7ed3\u7684\u65b0\u65b9\u6cd5\u3002<\/p>\n

\u6587\u732e\u94fe\u63a5<\/strong>: <\/strong>Controllable conversion of quasi-freestanding polymer chains to graphene nanoribbons.<\/span><\/a>\u00a0 \u00a0(Nat. Commun.\uff0c2017\uff0cDOI: 10.1038\/ncomms14815)<\/p>\n

\u8be5\u6587\u732e\u6c47\u603b\u7531\u6750\u6599\u4eba\u7f16\u8f91\u90e8\u7eb3\u7c73\u5b66\u672f\u7ec4Mr_PSP \u4f9b\u7a3f\uff0c\u6750\u6599\u725b\u7f16\u8f91\u6574\u7406\u3002<\/p>\n

\u6750\u6599\u725b\u7f51\u4e13\u6ce8\u4e8e\u8ddf\u8e2a\u6750\u6599\u9886\u57df\u79d1\u6280\u53ca\u884c\u4e1a\u8fdb\u5c55\uff0c\u8fd9\u91cc\u6c47\u96c6\u4e86\u5404\u5927\u9ad8\u6821\u7855\u535a\u751f\u3001\u4e00\u7ebf\u79d1\u7814\u4eba\u5458\u4ee5\u53ca\u884c\u4e1a\u4ece\u4e1a\u8005\uff0c\u5982\u679c\u60a8\u5bf9\u4e8e\u8ddf\u8e2a\u6750\u6599\u9886\u57df\u79d1\u6280\u8fdb\u5c55\uff0c\u89e3\u8bfb\u9ad8\u6c34\u5e73\u6587\u7ae0\u6216\u662f\u8bc4\u8ff0\u884c\u4e1a\u6709\u5174\u8da3\uff0c\u70b9\u6211\u52a0\u5165\u7f16\u8f91\u90e8<\/a>\u3002<\/span><\/span><\/p>\n

\u6750\u6599\u4eba\u7f51\u5c0a\u91cd\u6240\u6709\u8fdb\u884c\u77e5\u8bc6\u4f20\u64ad\u7684\u5a92\u4f53\uff0c\u8f6c\u8f7d\u8bf7\u8054\u7cfbtougao@cailiaoren.com<\/p>\n

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