å±×ƒ¸œå¤§å¦çŽ‹é‘«ç…œè¯¾é¢˜ç»„《Appl. Surf. Sci.》：(x¨¬)有机åŠå¯¼ä½“薄膜在自组装å•åˆ†å层修饰的金属表é¢ä¸Šçš„动力å¦ç”Ÿé•¿ç ”½I?/span>
2022-02-17 æ¥æº:ä¸å›½èšåˆç‰©ç½‘ 点击‹Æ?/span>
关键è¯ï¼š(x¨¬)有机åŠå¯¼ä½?/a> 薄膜
有机场效åº?/span>晶体½Ž?span>æ˜?/span>æœ‰æœºä¼ æ„Ÿå™¨ã€å˜å‚¨å™¨ä»¶å’ŒæŸ”性电(sh¨´)è·?span>½{‰æœ‰æœºç”µ(sh¨´)å器件的é‡è¦¾l„æˆéƒ¨åˆ†ã€?span>åœ?/span>有机场效åº?/span>晶体½Ž?span>ä¸ï¼Œè½½æµå以òqŒ™¡ŒäºŽåŸºåº•çš„æ–¹å‘ä¼ è¾“ä»¥èŽ·å¾—é«˜˜q移率。有机åŠå¯ég½“层ä¸é«˜åº¦æœ‰åºçš„分å结构是载æµåé«˜æ•ˆä¼ è¾“çš„å…³é”®åQŒå› æ¤è°ƒæŽ§æœ‰æœºåŠå¯ég½“有åºç”Ÿé•¿å¯¹åˆ¶å¤‡é«˜è´¨é‡æœ‰æœºç”?sh¨´)å器äšg臛_…³é‡è¦ã€?/span>
˜q‘æ—¥åQŒå±±ä¸œå¤§å¦çƒ¿U‘å¦ä¸Žå·¥½E‹ç ”½I¶ä¸å¿ƒçŽ‹é‘«ç…œè¯ùN¢˜¾l„在ã€?/span>Applied Surface Science》上å‘表了题ä¸?/span>â€?/span>Atomistic insights into dynamic growth of pentacene thin films on metal surfaces functionalized with self-assembled monolayersâ€çš„è®ºæ–‡ã€‚è¯¥è®ºæ–‡ç ”ç©¶äº†æœ‰æœºå°åˆ†ååŠå¯¼ä½“åƈ五苯åQ?/span>pentaceneåQ‰åœ¨ä¸åŒè‡ªç»„装å•åˆ†å层（SAMåQ‰ä¿®é¥°çš„金（AuåQ‰è¡¨é¢ä¸Šçš„动力å¦ç”Ÿé•¿è¡ŒäØ“(f¨´)åQŒäØ“(f¨´)有机ç”?sh¨´)å器äšg的制备æ供了é‡è¦çš„ç†è®ºæŒ‡å¯¹{€‚山东大å¦çƒ¿U‘å¦ä¸Žå·¥½E‹ç ”½I¶ä¸å¿ƒç¡•å£«ç ”½I¶ç”ŸçŽ‹ç»´éŸ¬äØ“(f¨´)论文½W¬ä¸€ä½œè€…ã€?/span>æ¤ç ”½I¶å¾—到国家自然科å¦åŸºé‡‘ç‰èµ„助支æŒã€?/span>
I SAM和粗¾p™åº¦å¯¹ç”Ÿé•¿çš„å½±å“
