²é¿´: 2006  |  »Ø¸´: 17
¡¾Óн±½»Á÷¡¿»ý¼«»Ø¸´±¾Ìû×Ó£¬²ÎÓë½»Á÷£¬¾ÍÓлú»á·ÖµÃ×÷Õß Ã¨ÓãÊÇÓã µÄ 46 ¸ö½ð±Ò £¬»ØÌû¾ÍÁ¢¼´»ñµÃ 1 ¸ö½ð±Ò£¬Ã¿ÈËÓÐ 1 ´Î»ú»á

yuan0806

Ìú¸Ëľ³æ (ÖøÃûдÊÖ)


[½»Á÷] ÏÄÓ×ÄÏ¿ÎÌâ×éÄÉÃ×îÙµÄÖÆ±¸

hydroquinone-based synthesis of pd nanostructures and the interplay of surface capping, reduction kinetics, attachment, diffusion, and fusion
»ùÓÚ¶Ô±½¶þ·ÓµÄ pd ÄÉÃ׽ṹµÄºÏ³ÉÒÔ¼°±íÃæ¸²¸Ç¡¢»¹Ô­¶¯Á¦Ñ§¡¢¸½×Å¡¢À©É¢ºÍÈںϵÄÏ໥×÷ÓÃ

abstract

the rational synthesis of nanostructured materials with desired properties calls for a thorough understanding of the growth mechanism. here we report a mechanistic case study of pd nanostructures synthesized by reducing a pd(ii) precursor with hydroquinone in the presence of kbr. as the reaction temperature was decreased from 100 to 20 ¡ãc, sub-10 nm cubes, concave nanocubes, and cube-like aggregates of much smaller particles were sequentially obtained. our time-lapse experiments and a set of controls indicated that primary particles of 1¨c4 nm in size were formed during the initial stage of the synthesis, followed by their aggregation into cube-like structures through an attachment process. in addition to the influence of surface capping, the reaction temperature played a vital role in determining the exact shape or morphology of the final products by affecting the reduction kinetics, fusion of the attached particles, and surface diffusion of atoms. at 100 ¡ãc, corresponding to a quick depletion of the pd(ii) precursor, the primary particles in each aggregate could easily fuse together to form nanocubes with flat faces owing to adequate surface diffusion. at 60 ¡ãc, the constituent particles also fused into cubes and then evolved into concave cubes through atomic deposition at the corners. at 20 ¡ãc, although fusion did not occur due to the substantially decreased diffusion rate, the primary particles in each aggregate still grew through atomic deposition for the formation of larger, cube-like aggregates. explicating the growth mechanism, this work offers a mechanistic understanding of the nonclassical growth mode involved in the formation of various metal nanostructures.

ºÏÀíºÏ³É¾ßÓÐËùÐèÌØÐÔµÄÄÉÃ׽ṹ²ÄÁÏÐèÒª¶ÔÉú³¤»úÖÆÓÐ͸³¹µÄÁ˽⡣ÔÚÕâÀÎÒÃDZ¨¸æÁËͨ¹ýÔÚ kbr ´æÔÚÏÂÓÃÇâõ«»¹Ô­ pd(ii) ǰÌåºÏ³ÉµÄ pd ÄÉÃ׽ṹµÄ»úе°¸ÀýÑо¿¡£Ëæ×Å·´Ó¦ÎÂ¶È´Ó 100¡ãc ½µµÍµ½ 20¡ãc£¬ÒÀ´Î»ñµÃÑÇ 10 nm Á¢·½Ìå¡¢°¼ÃæÄÉÃ×Á¢·½ÌåºÍСµÃ¶àµÄÁ¢·½Ìå×´¾Û¼¯Ìå¡£ÎÒÃǵÄÑÓʱʵÑéºÍÒ»×é¶ÔÕÕ±íÃ÷£¬Ôںϳɵijõʼ½×¶ÎÐγÉÁË 1-4 nm ´óСµÄ³õ¼¶Á£×Ó£¬È»ºóͨ¹ý¸½×Źý³Ì½«ËüÃǾۼ¯³ÉÁ¢·½Ìå×´½á¹¹¡£³ýÁ˱íÃæ·â¸ÇµÄÓ°ÏìÍ⣬·´Ó¦Î¶Èͨ¹ýÓ°Ï컹ԭ¶¯Á¦Ñ§¡¢¸½×ÅÁ£×ÓµÄÈںϺÍÔ­×ӵıíÃæÀ©É¢£¬ÔÚÈ·¶¨×îÖÕ²úÆ·µÄÈ·ÇÐÐÎ×´»òÐÎ̬·½ÃæÆð×ÅÖÁ¹ØÖØÒªµÄ×÷Óá£ÔÚ 100 ¡ãc ʱ£¬¶ÔÓ¦ÓÚ pd(ii) ǰÇýÌåµÄ¿ìËÙÏûºÄ£¬ÓÉÓÚ×ã¹»µÄ±íÃæÀ©É¢£¬Ã¿¸ö¾Û¼¯ÌåÖеijõ¼¶Á£×Ó¿ÉÒÔºÜÈÝÒ×µØÈÚºÏÔÚÒ»ÆðÐγɾßÓÐÆ½ÃæµÄÄÉÃ×Á¢·½Ìå¡£ÔÚ 60 ¡ãc ʱ£¬×é³ÉÁ£×ÓÒ²ÈںϳÉÁ¢·½Ì壬Ȼºóͨ¹ý½ÇÂä´¦µÄÔ­×Ó³Á»ýÑݱä³É°¼Á¢·½Ìå¡£ÔÚ 20 ¡ãc ʱ£¬ËäÈ»ÓÉÓÚÀ©É¢ËÙÂÊÏÔ׎µµÍ¶øÃ»Óз¢ÉúÈںϣ¬µ«Ã¿¸ö¾Û¼¯ÌåÖеijõ¼¶Á£×ÓÈÔȻͨ¹ýÔ­×Ó³Á»ýÉú³¤£¬ÒÔÐγɸü´óµÄÁ¢·½Ìå×´¾Û¼¯Ìå¡£½âÊÍÉú³¤»úÖÆ£¬ÕâÏ×÷ÌṩÁ˶Ը÷ÖÖ½ðÊôÄÉÃ׽ṹÐγÉËùÉæ¼°µÄ·Ç¾­µäÉú³¤Ä£Ê½µÄ»úеÀí½â¡£

