Abstract
We exploited three approaches to fabricate urea nanofibers by using an array of core-shell particles as a template. Core-shell particles were prepared by seeded polymerization and used as an atto-liter scale incubator (atto-incubator) to form nanofibers of urea crystal. Firstly, the mixture of the particle suspension and a urea aqueous solution was spin-coated to promote arrangement of core-shell particles and urea crystallization simultaneously (mix-spin method). Secondly, core-shell particles were arranged by a Langmuir-Blodgett apparatus and then the spin-coating of a urea aqueous solution was performed (LB-spin method). Then, the nano-network of urea crystals was produced by heat treatment at 80 °C. The interparticle distance and the amount of the remaining solution were important to determine the shapes, orientation and amounts of urea crystals. In the LB-natural drying method, one-directionally oriented nanocrystals were obtained over the wide range of the interparticle distance. As preliminary attempts, the obtained nanofibers were used as a template for the production of nanoscale metallic materials. Au nanofibers, nanotubes and nanorods could be obtained by gold sputtering deposition on the urea nanofiber and dissolving urea crystals. Ag-urea hybrid nanofibers were also produced using a mixture of urea and Ag nanoparticles by the modified LB-spin method.
| Original language | English |
|---|---|
| Pages (from-to) | 83-91 |
| Number of pages | 9 |
| Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
| Volume | 399 |
| DOIs | |
| Publication status | Published - 2012 Apr 5 |
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Keywords
- Au nanofibers
- Core-shell particle
- Self-assembly crystallization
- Urea crystals
ASJC Scopus subject areas
- Colloid and Surface Chemistry
Cite this
Production of nanofibers by atto-incubator-assisted assembly of urea using the particle array. / Watanabe, Shinji; Yamazaki, Megumi; Kaihara, Sachiko; Fujimoto, Keiji.
In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 399, 05.04.2012, p. 83-91.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Production of nanofibers by atto-incubator-assisted assembly of urea using the particle array
AU - Watanabe, Shinji
AU - Yamazaki, Megumi
AU - Kaihara, Sachiko
AU - Fujimoto, Keiji
PY - 2012/4/5
Y1 - 2012/4/5
N2 - We exploited three approaches to fabricate urea nanofibers by using an array of core-shell particles as a template. Core-shell particles were prepared by seeded polymerization and used as an atto-liter scale incubator (atto-incubator) to form nanofibers of urea crystal. Firstly, the mixture of the particle suspension and a urea aqueous solution was spin-coated to promote arrangement of core-shell particles and urea crystallization simultaneously (mix-spin method). Secondly, core-shell particles were arranged by a Langmuir-Blodgett apparatus and then the spin-coating of a urea aqueous solution was performed (LB-spin method). Then, the nano-network of urea crystals was produced by heat treatment at 80 °C. The interparticle distance and the amount of the remaining solution were important to determine the shapes, orientation and amounts of urea crystals. In the LB-natural drying method, one-directionally oriented nanocrystals were obtained over the wide range of the interparticle distance. As preliminary attempts, the obtained nanofibers were used as a template for the production of nanoscale metallic materials. Au nanofibers, nanotubes and nanorods could be obtained by gold sputtering deposition on the urea nanofiber and dissolving urea crystals. Ag-urea hybrid nanofibers were also produced using a mixture of urea and Ag nanoparticles by the modified LB-spin method.
AB - We exploited three approaches to fabricate urea nanofibers by using an array of core-shell particles as a template. Core-shell particles were prepared by seeded polymerization and used as an atto-liter scale incubator (atto-incubator) to form nanofibers of urea crystal. Firstly, the mixture of the particle suspension and a urea aqueous solution was spin-coated to promote arrangement of core-shell particles and urea crystallization simultaneously (mix-spin method). Secondly, core-shell particles were arranged by a Langmuir-Blodgett apparatus and then the spin-coating of a urea aqueous solution was performed (LB-spin method). Then, the nano-network of urea crystals was produced by heat treatment at 80 °C. The interparticle distance and the amount of the remaining solution were important to determine the shapes, orientation and amounts of urea crystals. In the LB-natural drying method, one-directionally oriented nanocrystals were obtained over the wide range of the interparticle distance. As preliminary attempts, the obtained nanofibers were used as a template for the production of nanoscale metallic materials. Au nanofibers, nanotubes and nanorods could be obtained by gold sputtering deposition on the urea nanofiber and dissolving urea crystals. Ag-urea hybrid nanofibers were also produced using a mixture of urea and Ag nanoparticles by the modified LB-spin method.
KW - Au nanofibers
KW - Core-shell particle
KW - Self-assembly crystallization
KW - Urea crystals
UR - http://www.scopus.com/inward/record.url?scp=84859987269&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84859987269&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2012.02.036
DO - 10.1016/j.colsurfa.2012.02.036
M3 - Article
AN - SCOPUS:84859987269
VL - 399
SP - 83
EP - 91
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
SN - 0927-7757
ER -