w********h
发帖数: 12367 | 1 标 题: Carbon Nanotube (2)
发信站: 日月光华 (2002年08月05日08:05:59 星期一), 站内信件
Electrochemical Devices
Because of the high electrochemically accessible surface area of porous nano
tube arrays, combined with their high electronic conductivity and useful mec
hanical properties, these materials are attractive as electrodes for devices
that use electrochemical double-layer charge injection. Examples include "s
upercapacitors," which have giant capacitances in comparison with those of o
rdinary dielectric-based |
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d*****s
发帖数: 313 | 2 I am drinking a cup of tea and suddenly a question comes up. I thought
it might interest you too so I post it here.
So what is tea, or coffee? Why after I put those treated tea leafs in
hot water the flavor goes into water? My guess is the tea we drink is
actually a kind of loosely bonded porous material, with "tea particles"
residing the pores. When these particles meet hot water the thermal
energy becomes large enough to break the trap from the network thus
water has flavour.
A further thinkin |
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a***n
发帖数: 578 | 3 CH3OH
-[ Si ]-
is it what you got? Does this materials have a lot of porous?
Did you use STM to look at it?
ester may not dissociate under base condition. |
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t***m
发帖数: 114 | 4 heihei, yes
with CH2OH attached.
it is actually should be porous consider its
rough surface which made the functional groups
did not distribute evenly at the surface
I only have some AFM images so far |
|
m***n
发帖数: 266 | 5
artificial vascular graft
的研究由来已久。看这段中文我猜大致意思是biodegradable
polymer作scaffold, 即3毫米ID的channel, 用“多微孔的膜”创造一个ECM，
这个"多微孔的膜“的膜估计也是porous polymer, hydrogel之类的，然后把EC注入，
不懂”肝脏或者肾脏的细胞注入“的具体理由，大概就是多提供点cell吧。
我想他最后还要把硅晶片抽出来。
光看中文科技消息，看不出来这个除了用个硅晶片外有什么闪光点。 |
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p******s
发帖数: 137 | 6 polymer ah...copolymers..
why they all like to get some porous materials? |
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y***e
发帖数: 6082 | 7 是高分子介孔材料吧
polymer ah...copolymers..
why they all like to get some porous materials? |
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w********h
发帖数: 12367 | 8 Langer在2005年MRS上的获奖发言整理后的文章。
综述了32年的历程。
以前听过偶老板说过的一些有趣的东西，
比如Langer一开始做controlled release的时候，
没人相信大分子可以从polymer里面release出来，
他一次参加Macromolecular Symposium的时候，
发言过后，有个老家伙对他说：we do not believe anything you have said.
呵呵。。。。不过我看Langer自己肯定当时没讲清楚，
如果那些是实心的polymer microsphere的话，
当然是没办法相信有大分子drug会release出来，
diffusivity在那里摆着的么。。。
关键Langer做的是工程，后来也发现放了药之后，
小球根本不是solid的了，先是产生相分离，
然后release玩了发现其实剩下的只是个porous structure而已，
能怪别人说你错么。。。你要是讲清了那是个空洞结构，
谁也不会傻到认为最多十几个纳米的药不能从3-100 microns的孔洞中渗出。
挺有意思的，Langer同学如今是超牛了 |
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y***e
发帖数: 6082 | 9 70年代谁会知道30年后纳米会这么火爆
Langer在2005年MRS上的获奖发言整理后的文章。
综述了32年的历程。
以前听过偶老板说过的一些有趣的东西，
比如Langer一开始做controlled release的时候，
没人相信大分子可以从polymer里面release出来，
他一次参加Macromolecular Symposium的时候，
发言过后，有个老家伙对他说：we do not believe anything you have said.