ÏÄÓ×ÄÏ¿ÎÌâ×éÄÉÃ×îÙµÄÖÆ±¸

[ last edited by yuan0806 on 2021-10-26 at 08:59 ]

doi.org/10.1021/acs.chemmater.1c02791

https://pubs.acs.org/doi/10.1021 ... _ASAP_cmatex_v0_i0_

[ Last edited by yuan0806 on 2021-10-26 at 09:02 ]
»Ø¸´´ËÂ¥

» ²ÂÄãϲ»¶

» ±¾Ö÷ÌâÏà¹ØÉ̼ÒÍÆ¼ö: (ÎÒÒ²ÒªÔÚÕâÀïÍÆ¹ã)

» ÇÀ½ð±ÒÀ²£¡»ØÌû¾Í¿ÉÒԵõ½:

²é¿´È«²¿É¢½ðÌù

ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

leyan2006

ÖÁ×ðľ³æ (ÖøÃûдÊÖ)


¡ï
yuan0806(½ð±Ò+1): лл²ÎÓë
8Â¥2021-10-26 07:17:09
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

С¹Ҫ·Éѽ

гæ (СÓÐÃûÆø)


10Â¥2021-10-26 12:21:14
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

bachier

½ð³æ (Ö°Òµ×÷¼Ò)


