a***n
发帖数: 578 | 1 Self-assembled monolayers as a tunable platform for biosensor applications
Chaki NK, Vijayamohanan K
BIOSENSORS & BIOELECTRONICS
17 (1-2): 1-12 JAN 2002
Abstract:
Considerable attention has been drawn during the last two decades to
functionalize noble metal surfaces by forming ordered organic films of few nm
to several hundred-nm thickness. Self-assembled monolayer (SAM) provides one
simple route to functionalize electrode surfaces by organic molecules (both
aliphatic and aromatic) containing fr |
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a***u
发帖数: 9 | 2
Exactly! To reduce the leakage current (or in other words, to have a large
on/off ratio), it is desirable to have a larger band gap to reduce the
concentration of the minority carrier. At least this is theoretically true for
inorganic semiconductor. But for polymer semiconductor, in order to make CMOS,
it is desirable to have amphipolar semiconductive polymer. And the contact
between the metal electrode (source and drain) and the polymer requires the
band gap of the polymer to be small, unless |
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a***n
发帖数: 578 | 3 not clear at that concept. would you explain a little bit more?
Is that the different of Fermi level at each electrode?
goal is cheaper process.
value. |
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a***u
发帖数: 9 | 4 Currently, the highest power efficiency is around 33% (tested at NREL). It is
a tandem cell with three junctions. The highest efficiency was achieved at 300
suns (AM1.5). It is certainly true that the built-in potential of inorganic
p-n junction cell sets the maximum limit for Voc. But this is not true for
organic cell. Even for symmetrical organic cells sandwiched between two
identical electrodes, the Voc will not be zero. Brian Gregg wrote an excellent
review paper on this topic. (JPC B, 2003, |
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a***n
发帖数: 578 | 5 what is the conductivity of this rubber comparing with metal? thx |
|
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f******n
发帖数: 4 | 7 The rubber has some carbon in it. It's conductivity, it don't know. It should
be high as LCD don't need much current to drive. The simplest way to know is
to rip your waist watch open and measure it. The black soft stripe. And most
electronics which have touch pad have it, you phone, for example. I now
remember, I once measured one pad, it has resistance of order KOhm. |
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p*********e
发帖数: 42 | 8 Thanks!
I have found that many people are using carbon black with some rubber (PDMS)
binder for this purpose. The conductivity certainly depends on CB content, and
good ink does need some formulation to improve the interface adhesion.
Actually, people have used this method for many years, think about your car
tires!
should
how |
|
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s***a
发帖数: 4921 | 9 【 以下文字转载自 Chemistry 讨论区 】
【 原文由 singa 所发表 】
Analytica Chimica Acta
Volume 64, Issue 3,Pages 439-455
An enzyme electrode for the amperometric determination of glucose
G. G. Guilbault and G. J. Lubrano
a*******[email protected] |
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l*****g
发帖数: 556 | 10 Where to order Poteniostat, its reference electrode and Pt plates? Try to
set up a electro-deposition device. Nedd volatage to be around 1.5 V,
sometime will do 100 to 300 V as well
thanks, |
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D********g
发帖数: 533 | 11 【 以下文字转载自 Chemistry 讨论区 】
发信人: singa (瓦斯一号|我是中国人), 信区: Chemistry
标 题: Polymer Scientist Needed
发信站: BBS 未名空间站 (Sun Mar 9 20:18:38 2008), 转信
http://www.electromagneticcareers.com/Index.asp?ItemID=SearchJobs&Action=ViewJob&JobID=692
Location: Elkton Maryland USA
Job Description:
The Gore Fuel Cells Technology team is a leading global supplier of Membrane
Electrode Assemblies (MEAs) to the polymer electrolyte membrane fuel cell i
ndustry. The Gore MEA technology, based on a high power density a |
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g*******a
发帖数: 1383 | 12 hello, can someone explain me that during a die making
process, how the CAM get involved? say i have a sample,
and want to make stamping die acordingly. the hold way
would be hand, but i'm curious if they use some kind
of "scanning" process like electrode then get the shape
into CAM/CAD software.
i'm no ME so if someone knows how this works please
let me know, thanks! |
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s*i
发帖数: 5025 | 13 The process is actually straight forward. The software creates "path" for the
electrode. Then there is motor drived stages to perform the action to get the
job done physically. |
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d*********g
发帖数: 49 | 14 yes, it is not that safe. but people did test some cathode materials, e.g.