呵呵。。。。不过我看Langer自己肯定当时没讲清楚，
如果那些是实心的polymer microsphere的话，
当然是没办法相信有大分子drug会release出来，
diffusivity在那里摆着的么。。。
关键Langer做的是工程，后来也发现放了药之后，
小球根本不是solid的了，先是产生相分离，
然后release玩了发现其实剩下的只是个porous structure而已，
能怪别人说你错么。。。你要是讲清了那是个空洞结构，
谁也不会傻到认为最多十几个纳米的药不能从3-100 microns的孔洞中渗出。 |
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s****e
发帖数: 2934 | 10 是啊，哪你说我的化合物上如果有PMMA的基团会咋样？先照360nm的UV，聚合成低分子
量的PMMA，再照260nm的，我的化合物聚合，PMMA断掉并被remove就能做porous，呵呵
好像太理想了一点。。。
|
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e*********s
发帖数: 2 | 11 1) Post-doctoral position available at the Department of Physics and
Materials Science, City University of Hong Kong
The research work will be highly interdisciplinary with an emphasis on
porous silicon based-biosensors, bioreactors and functional materials.
Successful applicants will have received a Ph.D. and demonstrated a solid
background in chemistry and/or materials science with a strong publication
record. Experience in handling silicon surface modification and/or
hydrogels is a plus.
E |
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c******r
发帖数: 59 | 12 Anyone has experience in how to make porous large size silica from fine
silica powders? Simple press method does not work for me since the tap
density of formed large size silica is way too high compared with fine
powders. The target is to have marcropores formation in formed large size
silica. I am thinking to add something together with fine powders while
press; then extract (remove) the "something" out but I have very hard time
to find that "something". Probably adding some kinds of polymers |
|
c**m
发帖数: 757 | 13 本人略知polymer chemistry，porous materials.
哪位如果有相关的机会，能不能推荐我一下？
让咱也在申绿卡，申博后，找工作时简历也能好看点.
本人水平一般，所以牛文不敢接 |
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m*****e
发帖数: 1506 | 14 advanced materials, nanomaterials, biomaterials, nanocomposite, organic/
inorganic hybrides, bio-inspired materials, porous materials, functional
nanoscopic network... |
|
y****o
发帖数: 50 | 15 好文章，DSC不错。提个笨笨的问题，porosity和pore size是一回事吗？有的文章用
blotted dry method去测porosity因为材料的密度一致，但是要是不知道密度（比如说
混合材料），那这种方法的可行性如何？--〉Controlling the porosity of fibrous
scaffolds by modulating the fiber diameter and packing density有什么更好的方
法（如果不用diffusion,因为材料的限制-fragile &thin）？
另外有的方法用algorithm预测pore size,可能使我背景差，没太看懂怎么算的555
Eichhorn SJ, Sampson WW. Statistical geometry of pores and statistics of
porous nanofibrous assemblies. Journal of the Royal Society, Interface / the
Royal Society 2005;2(4):309-18.
非常感... 阅读全帖 |
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w********h
发帖数: 12367 | 16 Rank Full Journal Title Journal Impact Factor
1 CHEMICAL REVIEWS 45.661
2 NATURE MATERIALS 36.425
3 Nature Nanotechnology 33.265
4 CHEMICAL SOCIETY REVIEWS 30.425
5 PROGRESS IN MATERIALS SCIENCE 25.870
6 ACCOUNTS OF CHEMICAL RESEARCH 24.348
7 Nature Chemistry 23.297
8 Nano Today 18.432
9 Annual Review of Materials Research 15.629
10 Energy & Environmental Science 15.490
11 ADVANCED MATERIALS 15.409
12 Advanced Energy Mate... 阅读全帖 |
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k****i
发帖数: 36 | 17 真心求推荐审稿。
涉及的领域主要有polymer chemistry, self-assembly, drug delivery,
bioconjugation, covalent organic framework, porous organic materials, hybrid
materials.
提前谢过啦。
邮箱[email protected]/* */ |
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s*******o
发帖数: 2 | 18 我的PHD 论文是关于有限元编程，大变形，POROUS 材料，可用于分析土壤和肌肉。
找了半年工作，却无结果。无论是POSTDOC，COMPANY，没有反应，不知谁能帮忙一
下，提供一些INFORMATION。 谢谢！ |
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o*****e
发帖数: 5 | 19 我现在的情形很不好,想法也很乱,上来说说,请大家指点,语无伦次之处,也请包涵.
