Directed Self-Assembly of Silica Nanoparticles into Nanometer-Scale Patterned Surfaces Using Spin-Coating

2004 ◽  
Vol 16 (16) ◽  
pp. 1427-1432 ◽  
Author(s):  
D. Xia ◽  
A. Biswas ◽  
D. Li ◽  
S. R. J. Brueck
Keyword(s):  
Silica Nanoparticles ◽  
Self Assembly ◽  
Spin Coating ◽  
Nanometer Scale ◽  
Patterned Surfaces

Formation of Single-Digit Nanometer Scale Silica Nanoparticles by Evaporation-Induced Self-Assembly

Langmuir ◽  
2018 ◽  
Vol 34 (4) ◽  
pp. 1711-1717 ◽  
Author(s):  
Shigeru Sakamoto ◽  
Masashi Yoshikawa ◽  
Kota Ozawa ◽  
Yoshiyuki Kuroda ◽  
Atsushi Shimojima ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Self Assembly ◽  
Nanometer Scale ◽  
Single Digit ◽  
Evaporation Induced Self Assembly

Examining the self-assembly of patchy alkane-grafted silica nanoparticles using molecular simulation

2021 ◽  
Vol 154 (3) ◽  
pp. 034903
Author(s):  
Nicholas C. Craven ◽  
Justin B. Gilmer ◽  
Caroline J. Spindel ◽  
Andrew Z. Summers ◽  
Christopher R. Iacovella ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Molecular Simulation ◽  
Self Assembly ◽  
The Self

scholarly journals Binary Self-Assembly of Nanocolloidal Arrays using Concurrent and Sequential Spin Coating Techniques

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 274
Author(s):  
Shih-Jyun Shen ◽  
Demei Lee ◽  
Yu-Chen Wu ◽  
Shih-Jung Liu
Keyword(s):  
Silicon Substrate ◽  
Self Assembly ◽  
Spin Coating ◽  
Processing Parameters ◽  
The Self ◽  
Silicon Substrates ◽  
Processing Conditions ◽  
Polystyrene Spheres ◽  
Optimal Processing ◽  
Spin Coater

This paper reports the binary colloid assembly of nanospheres using spin coating techniques. Polystyrene spheres with sizes of 900 and 100 nm were assembled on top of silicon substrates utilizing a spin coater. Two different spin coating processes, namely concurrent and sequential coatings, were employed. For the concurrent spin coating, 900 and 100 nm colloidal nanospheres of latex were first mixed and then simultaneously spin coated onto the silicon substrate. On the other hand, the sequential coating process first created a monolayer of a 900 nm nanosphere array on the silicon substrate, followed by the spin coating of another layer of a 100 nm colloidal array on top of the 900 nm array. The influence of the processing parameters, including the type of surfactant, spin speed, and spin time, on the self-assembly of the binary colloidal array were explored. The empirical outcomes show that by employing the optimal processing conditions, binary colloidal arrays can be achieved by both the concurrent and sequential spin coating processes.

Self-assembly of alkane capped silver and silica nanoparticles

2002 ◽  
Vol 12 (9) ◽  
pp. 2762-2768 ◽  
Author(s):  
H??kan Rensmo ◽  
Andrea Ongaro ◽  
Declan Ryan ◽  
Donald Fitzmaurice
Keyword(s):  
Silica Nanoparticles ◽  
Self Assembly

scholarly journals Selective porous gates made from colloidal silica nanoparticles

2015 ◽  
Vol 6 ◽  
pp. 2105-2112 ◽  
Author(s):  
Roberto Nisticò ◽  
Paola Avetta ◽  
Paola Calza ◽  
Debora Fabbri ◽  
Giuliana Magnacca ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Spin Coating ◽  
Colloidal Silica ◽  
Sol Gel ◽  
Chemical Species ◽  
Solvent System ◽  
Porous Films ◽  
Nanoporous Films ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Highly selective porous films were prepared by spin-coating deposition of colloidal silica nanoparticles on an appropriate macroporous substrate. Silica nanoparticles very homogenous in size were obtained by sol–gel reaction of a metal oxide silica precursor, tetraethyl orthosilicate (TEOS), and using polystyrene-block-poly(ethylene oxide) (PS-b-PEO) copolymers as soft-templating agents. Nanoparticles synthesis was carried out in a mixed solvent system. After spin-coating onto a macroporous silicon nitride support, silica nanoparticles were calcined under controlled conditions. An organized nanoporous layer was obtained characterized by a depth filter-like structure with internal porosity due to interparticle voids. Permeability and size-selectivity were studied by monitoring the diffusion of probe molecules under standard conditions and under the application of an external stimulus (i.e., electric field). Promising results were obtained, suggesting possible applications of these nanoporous films as selective gates for controlled transport of chemical species in solution.