LiMn2O4, nano LiFePO4, and some anodes, e.g. Li4Ti5O12... for high power
applications.
we have a bright future! nano electrodes... hehe... |
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R****i
发帖数: 2387 | 15 那文献贴一下吧，我也挺想瞧瞧的，呵呵。
size,
sample
electrode |
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w******t
发帖数: 107 | 16 至于size，当年（现在也是？）Sony的LIB用的LiCoO2的尺寸不是有20微米吗？记得书
上说这个尺寸是优化的选择。如果用nanocrystalline LiCoO2的话，不使用大量的导电
介质（这里是cb），那也无法保证电荷能在LiCoO2和current collector之间正常传导
啊。我赞同你所说的不同particle之间的表面差异。
size,
sample
electrode |
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s***l
发帖数: 149 | 17 remember there are more than one electrode to make a battery
both cathode and anode count |
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y**e
发帖数: 1063 | 18 The situation is:
On a microarray chip, there are 16 micro gold electrodes with diameter of 10
micrometers,and elsewhere are photoresistors,when I want to do the electroc
hemical measurements, the aqueous electrolyte just sit above the gold electr
odes because of the hydrophobic surface tension, and the air inside this sma
ll cavity makes the broken circuit.
So dear peers please give some advices to me how to avoid this surface tensi
on and make the chips work.
Thanks very much! |
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m***c
发帖数: 1403 | 19 【 以下文字转载自 Chemistry 讨论区 】
发信人: renyufudan (back), 信区: Chemistry
标 题: 锂电又一篇nature-MIT的非整比磷酸锂铁
发信站: BBS 未名空间站 (Thu Mar 12 10:31:25 2009)
Nature首页
Lithium batteries charge ahead
Researchers demonstrate cells that can power up in seconds.
Geoff Brumfiel
Coated electrodes allow lithium-ion cells to charge up in secondsGettyTwo
researchers have developed battery cells that can charge up in less time
than it takes to read the first two sentences of this article. The work
could eventually produce ultra |
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m******e
发帖数: 432 | 20 在Adv. Mater. 2006, 18, 1202–1205是这样描述的 a hot melt of an ionomer film
(Bynel 4702, 35 lm thick, DuPont)
在Nature materials 2005, 4, 455是这样描述的platinized FTO counter electrodes
separated by 40-μm-thick hot-melt spacers (Bynel, Dupont).
还有很多文献中都用这样的spacer. 我打电话给Dupont, 他们说文章弄错了，这些
films根本不存在。有订购这样spacer的同学吗？能告诉我怎样才能买到？谢谢！ |
|
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m******g
发帖数: 66 | 22 co-ask~~
氯铂酸怎么coat在FTO上啊??热分解？385°？有没有什么方法指知道这个counter
electrode是不是成功了呢？我做出来只是黑黑的一层~不晓得可以用不？ |
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m******e
发帖数: 432 | 25 Chem Mater 2010, ASAP paper: TiO2 Branched Nanostructure Electrodes
Synthesized by Seeding Method for Dye-Sensitized Solar Cells
J. Phys. Chem. B 2003, 107(31), 7759–7767
上面两篇文章的定义是：The roughness factor, defined as units of surface area
per micrometer of the film thickness这样roughness factor就是有单位的参数了
。我真是很困惑呀! |
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y**e
发帖数: 1063 | 26 From an electrochemical view, the rough facotor is the ratio of the microsco
pic area over the geometric area.
microscopic area: which is computed by integrating the exposed surface over
all of its undulations, crevices, and asperities, even down to the atomic le
vel.
Geometric area: the cross-sectional area of the enclosure formed by projecti
ng the boundary of the electrode outward in parallel within the mean surface
normal.