我是学固体力学的,三年前拿了博士.硕士和博士都跟同一个老板念的,写有限元的程序,
模拟复合材料制造的过程,做过filament winding和resin transfer molding的模拟,模
型都很简单,热方面是基本的热传导加上polymer的固化,流体方面把polymer简化成
incompressible and newtonian fluid, 用darcy's law算flow through porous media
.毕业时一时头脑发热,没做什么research就jump到nano的领域,去了一个很差的学校做
博士后.当时也没有申请别的学校,只是不小心碰到这个老师,他说可以让我做nano
injection molding,我觉得听起来还不错,就去了.结果是后来他又不做这方面了,我就
学了些计算化学的东东,算了一下nanotube的弹性常数之类,两年就过去了.这段时间的
收获是好好地补了一下材料方面的知识,对nano也有了一点了解.去年换到另一所学校做
博士后,说来也是稀里糊涂地来到这个 |
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j****x
发帖数: 943 | 20 Sounds complicated, a lot of porous media stuff. |
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j****x
发帖数: 943 | 21 Not sure. I'm more into the continuum stuff. For porous media, when I
looked at so many integration stuff, I just felt dizzy. |
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s*********n
发帖数: 8 | 22 本人在公司从事计算流体研发工作。如有相关审稿机会，希望能与我联系skyworld520@
gmail.com。谢谢 |
|
|
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s*********n
发帖数: 8 | 25 currently, we don't have any opening. We are likely to hire an intern in the
near future. I will post ads here, once it's approved by the management
chain. |
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d********k
发帖数: 701 | 26 一种polymer是porous material。pore size 和 porosity已知。
在管子里，有水从中流过，怎么计算其表面的fluid shear stress？
谢谢 |
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j******e
发帖数: 40 | 27 Update: 已经有足够的reviewer了。谢谢大家的帮助。
------------------------------------------------------------------------
我有3篇会议的文章需要reviewers，是ASME 2013 Fluids Engineering Division
Summer Meeting (FEDSM 2013).有一篇是实验的，两篇CFD的。需要有turbulent flow,
或liquid-solid multi-phase flow,或porous media flow相关背景的reviewers.
审稿的dead line是2月15日，时间有点紧。
如果您有时间有兴趣，并且有相关的流体力学方面背景，请发给我您的email，并注明
可以审几篇，我会让系统发给您正式的审稿邀请。
审稿人最好是已经工作，博后，或phd快毕业的。email地址最好是您公司或学校的。
谢谢 |
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s**********6
发帖数: 38 | 28 International Journal of Energy & Technology
Request from an Italian Editor
key word: Chaotic behavior, thermal convective flow, porous media
请将简历发给我，我会让editor直接联系你。比较急，需要几天内审完。 |
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c******4
发帖数: 4896 | 29 要弄成porous media来做么？还是当粘弹性材料？
小东西的话我可以来做。。哈你们招intern么？ |
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m******e
发帖数: 10 | 30 希望优秀的学弟学妹报考。我们正见证非常规油气资源（页岩油，页岩气，煤层气，等
等）的革命，VT的石油天然气工程的科研集中在以下领域：petroleum engineering,
enhanced oil recovery, shale oil and gas，and multiscale simulation of flow
and transport in porous media。希望你毕业于Mechanical engineering, Chemical
engineering, Civil engineering, Applied math，或者相关学科， 有MASTER学历，
有一项或者多项以下技能：数值模拟，基于CPU和GPU的并行计算编程，计算流体力学，
岩石力学，以及CT和SEM图像扫描和处理。如果有兴趣请直接发简历给：chen08@vt.
edu |
|
发帖数: 1 | 31 One PhD position with full financial support is immediately available in Dr.
Jing Fan’s research group of Complex Fluids and Soft Materials, in the
Department of Mechanical Engineering at the City College of New York (CCNY).
