| 查看: 3051 | 回复: 37 | |||
[交流]
水凝胶电化学材料
|
|||
|
Hydrogel electronics makes its debut 见 http://nanotechweb.org/cws/article/tech/49992 http://www.pnas.org/content/109/24/9287.abstract A new type of hydrogel could make for high-performance energy-storage electrodes and biosensors. So say researchers at Stanford University in the US who have developed a porous nanostructured material based on the conducting polymer polyaniline that has excellent electronic and electrochemical properties. PAni hydrogel PAni hydrogel "Our material combines the advantages of hydrogels (which have a large surface area) and organic conductors, with their high electronic conductivity and good electrochemical properties," team members Lijia Pan and Guihua Yu told nanotechweb.org. "It could thus be used in high-performance electrochemical devices such as supercapacitors and ultrasensitive biosensors, like those used to detect glucose, for example." Hydrogels are 3D polymer networks that can hold a large amount of water and have a structure similar to that of biological tissue. Most hydrogels are based on non-conducting polymer matrices, however, which limits their applications in electronics. The researchers, led by Zhenan Bao and Yi Cui, have now used phytic acid, which is a good ionic conductor, to dope and crosslink the conducting polymer polyaniline (PAni) in an effort to overcome this problem. Inkjet printed pattern using PAni hydrogel Inkjet printed pattern using PAni hydrogel The team began by mixing two solutions. The first initiates the polymerization reaction while the second contains the monomer aniline and the doping phytic acid. Typical gelation times can be as short as three minutes, explains Yu, thanks to the fact that each phytic acid molecule contains six phosphorus groups that can interact with several polymer chains at once. "We showed that we can synthesize the conductive polymer hydrogel in large quantities and also pattern it by inkjet printing and spray techniques," said Pan. "This means that we might be able to fabricate electronic and electrochemical devices such as biosensor arrays and microsupercapacitors on a large scale fairly easily." The PAni hydrogel was found to have a high specific capacitance of around 480 F/g and a high rate capability (it charges and discharges energy very fast), which means that it might be ideal in applications such as electric vehicles and grid-scale energy storage. To compare commercial carbon only has a specific capacitance of around 100 F/g. Hydrogel glucose sensor Spurred on by these results, the researchers decided to fabricate a glucose sensor by immobilizing the enzyme glucose oxidase (GOx) in the hydrogel. Glucose reacts with the GOx and its concentration in solution is monitored via electrochemical measurements using the GOx-PAni hydrogel electrode. "The electrode acts as an excellent interface between the biological (the enzyme GOx) and the synthetic (the electrode)," said Pan, "and the 3D conducting nanostructured framework allows the hydrogel to effectively collect electrons during the enzyme-catalyzed glucose redox reactions." The hydrogel also reacts very fast – in around just 0.3 seconds compared with a response time of around 20 seconds for commercial glucose sensors, he adds. The team says that it is now busy developing other novel hydrogels based on various conducting polymers. "We are also trying to push our new technology into areas like high-performance lithium batteries, electro-chromic devices, neuronal electrodes and even electronic skin," revealed Yu. The current work is reported in PNAS. |
回复此楼» 本帖已获得的红花（最新10朵）
» 猜你喜欢
Renlab@monash全奖博士机会，最后三天！
已经有0人回复
-
今年面上没有消息，想来是没了，散个金攒攒人品，为明年祈福
已经有698人回复
-
物理化学论文润色/翻译怎么收费?
已经有117人回复
-
合肥工业大学854仪器技术综合专业课考研
已经有0人回复
-
27年电化学博士毕业，想找海外QS前50的高校读博后求推荐
已经有3人回复
-
27年电池/材料类博士申请
已经有2人回复
-
2027年博士申请或转博科研助理 求推荐
已经有1人回复
-
请问谁有2025最新影响因子Excel表？金币求助！
已经有53人回复
-
氯化钠与有机磺酸分离
已经有1人回复
-
瑞典-博后-固态电池-粘结剂-锂离子电池方向
已经有53人回复
» 本主题相关商家推荐: (我也要在这里推广)
» 本主题相关价值贴推荐，对您同样有帮助:
- 关于水凝胶投稿的SCI杂志推荐
已经有4人回复
- 分享——用于功能高分子和生物材料的可再生资源（英文版）
已经有120人回复
- 请问生物材料的连通孔率怎么测试？不是开孔率。
已经有3人回复
- 电化学传感器电极材料问题
已经有7人回复
- 关于电致变色用 凝胶电解质的电化学窗口问题
已经有6人回复
- 求助3D石墨烯水凝胶制备怎样做才正确
已经有5人回复
- 聚电解质凝胶与聚电解质水凝胶的区别
已经有11人回复
- 如何测试交流阻抗
已经有14人回复
- 像金属一样导电的水凝胶
已经有175人回复
- 生物传感器电极材料.