Silica Nanoparticles to Polish Tooth Surfaces for Caries Prevention

2008 ◽  
Vol 87 (10) ◽  
pp. 980-983 ◽  
Author(s):  
R.M. Gaikwad ◽  
I. Sokolov
Keyword(s):  
Silica Nanoparticles ◽  
Ex Vivo ◽  
Bacterial Attachment ◽  
Nanometer Scale ◽  
Human Teeth ◽  
Cariogenic Bacteria ◽  
Force Microscopy ◽  
Atomic Force ◽  
Tooth Surfaces ◽  
Scale Roughness

Although silica particles have been used for tooth polishing, polishing with nanosized particles has not been reported. Here we hypothesize that such polishing may protect tooth surfaces against the damage caused by cariogenic bacteria, because the bacteria can be easily removed from such polished surfaces. This was tested on human teeth ex vivo. The roughness of the polished surfaces was measured with atomic force microscopy (AFM). A considerably lower nanometer-scale roughness was obtained when silica nanoparticles were used to polish the tooth surfaces, as compared with conventional polishing pastes. Bacterial attachment to the dental surfaces was studied for Streptococcus mutans, the most abundant cariogenic bacteria. We demonstrated that it is easier to remove bacteria from areas polished with silica nanoparticles. The results demonstrate the advantage of using silica nanoparticles as abrasives for tooth polishing.

scholarly journals Graphene Templated DNA Arrays and Biotin-Streptavidin Sensitive Bio-Transistors Patterned by Dynamic Self-Assembly of Polymeric Films Confined within a Roll-on-Plate Geometry

Nanomaterials ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 1468
Author(s):  
Sangheon Jeon ◽  
Jihye Lee ◽  
Rowoon Park ◽  
Jeonghwa Jeong ◽  
Min Chan Shin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Self Assembly ◽  
Patterned Surfaces ◽  
Dna Arrays ◽  
Simple Strategy ◽  
Modified Dna ◽  
Highly Sensitive ◽  
Wide Range ◽  
Surface Chemistries ◽  
Plate Geometry

Patterning of surfaces with a simple strategy provides insights into the functional interfaces by suitable modification of the surface by novel techniques. Especially, highly ordered structural topographies and chemical features from the wide range of interfaces have been considered as important characteristics to understand the complex relationship between the surface chemistries and biological systems. Here, we report a simple fabrication method to create patterned surfaces over large areas using evaporative self-assembly that is designed to produce a sacrificial template and lithographic etch masks of polymeric stripe patterns, ranging from micrometer to nanoscale. By facilitating a roll-on-plate geometry, the periodically patterned surface structures formed by repetitive slip-stick motions were thoroughly examined to be used for the deposition of the Au nanoparticles decorated graphene oxide (i.e., AuNPs, ~21 nm) and the formation of conductive graphene channels. The fluorescently labeled thiol-modified DNA was applied on the patterned arrays of graphene oxide (GO)/AuNPs, and biotin-streptavidin sensitive devices built with graphene-based transistors (GFETs, effective mobility of ~320 cm2 V−1 s−1) were demonstrated as examples of the platform for the next-generation biosensors with the high sensing response up to ~1 nM of target analyte (i.e., streptavidin). Our strategy suggests that the stripe patterned arrays of polymer films as sacrificial templates can be a simple route to creating highly sensitive biointerfaces and highlighting the development of new chemically patterned surfaces composed of graphene-based nanomaterials.

scholarly journals Bottom-up self-assembly of heterotrimeric nanoparticles and their secondary Janus generations

2019 ◽  
Vol 10 (44) ◽  
pp. 10388-10394 ◽  
Author(s):  
Jianye Fu ◽  
Zhengying Gu ◽  
Yang Liu ◽  
Jun Zhang ◽  
Hao Song ◽  
...  
Keyword(s):  
Silica Nanoparticles ◽  
Intestinal Epithelium ◽  
Self Assembly ◽  
Bottom Up ◽  
Epithelial Monolayer ◽  
Cargo Transport ◽  
Human Intestinal Epithelium ◽  
Monolayer Model

Designed Janus silica nanoparticles can stimulate stronger phagocytosis and exhibit higher cargo transport across an in vitro epithelial monolayer model mimicking the human intestinal epithelium.

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