24小时热门版块排行榜    

查看: 2074  |  回复: 3
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

菜园小饼1991

新虫 (初入文坛)

[求助] 阳离子聚合物的DLS水合粒径与TEM粒径不一致的问题 已有2人参与

各位亲们,文章审稿人提出问题,让就“DLS水合粒径与TEM粒径不一致的问题”引用文献多加解释。我目前的理解是TEM测试下的复合粒子是已经干燥的纳米粒子,而DLS是溶液状态下的复合粒子粒径。粒子在水溶液中发生一定的溶胀现象,导致水合粒径大于干燥粒子。

但是查阅了好久,并没有找到直接给出解释的文章。

不知道有没有虫友可以帮忙提供相关文献的,非常感谢!
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

海洋的心

铁杆木虫 (正式写手)

【答案】应助回帖

★ ★ ★ ★ ★ ★ ★ ★ ★ ★
感谢参与,应助指数 +1
菜园小饼1991: 金币+10, ★★★★★最佳答案, 非常感谢 2015-12-24 16:07:54
However, the size was smaller than that measured by DLS. This was mainly due to the process involved in the preparation of sample. In the case of the TEM and SEM methods, TEM and SEM images depicted the actual size at the dried state of sample, whereas the size measured by the laser light scattering method was a hydrodynamic diameter (hydrated state), and therefore the nanoparticles showed a larger hydrodynamic volume due to solvent effect in the hydrated state.

来源:The potential of self-assembled, pH-responsive nanoparticles of mPEGylated peptide dendron–doxorubicin conjugates for cancer therapy
3楼2015-12-22 22:13:15
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 4 个回答

菜园小饼1991

新虫 (初入文坛)

刚刚忘记说了,我测得的水合粒径大约为200 nm, TEM的粒径大约为50 nm, 粒子是阳离子聚合物与pDNA的复合物。
2楼2015-12-22 21:56:40
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

yifeng1206

铁杆木虫 (著名写手)

【答案】应助回帖

感谢参与,应助指数 +1
这是再正常不过的现象啊

researchgate上有一个人解释的答案
DLS gives a hydrodynamic size that corresponds to the core and the swollen corona of the micelles, whereas TEM often gives a size of the core for micelles in a dried state as the corona with low electronic density is not visible.
4楼2015-12-23 15:31:45
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
最具人气热帖推荐 [查看全部] 作者 回/看 最后发表
[考研] 北科281学硕材料求调剂 +17 tcxiaoxx 2026-03-20 19/950 2026-03-26 16:04 by 不吃魚的貓
[考研] 334分 一志愿武理 材料求调剂 +4 李李不服输 2026-03-26 4/200 2026-03-26 16:00 by 不吃魚的貓
[考研] 279 分 求调剂 +3 睡个好觉_16 2026-03-24 3/150 2026-03-26 15:43 by zzll406
[考研] 材料与化工考研调剂 +10 孅華 2026-03-22 10/500 2026-03-26 15:40 by zzll406
[考研] 263求调剂 +6 yqdszhdap- 2026-03-22 10/500 2026-03-26 13:11 by 公瑾逍遥
[考研] 环境专硕324分求调剂推荐 +5 轩小宁—— 2026-03-26 5/250 2026-03-26 12:05 by i_cooler
[考研] 一志愿南航 335分 | 0856材料化工 | GPA 4.07 | 有科研经历 +6 cccchenso 2026-03-23 6/300 2026-03-25 22:25 by 544594351
[考研] 333求调剂 +6 87639 2026-03-21 11/550 2026-03-25 16:17 by 87639
[考研] 求调剂323材料与化工 +4 1124361 2026-03-24 4/200 2026-03-25 11:19 by shulmg
[考研] 344求调剂 +3 desto 2026-03-24 3/150 2026-03-24 10:09 by 搏击518
[考研] 一志愿山东大学药学学硕求调剂 +3 开开心心没烦恼 2026-03-23 4/200 2026-03-24 00:06 by 开开心心没烦恼
[考研] 环境学硕288求调剂 +8 皮皮皮123456 2026-03-22 8/400 2026-03-23 23:47 by 热情沙漠
[考研] 一志愿国科过程所081700,274求调剂 +3 三水研0水立方 2026-03-23 3/150 2026-03-23 23:11 by MajorWen
[考研] 293求调剂 +3 涛涛Wjt 2026-03-22 5/250 2026-03-22 22:21 by jiangpengfei
[考研] 306求调剂 +5 来好运来来来 2026-03-22 5/250 2026-03-22 16:17 by BruceLiu320
[考研] 319求调剂 +4 小力气珂珂 2026-03-20 4/200 2026-03-22 15:53 by ColorlessPI
[考研] 求调剂院校信息 +6 CX 330 2026-03-21 6/300 2026-03-22 15:25 by 无懈可击111
[考研] 0703化学297求调剂 +3 Daisy☆ 2026-03-20 3/150 2026-03-21 17:45 by ColorlessPI
[考研] 南昌大学材料专硕311分求调剂 +6 77chaselx 2026-03-20 6/300 2026-03-21 07:24 by JourneyLucky
[考研] 353求调剂 +3 拉钩不许变 2026-03-20 3/150 2026-03-20 19:56 by JourneyLucky
信息提示
请填处理意见