òq¶äº”苯分å在å…ç§ä¸åŒè¡¨é¢å½¢æ€ç»“构的基底表é¢åQˆå…‰æ»‘裸金ã€ç²—¾p™è£¸é‡‘ã€å…‰æ»?/span>SAM(-CH3)ã€å…‰æ»?/span>SAM(-COOH)ã€?/span>¾_—ç³™SAM(-CH3)å’?span>¾_—ç³™SAM(-COOH)åQ?/span>的沉¿U¯è¿‡½E?span>如图1所½C?/span>。在沉积åˆæœŸåQŒåƈ五苯分åä»?/span>òqŒ™hå½¢æ€å‡ºçŽ°åƈèšé›†åœ¨åŸºåº•ä¸Šã€‚在光滑裔R‡‘和粗¾p™è£¸é‡?/span>表é¢åQŒåƈ五苯分å˜q…é€?span>èšé›†åQŒéšç€æ²‰ç§¯˜q‡ç¨‹çš„进行呈çŽîC¸‰¾l´å²›çŠ¶ç”Ÿé•¿æ¨¡å¼ã€?span>ç ”ç©¶å‘现åQ?/span>ä¸åŒå®˜èƒ½å›¢çš„SAMä¼?x¨¬)媄å“åƈ五苯分åçš„åˆå§‹åˆ†å¸ƒï¼Œåœ¨å…‰æ?/span>SAM(-CH3)表é¢òq¶äº”苯分åå‡åŒ€åˆ†å¸ƒåQ?span>è€?/span>在光æ»?/span>SAM(-COOH)表é¢åˆ™å€‘֑于较早的形æˆæ™¶æ ¸ã€‚å°½½Ž¡åƈ五苯分åä»?span>òqŒ™¡ŒäºŽåŸºåº?/span>åQŒä½†æ˜?/span>SAMçš„åŠ å…?span>èƒ?/span>使åƈ五苯分åå–å‘æ›´åŠ æœ‰åºã€‚ç²—¾p?/span>SAM(-CH3)å’?/span>SAM(-COOH)表é¢æ²‰ç§¯¾l“果表明åQŒåƈ五苯分å在这两ç§è¡¨é¢ä¸Šå‡èƒ½åÅžæˆç›´ç«‹çš„分å层，而且¾_—ç³™SAM(-COOH)表é¢å½¢æˆäº†ä¸¤å±‚直立分å层åQŒæ›´æœ‰åˆ©äºŽåƈ五苯的生é•Ñ€?/span>
å›?/span>1 òq¶äº”苯在ä¸åŒåŸºåº•ä¸?/span>动力å?/span>生长˜q‡ç¨‹ã€?/span>
ç ”ç©¶˜q˜ç›‘‹¹‹äº†òq¶äº”苯分å在¾_—ç³™SAM(-CH3)å’?span>¾_—ç³™SAM(-COOH)表é¢ä¸?span>çš?/span>òq›_‡å€¾æ–œè§’和质心高度éšæ²‰¿U¯åˆ†åæ•°çš„å˜åŒ–（å›?/span>2åQ‰ã€‚éšç€æ²‰ç§¯åˆ†åæ•°çš„å¢žåŠ åQŒåœ¨ä¸¤ç§è¡¨é¢ä¸Šç¬¬ä¸€å±‚分å（ML1åQ?/span>çš„åã^å‡å€¾æ–œè§’从0?˜q…速å˜åŒ–到80?åQ?span>òq‰™šåŽä¿æŒç¨³å®šï¼Œ˜q™è¡¨æ˜?/span>ML1分åå‘生了é‡æ–°å®šå?span>åQ›è€Œä¸”在粗¾p?/span>SAM(-COOH)表é¢ä¸Šåƈ五苯形æˆäº†ç¬¬äºŒå±‚直立分åã€?/span>åŒæ—¶åQŒç›´ç«?span>晶体岛åÅžæˆ?span>åŽï¼Œæ¯å±‚的质心高åº?span>ä¿æŒä¸å˜åQ?/span>SAM(-COOH)表é¢ä¸Šä¸åŒåˆ†å层质心高度的å˜åŒ–说明åÅžæˆçš„òq¶äº”苯薄膜具有阶梯åŞ貌，˜q™ä¸Žæ–‡çŒ®ä¸åƈ五苯生长的实验结果一致ã€?/span>