Based on cutting-edge microfluidics and visualization techniques, the group
conducts interdisciplinary experimental research on a wide variety of
topics, such as the transport phenomena in biological tissues, design and
fabrication of functional porous materials, enhanced oi... 阅读全帖 |
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m******i
发帖数: 834 | 32 原子层沉积技术可能为未来能源提供新的解决方法
nano 发表于: 2007-7-24 09:05 来源: 纳米科技世界
原子层沉积技术可能为未来能源提供新的解决方法,Atomic layer deposition fuels
future solutions to nation's energy challenges
The three images illustrate how a combination of anodized aluminum oxide (
AAO) and atomic layer deposition (ALD) provides precisely controlled, ultra-
uniform porous support for new and well-defined catalysts. Credit: ANL
[纳米科技世界快讯]More efficient and less costly solar cells, solid-state
lighting and industrial catalysts are potential app |
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S*****n
发帖数: 6055 | 33 还是应该按领域来
比如
nanoparticle
nanowire/nanoribbon
CNT and NT related
2-D and 3-D nanostructures
micro- and meso-porous materials
MEMS/BioMEMS/NEMS related
nanoelectronic/nanophotonics
nanobiotechnology
etc
etc |
|
c******r
发帖数: 59 | 34 Anyone has experience in how to make porous large size silica from fine
silica powders? Simple press method does not work for me since the tap
density of formed large size silica is way too high compared with fine
powders. The target is to have marcropores formation in formed large size
silica. I am thinking to add something together with fine powders while
press; then extract (remove) the "something" out but I have very hard time
to find that "something".
Any suggestions will be appreciated! |
|
x*******2
发帖数: 5333 | 35 some people showed porous silicon has a high seebeck coefficient too. but it
only published on a IEEE conference i remember |
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a**r
发帖数: 224 | 36 Attached is a list of DFT models from QuantoChrome, maybe it's helpful.
Seems that the models cover all different kinds of porous materials. |
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n*******w
发帖数: 6708 | 37 A Theory of Plasticity for Porous Materials and Particle-Reinforced
Composites
Journal of Applied Mechanics -- June 1992 -- Volume 59, Issue 2, pp. 261-268
Y. P. Qiu
Sonoco Products Co., 555 Science Drive, Suite B, University of Wisconsin
Research Park, Madison, WI 53711
G. J. Weng
Department of Mechanical and Aerospace Engineering, Rutgers University, New
Brunswick, NJ 08903
我的EMAIL y*****[email protected] |
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s****l
发帖数: 323 | 38 看到很多做porous monolith 的文章在做BET表征，我想问如果孔的直径很大，100nm以
上到2um之间，这个BET会不会不准确？或者说因为cc/g值太低而导致所测值不可信？有
什么其他方法表征这样的多孔结构吗？谢谢 |
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y*q
发帖数: 11 | 39 Self-Assembly of Metal Oxide Nanoparticles into Hierarchically Patterned
Porous Architectures Using Ionic Liquid/Oil Emulsions
Shenghu Zhou†‡, Zhen Ma†, Gary A. Baker†, Adam J.
Rondinone†, Qing Zhu†, Huimin Luo†, Zili Wu† and
Sheng Dai*†
Langmuir, Article ASAP
http://pubs.acs.org/doi/abs/10.1021/la901149m |
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o********0
发帖数: 2145 | 40 我们组是从英国Leigh Canham那买的,他有个公司做多孔硅,你可以问问 |
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m*******r
发帖数: 481 | 41 谢谢!
是 Porous Semiconductors-Science and Technology (PSST) 吗? |
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g***q
发帖数: 94 | 42 【 以下文字转载自 Macromolecules 讨论区 】
发信人: gnaiq (强), 信区: Macromolecules
标 题: 求赐审稿： polymer composite, surface modification, battery-related, graphene related， porous material
发信站: BBS 未名空间站 (Wed Feb 4 02:19:13 2015, 美东)
PhD毕业一年，做的东西比较杂，可审的方向也比较多，希望各位有机会的赐给我几篇
审稿吧。
准备申绿卡 不易啊。。。
站内联系，谢谢！！ |
|
g***q
发帖数: 94 | 43 【 以下文字转载自 Macromolecules 讨论区 】
发信人: gnaiq (强), 信区: Macromolecules
标 题: 求赐审稿： polymer composite, surface modification, battery-related, graphene related， porous material
发信站: BBS 未名空间站 (Wed Feb 4 02:19:13 2015, 美东)
PhD毕业一年，做的东西比较杂，可审的方向也比较多，希望各位有机会的赐给我几篇
审稿吧。
准备申绿卡 不易啊。。。
站内联系，谢谢！！ |
|
k****i
发帖数: 36 | 44 真心求推荐审稿。
涉及的领域主要有polymer chemistry, self-assembly, drug delivery,
bioconjugation, covalent organic framework, porous organic materials, hybrid
materials.