¡ï
yuan0806(½ð±Ò+1): лл²ÎÓë
Ó¦¸Ã¶à³ö´ó×÷£¬ÒýÁìһϣ¬·½Ïò¿ìËÀÁË

·¢×ÔСľ³æAndroid¿Í»§¶Ë
17Â¥2021-11-09 13:35:25
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû
¼òµ¥»Ø¸´
tzynew2Â¥
2021-10-25 09:45   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
o ·¢×ÔСľ³æAndroid¿Í»§¶Ë
2021-10-25 10:11   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
·¢×ÔСľ³æAndroid¿Í»§¶Ë
2021-10-25 11:24   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
2021-10-25 11:34   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
nono20096Â¥
2021-10-25 13:01   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
`
2021-10-26 00:25   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
·¢×ÔСľ³æAndroid¿Í»§¶Ë
shawxz20129Â¥
2021-10-26 07:52   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
·¢×ÔСľ³æAndroid¿Í»§¶Ë
gter_wang11Â¥
2021-10-26 13:14   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
BRUCE18212Â¥
2021-10-26 16:12   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
miaojiabing13Â¥
2021-10-27 09:14   »Ø¸´  
psylhh14Â¥
2021-10-31 22:00   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
2021-11-01 08:36   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
·¢×ÔСľ³æIOS¿Í»§¶Ë
bjdxyxy16Â¥
2021-11-01 11:43   »Ø¸´  
yuan0806(½ð±Ò+1): лл²ÎÓë
¡£ ·¢×ÔСľ³æAndroid¿Í»§¶Ë
bjdxyxy18Â¥
Ïà¹Ø°æ¿éÌø×ª ÎÒÒª¶©ÔÄÂ¥Ö÷ èÓãÊÇÓã µÄÖ÷Ìâ¸üÐÂ
Ìáʾ: Èç¹ûÄúÔÚ30·ÖÖÓÄڻظ´¹ýÆäËûÉ¢½ðÌù£¬Ôò¿ÉÄÜÎÞ·¨ÁìÈ¡´ËÌù½ð±Ò
×î¾ßÈËÆøÈÈÌûÍÆ¼ö [²é¿´È«²¿] ×÷Õß »Ø/¿´ ×îºó·¢±í
[¿¼ÑÐ] ѧ˶285Çóµ÷¼Á +13 Wisjxn 2026-03-12 46/2300 2026-03-14 10:33 by JourneyLucky
[¿¼ÑÐ] 0703»¯Ñ§308·Ö£¬ËÄÁù¼¶Òѹý£¬Çóµ÷¼Á +3 ¹¾¹¾¹¾¹¾¹¾¹¾¹¾¹ 2026-03-07 3/150 2026-03-14 05:29 by JourneyLucky
[¿¼ÑÐ] 26¿¼ÑÐÇóµ÷¼ÁbÇø¸ßУ +3 ±±Ä°×·Ñ© 2026-03-08 4/200 2026-03-14 03:47 by JourneyLucky
[¿¼ÑÐ] 310 070300»¯Ñ§Çóµ÷¼Á +5 ÆË·çÁåµÄè 2026-03-08 6/300 2026-03-14 03:22 by JourneyLucky
[¿¼ÑÐ] 308Çóµ÷¼Á +3 ÊÇLupa°¡ 2026-03-09 3/150 2026-03-14 02:55 by JourneyLucky
[¿¼ÑÐ] Ò»Ö¾Ô¸Õã½­´óѧ0856²ÄÁÏÓ뻯¹¤Çóµ÷¼Á +4 yansheng@211 2026-03-09 5/250 2026-03-14 02:10 by JourneyLucky
[¿¼ÑÐ] Ò»Ö¾Ô¸»ªÖÐũҵ´óѧ071010£¬×Ü·ÖÈý°Ù¶þ,Çóµ÷¼Á +3 À§À§À§À§À¤À¤ 2026-03-10 3/150 2026-03-14 00:35 by JourneyLucky
[¿¼ÑÐ] Çóµ÷¼Á£¬Ò»Ö¾Ô¸½­ÄÏ´óѧ»·¾³¹¤³Ì085701 +3 Djdjj12 2026-03-10 4/200 2026-03-14 00:31 by JourneyLucky
[¿¼ÑÐ] 26¿¼Ñе÷¼Á +3 ying123. 2026-03-10 3/150 2026-03-14 00:18 by JourneyLucky
[¿¼ÑÐ] Çóµ÷¼Á£¨²ÄÁÏÓ뻯¹¤327£© +4 °®³ÔÏã²ËÀ² 2026-03-11 4/200 2026-03-13 22:11 by JourneyLucky
[¿¼ÑÐ] 290Çóµ÷¼Á +9 ADT 2026-03-11 9/450 2026-03-13 21:55 by JourneyLucky
[¿¼ÑÐ] £¨081700£©»¯Ñ§¹¤³ÌÓë¼¼Êõ-298·ÖÇóµ÷¼Á +12 11À²À²À² 2026-03-11 35/1750 2026-03-13 21:25 by JourneyLucky
[¿¼ÑÐ] 26µ÷¼Á/²ÄÁÏ¿ÆÑ§Ó빤³Ì/×Ü·Ö295/ÇóÊÕÁô +9 2026µ÷¼ÁÏÀ 2026-03-12 9/450 2026-03-13 20:46 by 18595523086
[¿¼ÑÐ] 0856»¯¹¤Ô­Àí +6 z2839474511 2026-03-10 6/300 2026-03-13 10:41 by houyaoxu
[¿¼²©] ¸£ÖÝ´óѧÑî»ÆºÆ¿ÎÌâ×éÕÐÊÕ2026Äêרҵѧλ²©Ê¿Ñо¿Éú£¬2026.03.20½ØÖ¹ +3 Xiangyu_ou 2026-03-12 3/150 2026-03-13 09:36 by duanwu655
[»ù½ðÉêÇë] ¹ú×Ô¿ÆÃæÉÏ»ù½ð×ÖÌå +3 iwuli 2026-03-12 3/150 2026-03-12 22:43 by lfy8008
[¿¼ÑÐ] 420Çóµ÷¼Á +4 ĪÏòÍâÇó11 2026-03-10 6/300 2026-03-12 14:41 by ruiyingmiao
[¿¼ÑÐ] ±êÌâ:¼ñ©Ԥ¾¯|08¹¤¿Æ/09ũѧµ÷¼Á!Ó¢ÓïÒªÇóµÍ£¬¹ýÏß¼´Óлú»á! +9 Âí³¬·ÅÑÌ»¨ 2026-03-07 15/750 2026-03-12 14:07 by Âí³¬·ÅÑÌ»¨
[¿¼ÑÐ] ´óÁ¬´óѧ»¯Ñ§×¨ÒµÑо¿Éúµ÷¼Á +3 ç÷¾Ã. 2026-03-10 8/400 2026-03-11 10:02 by ç÷¾Ã.
[¿¼ÑÐ] »¯¹¤0817µ÷¼Á +8 ²ÓÈôÐdz¿ 2026-03-10 8/400 2026-03-10 22:44 by ÐÇ¿ÕÐÇÔÂ
ÐÅÏ¢Ìáʾ
ÇëÌî´¦ÀíÒâ¼û