å›?/span>2 åQ?/span>aåQ‰ç²—¾p?/span>SAM(-CH3)å’?/span>¾_—ç³™SAM(-COOH)表é¢ä¸Šä¸åŒåˆ†å层的åã^å‡å€¾æ–œè§’éšæ²‰ç§¯åˆ†åæ•°çš„å˜åŒ–。（båQ‰ç²—¾p?/span>SAM(-CH3)å’?/span>¾_—ç³™SAM(-COOH)表é¢ä¸Šä¸åŒåˆ†å层的质心高度éšæ²‰ç§¯åˆ†åæ•°çš„å˜åŒ–ã€?/span>
II 温度对生长的影å“
å¦å¤–åQŒåŸºåº?/span>温度也会(x¨¬)å¯?span>ä¸åŒè¡¨é¢ä¸Šçš„òq¶äº”è‹?/span>æˆæ ¸äº§ç”Ÿå½±å“ã€?span>较高çš?/span>温度ä¼?span>延迟两个¾_—ç³™SAM表é¢ä¸?/span>æ™¶æ ¸å‡ºçŽ°å’?span>é‡æ–°å®šå‘åQŒè¿™¿U现象在¾_—ç³™SAM(-CH3)表é¢æ›´äØ“(f¨´)明显ã€?span>ç ”ç©¶è®¡ç®—äº†ä¸åŒåŸºåº•æ¸©åº¦ä¸‹òq¶äº”苯分åé—´ç›æ€º’作用能（EPen-PenåQ?span>以åŠòq¶äº”è‹?span>å’?/span>SAM分å间相互作用能åQ?/span>EPen-SAMåQ‰çš„å˜åŒ–。如å›?/span>3所½Cºï¼Œå½“沉¿U¯åˆ†å超˜q‡ä¸€å®šæ•°é‡æ—¶åQ?/span>EPen-Penä¼?/span>急剧上å‡åQ?/span>EPen-SAMåˆ?span>出现åå¼¹åQŒè¯´æ˜Žä¸¤è€…é—´å‘生了能é‡äº¤æ¢ï¼›æ¤æ—¶òq¶äº”è‹¯æ™¶æ ¸å€¾æ–œè§?span>也éšä¹‹å‘生å˜åŒ–，˜q™å°±è¡¨æ˜Žòq¶äº”è‹?/span>-òq¶äº”苯和òq¶äº”è‹?/span>-SAM分å间的能é‡äº¤æ¢é©±åŠ¨äº?/span>æ™¶æ ¸è½¬å‘ã€?span>éšç€åŸºåº•æ¸©åº¦çš„å‡é«˜ï¼Œòq¶äº”è‹?/span>-òq¶äº”苯分åå’Œòq¶äº”è‹?/span>-SAM分å间的能é‡äº¤æ¢å‡ºçŽ°å»¶è¿ŸåQŒä½†æ™¶æ ¸çš„é‡æ–°å®šå‘过½E‹è¿›è¡Œæ›´å¿«ã€?/span>
å›?/span>3 åœ?/span>350åˆ?/span>500 K的基底温度下åQŒï¼ˆa-dåQ‰ç²—¾p?/span>SAM(-CH3)表é¢å’Œï¼ˆe-håQ‰ç²—¾p?/span>SAM(-COOH)表é¢ä¸Šï¼Œòq¶äº”苯分åé—´ç›æ€º’作用能（EPen-PenåQ‰ã€?/span>òq¶äº”è‹?/span>å’?/span>SAM分å间相互作用能åQ?/span>EPen-SAMåQ‰ä»¥åŠåÆˆäº”è‹¯æ™¶æ ¸òq›_‡å€¾æ–œè§’éšæ²‰ç§¯åˆ†åæ•°çš„å˜åŒ–ã€?/span>
III 自由能对生长的媄�/span>