已经有5人回复
- 电化学阻抗谱 材料化学当量
已经有21人回复
- 我需要做金属材料的电化学腐蚀测试，需要哪些设备，如何测试？
已经有15人回复
- 求助锂电池电极材料的电化学测试
已经有9人回复
- 锂电正极材料，测试表征中就差电化学性能，可以投什么期刊（国内外）
已经有6人回复
- 【讨论】环境化学-高分子材料科研仪器设备有哪些？
已经有3人回复
nono2009
超级版主 (文学泰斗)
-
专家经验: +21105 - 应助: 28684 (院士)
- 贵宾: 513.911
- 金币: 2555230
- 帖子: 1602255
- 在线: 65200.9小时
- 虫号: 827383
3楼2012-06-30 12:22:35
10楼2012-06-30 13:22:09
13楼2012-06-30 13:52:29
28楼2012-06-30 17:39:33
楼主真好！31楼2012-06-30 18:09:18
32楼2012-07-01 08:53:47
38楼2019-06-20 14:36:56
简单回复
2012-06-30 12:09
回复
ita(金币+1): 谢谢参与
2012-06-30 12:23
回复
ita(金币+1): 谢谢参与
2012-06-30 12:27
回复
ita(金币+1): 谢谢参与
fwjt6楼
2012-06-30 12:30
回复
ita(金币+1): 谢谢参与
2012-06-30 12:33
回复
ita(金币+1): 谢谢参与
2012-06-30 12:59
回复
ita(金币+1): 谢谢参与
2012-06-30 13:09
回复
ita(金币+1): 谢谢参与
遥远的九乡11楼
2012-06-30 13:44
回复
ita(金币+1): 谢谢参与
祝福
ctiehua12楼
2012-06-30 13:48
回复
ita(金币+1): 谢谢参与
a53167565714楼
2012-06-30 14:14
回复
ita(金币+1): 谢谢参与
mingliwiner15楼
2012-06-30 14:45
回复
ita(金币+1): 谢谢参与
僵尸之吻16楼
2012-06-30 14:50
回复
ita(金币+1): 谢谢参与
love萌201017楼
2012-06-30 14:51
回复
ita(金币+1): 谢谢参与
幻世七巧18楼
2012-06-30 14:53
回复
ita(金币+1): 谢谢参与
高安李敏19楼
2012-06-30 15:11
回复
ita(金币+1): 谢谢参与
geny00120楼
2012-06-30 15:26
回复
ita(金币+1): 谢谢参与
wsh59821楼
2012-06-30 15:26
回复
ita(金币+1): 谢谢参与
strive12312322楼
2012-06-30 15:33
回复
ita(金币+1): 谢谢参与
wu2081105523楼
2012-06-30 16:04
回复
ita(金币+1): 谢谢参与
木米月厷24楼
2012-06-30 16:08
回复
ita(金币+1): 谢谢参与
wlxwlx102625楼
2012-06-30 16:16
回复
ita(金币+1): 谢谢参与
song_ge26楼
2012-06-30 16:33
回复
ita(金币+1): 谢谢参与
spc0827楼
2012-06-30 16:46
回复
ita(金币+1): 谢谢参与
and_you29楼
2012-06-30 17:42
回复
ita(金币+1): 谢谢参与
祝福祝福
haixing200830楼
2012-06-30 17:59
回复
ita(金币+1): 谢谢参与
basa1933楼
2012-07-01 10:04
回复
ita(金币+1): 谢谢参与
clarktao34楼
2012-07-01 10:19
回复
ita(金币+1): 谢谢参与
glt81010435楼
2012-07-01 11:52
回复
ita(金币+1): 谢谢参与
wuliankui36楼
2012-07-03 12:24
回复
ita(金币+1): 谢谢参与
melodybusy37楼
2012-07-03 13:41
回复
ita(金币+1): 谢谢参与
送鲜花一朵
送鲜花一朵
