Hydrophilic–Hydrophobic Patterned Molecularly Imprinted Photonic Crystal Sensors for High‐Sensitive Colorimetric Detection of Tetracycline

Hou, Jue; Zhang, Huacheng; Yang, Qiang; Li, Mingzhu; Jiang, Lei; Song, Yanlin

doi:10.1002/smll.201403640

Cited by 193 publications

(135 citation statements)

References 48 publications

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“…Chip-based devices have been used for the ultra-trace detection of analytes (Hou et al, 2014;Hou et al, 2015), and the development of a nucleic acid-based microarray is particularly useful for high-throughput detection and profiling of miRNA targets. The small size of miRNAs, however, poses a major challenge toward developing a reliable assay.…”

Section: Introductionmentioning

confidence: 99%

A microarray platform for detecting disease-specific circulating miRNA in human serum

Roy

Soh

Ying

2016

Biosensors and Bioelectronics

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Section: Introductionmentioning

confidence: 99%

A microarray platform for detecting disease-specific circulating miRNA in human serum

Roy

Soh

Ying

2016

Biosensors and Bioelectronics

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“…[24][25] Selfassembled colloidal crystals have been widely used as structural templates in fabricating macroporous photonic crystals with periodic arrays of air cavities embedded in the matrix material (e.g., polymer, metal, and semiconductor). 19, [25][26][27][28][29] The stringent submicrometer-scale lattice spacing requirement for making visible-and NIR-active 3D photonic crystals can be easily satisfied by controlling the size of the templating colloidal particles. 28 Another major merit of the current technology is the employment of new pressure-sensitive SMPs that enable the direct writing of arbitrary 3D macroporous photonic crystal patterns on the polymer surface in a single step.…”

Section: Introductionmentioning

confidence: 99%

Direct Writing of Three-Dimensional Macroporous Photonic Crystals on Pressure-Responsive Shape Memory Polymers

Fang

Leo

et al. 2015

ACS Appl. Mater. Interfaces

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Here we report a single-step direct writing technology for making three-dimensional (3D) macroporous photonic crystal patterns on a new type of pressure-responsive shape memory polymer (SMP). This approach integrates two disparate fields that do not typically intersect: the well-established templating nanofabrication and shape memory materials. Periodic arrays of polymer macropores templated from self-assembled colloidal crystals are squeezed into disordered arrays in an unusual shape memory "cold" programming process. The recovery of the original macroporous photonic crystal lattices can be triggered by direct writing at ambient conditions using both macroscopic and nanoscopic tools, like a pencil or a nanoindenter. Interestingly, this shape memory disorder-order transition is reversible and the photonic crystal patterns can be erased and regenerated hundreds of times, promising the making of reconfigurable/rewritable nanooptical devices. Quantitative insights into the shape memory recovery of collapsed macropores induced by the lateral shear stresses in direct writing are gained through fundamental investigations on important process parameters, including the tip material, the critical pressure and writing speed for triggering the recovery of the deformed macropores, and the minimal feature size that can be directly written on the SMP membranes. Besides straightforward applications in photonic crystal devices, these smart mechanochromic SMPs that are sensitive to various mechanical stresses could render important technological applications ranging from chromogenic stress and impact sensors to rewritable high-density optical data storage media.

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“…The target might associate with the polymer using intermolecular forces such as hydrogen bonding, 10 hydrophobic and electrostatic interactions. 11,12 Even after removing the template molecule, the recognition cavities still remain in shape for rebinding.…”

Section: Introductionmentioning

confidence: 99%

Improving molecularly imprinted nanogels by pH modulation

Zhang

Liu

2015

RSC Adv.

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Molecularly imprinted polymers (MIPs) are polymerized in the presence of a template molecule. After removing the template, the polymer scaffold can selectively rebind the template. Imprinting factor (IF) refers to the rebinding ratio of imprinted and non-imprinted polymers. Generally, the IF of most reported MIPs are still quite low (e.g. below 3.0). This is partially attributable to strong non-specific interactions.In this study, imprinted nanogels are prepared using two common dyes as templates, sulforhodamine B (SRhB) and fluorescein. By varying the buffer pH, non-specific electronic interactions between the template and the gels are reduced, leading to improved IF for the SRhB-MIPs from 1.5 (at pH 7.2) to 7.4 (at pH 9.0). At the same time, the binding capacity of the MIP remained similar. On the other hand, while pH tuning also improved the IF of the fluorescein-imprinted nanogels, the binding capacity dropped significantly. Using isothermal titration calorimetry (ITC), the SRhB-imprinted nanogels display a much higher affinity (Ka = 2.9 ×10 4 M -1 ) than the non-imprinted (Ka = 0.031 ×10 4 M -1 ) when rebinding is conducted in high pH (pH 9.0). This difference is mainly driven by enthalpy. This study suggests that pH tuning can be used to further improve MIPs.3

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Hydrophilic–Hydrophobic Patterned Molecularly Imprinted Photonic Crystal Sensors for High‐Sensitive Colorimetric Detection of Tetracycline

Cited by 193 publications

References 48 publications

A microarray platform for detecting disease-specific circulating miRNA in human serum

A microarray platform for detecting disease-specific circulating miRNA in human serum

Direct Writing of Three-Dimensional Macroporous Photonic Crystals on Pressure-Responsive Shape Memory Polymers

Improving molecularly imprinted nanogels by pH modulation

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