ä¸ÞZº†æ示基底¾_—糙度对有机åŠå¯¼ä½“分å生长的影å“åQŒç ”½I¶è¿›ä¸€æ¥è®¡½Ž—了薄膜表é¢è‡ªç”±èƒ½ï¼ˆå›?/span>4åQ‰ã€‚结果表明，¾_—糙度会(x¨¬)引è“v表é¢è‡ªç”±èƒ½çš„å˜åŒ–åQŒä»Žè€Œè°ƒæŽ§äº†æœ‰æœºåŠå¯¼ä½“分å沉¿U¯çš„动力å¦è¡Œä¸ºã€‚åŒæ—Óž¼Œåœ¨åƈ五苯薄膜å°é˜¶è¾¹ç¼˜ä¸¤ä¾§å˜åœ¨å±€éƒ?/span>自由能的最大值和最ž®å€?span>åQŒè¿™ž®±åÅžæˆäº†Ehrlich-Schw?bel势垒。由于åƈ五苯的（0 0 1åQ‰å–å‘具有最ž®çš„能é‡åQ?span>å› æ¤æ²‰ç§¯åœ¨åŸºåº•ä¸Šçš„åƈ五苯分å更們֑于沿ç€èƒ½é‡å‡å°çš„èµ\径å‘å°é˜¶è¾¹ç¼˜¿UÕdŠ¨ä»?span>辑ֈ°æœ€½E›_®šçŠ¶æ€ï¼Œä¿ƒä‹Éäº?/span>òq¶äº”苯以åQ?/span>0 0 1åQ‰å–å‘ç›´ç«‹ä¾é™„在å°é˜¶è¾¹ç¼˜ã€‚åŒæ—Óž¼ŒEhrlich-Schw?bel势垒é˜È¢äº?/span>òq¶äº”苯分åè·¨‘?span>å°é˜¶è¾¹ç¼˜åQŒæ²‰¿U¯åœ¨ä¸åŒåˆ†å层上的åƈ五苯分ååªèƒ½åœ¨å½“å‰åˆ†å层¿UÕdŠ¨åQŒä¿ƒ˜q›äº†òq¶äº”苯阶æ¢?/span>形貌的åÅžæˆã€?/span>
å›?/span>4 ¾_—ç³™SAM(-COOH)åŸ?/span>åº?/span>ã€?/span>ML1å’?/span>ML2的表é¢è‡ªç”Þpƒ½åˆ†å¸ƒã€?/span>
作者简�/strong>
王鑫ç…?/span>åQŒå±±ä¸œå¤§å¦çƒ¿U‘å¦ä¸Žå·¥½E‹ç ”½I¶ä¸å¿ƒå‰¯æ•™æŽˆåQŒåšå£«ç”Ÿå¯¼å¸ˆåQŒä¸å›½å·¥½E‹çƒç‰©ç†å¦ä¼š(x¨¬)ä¼ çƒä¼ 质分会(x¨¬)é’年委员ä¼?x¨¬)委员，ä¸å›½å¤åˆææ–™å¦ä¼?x¨¬)导çƒå¤åˆæ料专业委员ä¼?x¨¬)委员，入选“山东大å¦é’òq´å¦è€…未æ¥è®¡åˆ’â€ã€‚主è¦ä»Žäº‹å¾®¾U›_°ºåº¦ä¼ çƒåŠèƒ½é‡è½¬æ¢ã€ç”µ(sh¨´)å器件烽Ž¡ç†ã€å¼ºåŒ–ä¼ çƒä¸ŽèŠ‚能技术ã€æ–°èƒ½æºå¼€å‘与利用½{‰é¢†åŸŸçš„ç ”ç©¶ã€‚å…ˆåŽä¸»æŒå›½å®¶è‡ªç„¶ç§‘å¦åŸºé‡‘ã€å±±ä¸œçœé‡ç‚¹ç ”å‘计划ã€å±±ä¸œçœè‡ªç„¶¿U‘å¦åŸºé‡‘½{‰å¤š™å¹å›½å®¶çñ”ã€çœéƒ¨çñ”™å¹ç›®åQ›åœ¨å›½å†…外é‡è¦å¦æœ¯æœŸåˆŠå‘è¡?/span>SCI论文50余篇åQŒå…¶ä¸?/span>6½‹‡è®ºæ–‡å…¥é€‰â€œå°é¢è®ºæ–‡â€ã€?/span>
原文链接
https://doi.org/10.1016/j.apsusc.2021.152203
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