24小时热门版块排行榜    

北京石油化工学院2026年研究生招生接收调剂公告
查看: 871  |  回复: 12

tl-tomorrow

实习版主

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!


[交流] 纳米材料三角形片状的生成机理

有人了解为什么片状纳米材料长成正三角形的机理吗?我看到很多化学气相沉积得到的是三角形的片。我自己做的一些团簇也有组装成三角形的片,也有成矩形的片。
回复此楼

» 猜你喜欢

» 本主题相关商家推荐: (我也要在这里推广)

» 抢金币啦!回帖就可以得到:

查看全部散金贴

已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
回帖支持 ( 显示支持度最高的前 50 名 )

tl-tomorrow

兑换贵宾

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!


When a single twin plane is formed, the resulting nucleus, at the early stage of growth, is a hexagonal plate due to the 6-fold symmetry of fcc structures (Figure 13). Each side of the hexagon is either a concave side or a convex side because of the presence of a twin plane. When atoms diffuse toward the nucleus and adsorb to grow the NC, they can adsorb either on a concave or on a convex face. On the convex side, each atomic site has only three closest neighbors, and the stabilization energy is therefore quite low. On the other hand, on the concave side, newly adsorbed atoms are stabilized by four neighbors from several facets, increasing the stabilization energy. Atoms will then preferentially adsorb on the concave sides, favoring the growth of the NC along these sides rather than the convex sides.  The growth will be favored on the facets that present a concave-type surface, while the convex-type surface does not favor adsorption of new atoms and will remain unchanged. This can also be explained by the Gibbs−Thomson formula which states that the chemical potential is inversely proportional to the curvature. Δμ γ = Ω + (1/ R1+1/ R2)
where Δμ is the change in the chemical potential, γ the interfacial free energy, Ω the atomic volume, and R1 and R2 are the radii curvature.2 For a convex surface where the curvature is positive, the chemical potential change is positive and the adsorption of atoms is favored on a flat surface rather that a convex surface. On the other hand, for a concave surface where the curvature is negative, the change in the chemical is negative and the adsorption of atoms on the concave side is favored.
纳米材料三角形片状的生成机理
TIM截图20200715203155.jpg


纳米材料三角形片状的生成机理-1
TIM截图20200715204028.jpg

2楼2020-07-16 01:44:26
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

tantaixing

超级版主

优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!优秀!!有木有!!!



tl-tomorrow(金币+2): 谢谢参与
这个也材料晶面原子排列方式有关。你所举例子是fcc结构的贵金属,很容易形成三角片,六角片的形貌。所暴露的(111)晶面方向,是六方点阵。可以是三角形也可以是六边形。
9楼2020-07-17 09:10:48
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
简单回复
psylhh3楼
2020-07-16 20:48   回复  
tl-tomorrow(金币+2): 谢谢参与
2020-07-16 20:50   回复  
tl-tomorrow(金币+2): 谢谢参与
发自小木虫Android客户端
tzynew5楼
2020-07-16 21:36   回复  
tl-tomorrow(金币+2): 谢谢参与
2020-07-16 22:15   回复  
tl-tomorrow(金币+2): 谢谢参与
syhorchid7楼
2020-07-16 23:19   回复  
tl-tomorrow(金币+2): 谢谢参与
2020-07-16 23:35   回复  
tl-tomorrow(金币+2): 谢谢参与
gbs02230810楼
2020-07-17 10:24   回复  
tl-tomorrow(金币+2): 谢谢参与
2020-07-17 20:58   回复  
tl-tomorrow(金币+2): 谢谢参与
2020-07-17 21:10   回复  
nono200913楼
2020-07-18 08:44   回复  
tl-tomorrow(金币+2): 谢谢参与
`
相关版块跳转 我要订阅楼主 tl-tomorrow 的主题更新
普通表情 高级回复 (可上传附件)
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 309求调剂 +7 gajsj 2026-03-25 9/450 2026-04-01 11:48 by gajsj
[考研] 0703求调剂 +3 zizimo 2026-03-31 3/150 2026-04-01 11:15 by 逆水乘风
[考研] 0710生物学求调剂! +6 叙述文 2026-03-31 6/300 2026-04-01 09:39 by JourneyLucky
[考研] 08工科275分求调剂 +8 AaAa7420 2026-03-31 8/400 2026-04-01 08:09 by 探123
[考研] 各位老师好,我的一志愿为北京科技大学085601材料专硕 +12 Koxui 2026-03-28 12/600 2026-03-31 23:17 by wwytracy
[考研] 290分调剂求助 +10 吉祥止止陈 2026-03-25 10/500 2026-03-31 17:54 by 544594351
[考研] 353求调剂 +3 江上枫_26 2026-03-28 3/150 2026-03-31 15:53 by jp9609
[考研] 学硕274求调剂 +17 Li李鱼 2026-03-26 17/850 2026-03-31 15:19 by 客尔美德
[考研] 274求调剂 +6 xiao爱同学 2026-03-30 6/300 2026-03-31 10:04 by cal0306
[考研] 食品工程专硕一志愿中海洋309求调剂 +5 小张zxy张 2026-03-26 10/500 2026-03-31 00:29 by jp9609
[考研] 本科211总分289,08工学真心求调剂 +3 utopiaE 2026-03-30 3/150 2026-03-30 23:42 by ms629
[考研] 281求调剂 +5 亚克西good 2026-03-26 7/350 2026-03-30 20:42 by dophin1985
[考研] 085601材料工程找调剂 +17 oatmealR 2026-03-29 18/900 2026-03-30 19:21 by Wang200018
[考研] 295材料工程专硕求调剂 +10 1428151015 2026-03-27 10/500 2026-03-30 19:00 by 源_2020
[考研] 322求调剂 +10 宋明欣 2026-03-27 10/500 2026-03-30 18:47 by 544594351
[考研] 329求调剂 +10 钮恩雪 2026-03-25 10/500 2026-03-29 13:32 by peike
[考研] 0856求调剂 +13 zhn03 2026-03-25 14/700 2026-03-29 08:13 by fmesaito
[考研] 085602 化工专硕 338分 求调剂 +12 路痴小琪 2026-03-27 12/600 2026-03-28 15:41 by L135790
[考研] 283求调剂 +7 A child 2026-03-28 7/350 2026-03-28 12:05 by zllcz
[考研] 一志愿吉大071010,316分求调剂 +3 xgbiknn 2026-03-27 3/150 2026-03-27 10:36 by guoweigw
信息提示
请填处理意见