Chemically/Magnetically Dual-Responsive Nanoparticles for Multipurpose Colorimetric Sensor

Magnetically responsive colloidal photonic crystals can change their structural color according to the external magnetic field, which has been widely studied in recent years. However, due to lack of recognition ability towards non-magnetic analytes, these photonic crystals can be applied to constructing a sensor only when an additional stimuli responsive unit is involved. To address this problem, we used a functional protein to modify the magnetically responsive colloidal particles to construct chemically/magnetically dualresponsive nanoparticles. For a proof of concept research in this manuscript, we modified the colloidal particles with streptavidin, and the as obtained nanoparticles were used to detect biotinylated protein via a binding and assembling strategy, which is impossible for conventional photonic crystal sensors. Not only qualitative and quantitative detections were achieved, but also the average diameters of the biotinylated protein were correctly estimated. These results have demonstrated a multipurpose detection feature of our proposed colorimetric sensor.

Download Full-text

Novel Approach for Fabricating Highly Ordered Colloidal Crystals using Fluorinated Solvent

MRS Proceedings ◽

10.1557/proc-1014-aa07-10 ◽

2007 ◽

Vol 1014 ◽

Author(s):

Satoshi Takeda ◽

Pierre Wiltzius

Keyword(s):

Photonic Crystals ◽

Colloidal Particles ◽

Colloidal Crystals ◽

Optical Devices ◽

Glass Slide ◽

Polystyrene Microspheres ◽

Novel Technique ◽

Colloidal Photonic Crystals ◽

Novel Approach ◽

Self Assembled

AbstractA novel technique for fabricating highly ordered colloidal photonic crystals has been developed. In this method, a droplet of water containing polystyrene microspheres was added to the surface of a fluorinated solvent bath. Consequently, the two liquids remained separated and the colloidal particles self-assembled into close-packed structures at the interface between them. By transferring the droplet onto a glass slide, a highly ordered crystal was obtained. This technique offers a new, potentially easier, and more effective approach than currently used. We believe that it will open new ways for fabricating materials based on colloidal crystals as well as applying the colloidal photonic crystals to optical devices.

Download Full-text

Dielectrophoretic Force-Induced Assembly Technique for the Fabrication of 2D Colloidal Photonic Crystals

Volume 6: Electronics and Photonics ◽

10.1115/imece2008-69094 ◽

2008 ◽

Author(s):

R. Asmatulu ◽

S. Kim ◽

F. Papadimitrakopoulos ◽

H. Marcus

Keyword(s):

Photonic Crystals ◽

Parallel Plate ◽

Colloidal Particles ◽

Experimental Tests ◽

Gold Electrodes ◽

Parallel Plates ◽

Dielectrophoretic Force ◽

Colloidal Photonic Crystals ◽

Assembly Technique ◽

Electro Osmotic Flow

Dielectrophoretic force-induced assembly technique was used to achieve close-packed 2D colloidal photonic crystals on parallel plate gold electrodes. These gold electrodes were patterned using conventional UV photolithography technique. The width and length of the parallel plates were 280 μm and 3 mm, respectively. The experimental tests conducted with 5.3 μm carboxyl functionalized polystyrene (PS) particles at various AC voltages, frequencies and particle concentrations showed that colloidal photonic crystals were fabricated on the ground electrode, instead of the working electrode, which may be attributed to the electro-osmotic flow and dipole-dipole attractions between the colloidal particles. It is concluded that this study provides promising results for the 2D colloidal photonic fabrication for the photonic industry.

Download Full-text

Fabrication of Photonic Crystals in Microchannels

MRS Proceedings ◽

10.1557/proc-817-l6.2 ◽

2004 ◽

Vol 817 ◽

Author(s):

Chun-Wen Kuo ◽

Hui-Mei Hsieh ◽

Jung-Chuan Ting ◽

Yi-Hong Cho ◽

Kung Hwa Wei ◽

...

Keyword(s):

Photonic Crystals ◽

Self Assembly ◽

Colloidal Particles ◽

Expansion Method ◽

Large Area ◽

Optical Components ◽

Colloidal Photonic Crystals ◽

Fabrication Procedure ◽

Evaporation Induced Self Assembly ◽

Easy Integration

AbstractWe have developed a fabrication procedure for growing photonic crystals in the lithographic defined microchannels, which enables easy integration with other planar optical components. This technique is based on the directed evaporation induced self-assembly of nanoparticles in the microchannels. Substrates with pre-patterned microchannels (30-100 μm wide) were dipped into solution of nanoparticles for several days. By controlling the evaporation rate, the meniscus contacting the microchannels will undergo evaporation-induced self-assembly. The capillary forces cause nanospheres to crystallize within the microchannels forming colloidal photonic crystals in the microchannels. Two types of colloidal particles, polystyrene and silica, have been employed to fabricate colloidal photonic crystals in the microchannels. Both types of colloidal particles were found to form large-area well-ordered colloidal single crystals in the microchannels. The optical reflection spectra from the (111) surfaces of the colloidal crystals formed by various sizes of nanoparticles have been measured. And the measured reflection peaks agree with the photonic bandgap calculated by the plane wave expansion method.