Electrochemical Methods, Fundamentals and Applicaitons. Allen J Bard |
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c**s
发帖数: 80 | 27 看了原文，有几个地方不懂。比如Figure 5，为了测出internal quantum efficiency(
IQE)，为什么作者比较wire-array electrode (blue)和wires after being polymer-
embedded and peeled from the growth substrate (black) 两种样品的external
quantum efficiency(EQE)？作者不是说主要的parasitic adsorption是因为surface
states, impurities or residual VLS catalyst metal deposits. 镶嵌在PDMS里和从
衬底上剥离，如何就去掉了surface states和impurities的效应呢？
那位photovoltaics/solar cell的大拿给外行讲讲？ |
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c*******d
发帖数: 7 | 28 Job Title: Postdoctoral Research Associate in Nanomaterials
Department of Chemistry, University of South Dakota
We are currently seeking a Postdoctoral Research Associate to join the CY
Research group at the University of South Dakota with focus on nanomaterials
synthesis, assembly, and application. The Postdoctoral Research Associate
will carry out fundamental research in the area of functional nanocomposite
thin films, surface-enhanced Raman scattering, flexible electrodes, and
plasmonic nano |
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n**u
发帖数: 16 | 29 Nature Nanotechnology 5, 531 - 537 (2010)
High-power lithium batteries from functionalized carbon-nanotube electrodes
Thanks
Please send it to p****[email protected] |
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h**********4
发帖数: 13 | 30 The group has opening of a postdoctoral position. The applicant is expected
to have an earned Ph.D. in chemical engineering, chemistry, materials
science and engineering, or in a related field. The applicant should have
relevant experimental research experience in metal-air batteries, gas
diffusion electrodes, and/or electrocatalysis. Interested applicant can send
resume to Dr. Xing at x***[email protected]. |
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p*****0
发帖数: 1100 | 31 1.Tungsten Oxide Nanowires Grown on Carbon Cloth as a Flexible Cold Cathode
2.Energy-Storable Dye-Sensitized Solar Cells with Tungsten Oxide Charge-
Storage Electrode
如果哪位能下到，请发至我的邮箱：p********[email protected]
谢谢！ |
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x*******6
发帖数: 994 | 32 An article about hydrothermal synthesis and electrochemical characterization
of a supercapacitor electrode. Would give to the person having relative
research experiences and publications. Please send your resume and
publications to my mitbbs email. |
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a***k
发帖数: 1038 | 33 I thought cold fusion by electrolysis of heavy water using palladium
electrodes is a hoax, but now it seems it is real. DARPA and DOE are
sponsoring cold fusion again.
Arata-Zhang LENR Demonstration
By Steven B. Krivit
New Energy Times
May 22, 2008
OSAKA, JAPAN -- Against a monumental backdrop of bad publicity for cold
fusion since 1989, researchers in Japan on May 22 demonstrated the
production of excess heat and helium-4, the results of an historic low-
energy nuclear reaction experiment.
Yo |
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l**n
发帖数: 1861 | 34 C=e0 * e * A / d
e change with temperature, and measuring frequency, voltage etc.
But not change with area of electrode. |
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l****u
发帖数: 3449 | 35 Continuous Theory of Ferroelectric States in Ultrathin Films with Real
Electrodes
Authors: Bratkovsky, A.M.; Levanyuk, A.P.
Journal of Computational and Theoretical Nanoscience, Volume 6, Number 3,
March 2009 , pp. 465-489(25)
plase send to s************[email protected]
thanks! |
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c**m
发帖数: 1632 | 36 I have done some experiments on single nanowire/nanotube optical experiments
before. The difficulty is the collection efficiency as you stated in your
words. You might try gated pulses to improve the SNR. If the nanotech still
stayed in the stage I knew of, you could try to locate a nanowire/tube
between the electrodes and then optically pump it with a strong laser in
pulse mode with a duty cycle of 1/1000, then your optical spectrum analyzer
has to be tuned to the exact frequency with a fast sw |
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c******e
发帖数: 746 | 37 最近韩国SKKU发了篇文章：
Roll-to-roll production of 30-inch graphene films for transparent electrodes
感觉开始靠谱了。 |
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j******n
发帖数: 1568 | 38 这个不是大半年前就上了axiv么.