提前谢过啦。
邮箱[email protected]/* */ |
|
k****i
发帖数: 36 | 45 真心求推荐审稿。
涉及的领域主要有polymer chemistry, self-assembly, drug delivery,
bioconjugation, covalent organic framework, porous organic materials, hybrid
materials.
提前谢过啦。
邮箱[email protected] |
|
D********g
发帖数: 533 | 46 如果thin film不是很uniform 比如蛋白质monolayer 这样测出来的thin film
thickness准么？
或者大一点说 porous layer/film 的测量是不是ellipsometry没办法测准？ |
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g*********n
发帖数: 808 | 47 锂电池特辑1:迈向超级电池[物理]
锂离子电池，也许是下一代能源和交通问题解决的方法
1801年，伏打把他的“电堆”装置公开给拿破仑，他不可能想到两个世纪之后，他的发
明可能成为人类生活的中心。由被盐水浸泡的锌和银电极的原始电池使得小型电化学能
源-锂电池成为了现代消费电子市场的中心。
在《瓶瓶装闪电》中，科学记者森斯-费莱彻解释了锂电池的工作原理，并且对致使锂
电池盛行的研究节奏进行了描述。每年数十亿的元件生产和数十亿的美元利润，可见移
动电子市场正在繁荣。在绿色能源中，锂电池也受到了新的挑战。费莱彻描述到发展下
一代锂电池的激烈竞争，但是可能更多的人选择现有的技术。
日益减少的石油资源以及备受关注的气候变化迫使我们使用更多的替代能源，比如太阳
能、风能，也不得不用混合动力车、油电混合车以及最终的全电动汽车来替代污染的内
燃汽车。由于我们的太阳不能按照我们的要求发光，风不能按照我们的意愿吹来，这些
可再生能源的成功应用依赖于我们高效的储电能力。电化学电池，特别是锂电池，成为
了最佳选择，因为它们把化学能转变为电能效率很高并且无有毒物质释放。
玻利维亚和南美国家巨大储量的碳酸锂盐可使汽... 阅读全帖 |
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s*********s
发帖数: 18 | 48
PHYSICS
Charles H. Bennett
IBM Fellow
Thomas J. Watson Research Center
IBM Corporation
Yorktown Heights, New York, USA
-and-
Gilles Brassard
Canada Research Chair in Quantum Information Processing
University of Montreal
Montreal, Quebec, Canada
-and-
William K. Wootters
Barclay Jermain Professor of Natural Philosophy
Department of Physics
Williams College,
Williamstown, Massachusetts, USA
For their pioneering description of a protocol for quantum teleportation,
which has since been experimental... 阅读全帖 |
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d*****g
发帖数: 1616 | 49 http://arxiv.org/abs/1110.1409
Abstract:
Good Fences: The Importance of Setting Boundaries for Peaceful Coexistence
Alex Rutherford, Dion Harmon, Justin Werfel, Shlomiya Bar-Yam, Alexander
Gard-Murray, Andreas Gros, Yaneer Bar-Yam
(Submitted on 6 Oct 2011)
We consider the conditions of peace and violence among ethnic groups,
testing a theory designed to predict the locations of violence and
interventions that can promote peace. Characterizing the model's success in
predicting peace requires ... 阅读全帖 |
|
d*****g
发帖数: 1616 | 50 http://arxiv.org/abs/1110.1409
Abstract:
Good Fences: The Importance of Setting Boundaries for Peaceful Coexistence
Alex Rutherford, Dion Harmon, Justin Werfel, Shlomiya Bar-Yam, Alexander
Gard-Murray, Andreas Gros, Yaneer Bar-Yam
(Submitted on 6 Oct 2011)
We consider the conditions of peace and violence among ethnic groups,
testing a theory designed to predict the locations of violence and
interventions that can promote peace. Characterizing the model's success in
predicting peace requires ... 阅读全帖 |
|