Download Full-text

From colloidal particles to photonic crystals: advances in self-assembly and their emerging applications

Chemical Society Reviews ◽

10.1039/d0cs00706d ◽

2021 ◽

Author(s):

Zhongyu Cai ◽

Zhiwei Li ◽

Serge Ravaine ◽

Mingxin He ◽

Yanlin Song ◽

...

Keyword(s):

Photonic Crystals ◽

Self Assembly ◽

Colloidal Particles ◽

State Of The Art ◽

The State ◽

Colloidal Photonic Crystals

This paper reviews the advances in the state-of-the-art colloidal self-assembly methods to fabricate colloidal photonic crystals and their emerging applications.

Download Full-text

Parallel-Plate Conductive Electrodes for the Fabrication of Larger 2D Colloidal Photonic Crystals

Journal of Fluids Engineering ◽

10.1115/1.3111257 ◽

2009 ◽

Vol 131 (5) ◽

Author(s):

R. Asmatulu ◽

S. Kim ◽

F. Papadimitrakopoulos ◽

H. Marcus

Keyword(s):

Photonic Crystals ◽

Parallel Plate ◽

Colloidal Particles ◽

Experimental Tests ◽

Colloidal System ◽

Dielectrophoretic Force ◽

Colloidal Photonic Crystals ◽

Assembly Technique ◽

Electro Osmotic Flow ◽

Lithography Technique

A new dielectrophoretic force-induced parallel-plate assembly technique was used to achieve close-packed 2D large colloidal photonic crystals on gold electrodes (∼200 nm thick). The electrodes were patterned on a glass substrate using a conventional UV lithography technique. The experimental tests conducted with 5.3 μm carboxyl functionalized polystyrene particles at various ac and dc voltages, frequencies, and particle concentrations showed that larger size (0.25×3 mm2) colloidal photonic crystals were fabricated on the ground electrode rather than on the working electrode. To date, this is the largest colloidal photonic crystal fabricated using this method. The reason behind this phenomenon can be attributed to the electro-osmotic flow in the colloidal system and dipole-dipole attractions between the colloidal particles.

Download Full-text

Fabrication and Defect Designs on DNA Linked 2-D Colloidal Photonic Crystals Using a Nd:YAG Pulsed Laser

MRS Proceedings ◽

10.1557/proc-0901-ra21-02 ◽

2005 ◽

Vol 901 ◽

Author(s):

Ramazan Asmatulu ◽

Sejong Kim ◽

Robin Bright ◽

Phillip Yu ◽

Fotios Papadimitrakopoulos ◽

...

Keyword(s):

Photonic Crystals ◽

Self Assembly ◽

Colloidal Particles ◽

Second Harmonic ◽

Pulsed Laser ◽

Single Strand ◽

Glass Substrates ◽

Hexagonal Close Packed ◽

Colloidal Photonic Crystals ◽

Self Assembled

AbstractControlled defects were created on DNA linked 2-D colloidal photonic crystals using a Nd:YAG pulsed laser. The 2-D photonic crystals were self-assembled using 1.8 μm polystyrene (PS) microspheres on functionalized glass substrates. To synthesize the hexagonal close packed crystalline samples, both substrate and particles attached single-strand DNA, sequence A on the substrate and sequence B on the particles. The DNA was hybridized using the DNA linker with complementary single-strand A’B’ that anchored the particles to the substrate during self-assembly. The 532 nm second harmonic wavelength beam of the pulsed Nd:YAG laser (1064 nm) with a pulse width of 10 ns was used for the removal of individual colloidal particles from the self assembled photonic crystals. In the present tests, the diameter of the laser beam was optically reduced from 7 mm to about 1.8 μm. Controlled line defects and geometrical shapes (e.g., hexagonal and triangle) were created in the 2D arrays in an aqueous medium.

Download Full-text

Liquid–liquid extraction: a universal method to synthesize liquid colloidal photonic crystals

Journal of Materials Chemistry C ◽

10.1039/c9tc05895h ◽

2020 ◽

Vol 8 (3) ◽

pp. 989-995 ◽

Cited By ~ 1

Author(s):

Chuan Wang ◽

Xin Zhang ◽

Huimin Zhu ◽

Qianqian Fu ◽

Jianping Ge

Keyword(s):

Photonic Crystals ◽

Extraction Method ◽

Room Temperature ◽

Colloidal Particles ◽

Liquid Extraction ◽

Universal Method ◽

Colloidal Photonic Crystals ◽

Liquid Liquid Extraction

A liquid–liquid extraction method is developed to produce liquid PCs at room temperature. The colloidal particles precipitate to form liquid PCs due to the extraction of solvent and the supersaturation of particles.

Download Full-text