electrodes |
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p*****0
发帖数: 1100 | 39 1.Tungsten Oxide Nanowires Grown on Carbon Cloth as a Flexible Cold Cathode
2.Energy-Storable Dye-Sensitized Solar Cells with Tungsten Oxide Charge-
Storage Electrode
如果哪位能下到，请发至我的邮箱：p********[email protected]
谢谢！ |
|
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f*******d
发帖数: 339 | 41 While the committee concludes that they do not have any misconduct, the
practice of Bao and especially
Batlogg are not entirely satisfactory. Below are the excerpts
Zhenan Bao participated in a relatively small number of the papers in
question.
In addition to synthesizing molecules for Hendrik Schön, she also
prepared thin
films of organic material on patterned electrodes. One of the papers combined
quite reasonable electrical results that Zhenan Bao measured on her own
apparatus,
on struc |
|
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l****u
发帖数: 3449 | 43 【 以下文字转载自 Physics 讨论区 】
发信人: lotayu (罗大佑), 信区: Physics
标 题: paper help
发信站: BBS 未名空间站 (Fri Oct 23 09:52:19 2009, 美东)
Continuous Theory of Ferroelectric States in Ultrathin Films with Real
Electrodes
Authors: Bratkovsky, A.M.; Levanyuk, A.P.
Journal of Computational and Theoretical Nanoscience, Volume 6, Number 3,
March 2009 , pp. 465-489(25)
plase send to s************[email protected]
thanks! |
|
p*****0
发帖数: 1100 | 44 1.Tungsten Oxide Nanowires Grown on Carbon Cloth as a Flexible Cold Cathode
2.Energy-Storable Dye-Sensitized Solar Cells with Tungsten Oxide Charge-
Storage Electrode
如果哪位能下到，请发至我的邮箱：p********[email protected]
谢谢！ |
|
B*********e
发帖数: 86 | 45 ///////////////////////////////////////////////////////
http://www.mitbbs.com/article_t/Complain/31350655.html
[回复] [回信给作者] [本篇全文] [本讨论区] [修改] [删除] [转寄] [转贴] [收藏]
[举报] [ 1 ]
发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Complain
标 题: Re: authorship求教，被学生耍了 (转载)
发信站: BBS 未名空间站 (Thu Mar 15 18:51:02 2018, 美东)
///////////////([email protected] GMT)///////////////////
【 以下文字转载自 Faculty 讨论区 】
发信人: BiggeyIssue (出大事儿了..(可算)出大事儿了...), 信区: Faculty
标 题: Re: authorship求教，被学生耍了
发信站: BBS 未名空间站 (Thu Mar... 阅读全帖 |
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s**********8
发帖数: 25265 | 46 Frequently Asked Questions About the IRB:
The following is a compilation of questions frequently asked regarding
Institutional Review Boards, human subject protection and compliance with
federal regulations. These questions are organized according to whether they
pertain to:
I. Institutional Review Board regulations;
II. Informed Consent regulations;
III. Clinical investigations involving drugs;
IV. Clinical investigations involving medical devices; and
V. Other
I. INSTITUTIONAL REV... 阅读全帖 |
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f*******y
发帖数: 421 | 49 thanks for the link:
Argus II is designed to bypass the damaged photoreceptors altogether. A
miniature video camera housed in the patient’s glasses captures a scene.
The video is sent to a small patient-worn computer (i.e., the video
processing unit – VPU) where it is processed and transformed into
instructions that are sent back to the glasses via a cable. These
instructions are transmitted wirelessly to an antenna in the implant. The
signals are then sent to the electrode array, which emits sm... 阅读全帖 |
|
f*******y
发帖数: 421 | 50 thanks for the link:
Argus II is designed to bypass the damaged photoreceptors altogether. A
miniature video camera housed in the patient’s glasses captures a scene.
The video is sent to a small patient-worn computer (i.e., the video
processing unit – VPU) where it is processed and transformed into
instructions that are sent back to the glasses via a cable. These
instructions are transmitted wirelessly to an antenna in the implant. The
signals are then sent to the electrode array, which emits sm... 阅读全帖 |
|
