Imprinted Photonic Hydrogels for the Size‐ and Shell‐Selective Recognition of Nanoparticles

Gam‐Derouich, Sarra; Bourdillon, C.; Chaouche, Soraya Lakhdar; Coolen, Laurent; Maître, Agnès; Mangeney, Claire; Schwob, Catherine

doi:10.1002/ange.201702540

Cited by 7 publications

(3 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…16 Intuitively, a perturbation of these parameters, affects the entire photonic crystal spectrum, and in turn its variation can be related to the stimuli such as pressure variations, 17 chemical analytes, 7,8,18−23 and pH. 24−26 Unlike inorganic mesoporous DBR sensors 9,10,21,27,28 and other porous photonic crystals, 29,30 polymer structures often play as dense membrane and molecular diffusion is ruled by the analyte solubility in the polymer matrices, making them interesting disposable sensors. 7 A comparison between these structures can be found in refs.…”

Section: ■ Introductionmentioning

confidence: 99%

Flory–Huggins Photonic Sensors for the Optical Assessment of Molecular Diffusion Coefficients in Polymers

Lova

Manfredi

Bastianini

et al. 2019

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The lack of cost-effective systems for the extensive assessment of air pollutants is a concern for health and safety in urban and industrial areas. The use of polymer thin films as labelfree colorimetric sensors featuring specific interactions with pollutants would then represent a paradigm shift in environmental monitoring and packaging technologies, allowing to assess air quality, formation of byproducts in closed environment, and the barrier properties of the polymer themselves. To this end, all-polymer distributed Bragg reflectors promises reliable transducers for chemical stimuli, and effective colorimetric label-free selective detectors. We show selectivity attained by specific interaction of the polymeric components with the analytes. Such interactions drive the analyte intercalation trough the polymer structure and its kinetics, converting it in a dynamic optical response which is at the basis of the Flory-Huggins photonic sensors. Additionally, we demonstrate that such optical response can be used to esteem the diffusion coefficients of small molecules within the polymer media via simple UV-Vis spectroscopy retrieving data comparable to those obtained with state of the art gravimetric procedures. These results pave the way to an innovative, simple, and lowcost detection method integrable to in-situ assessment of barrier polymers used for the encapsulation of optoelectronic devices, food packaging, and goods storage in general. Currently, barrier properties of polymer thin films to vapors and gas are assessed via gravimetric 1 and pressure decay methods, 2-4 or by optical techniques based on microscopy 5 and infrared absorption, 6 which remained substantially unchanged for the last few decades. These methods need dedicated equipment and cannot be performed in-situ. In this scenario, research for new low-cost, simpler, and portable technologies to gather lab-on-chip devices is strongly pursued. In these regards, sensors based on the optical response of polymer distributed Bragg reflectors (DBR) represent a possible revolution in the field due to the high responsivity to analytes in the vapor phase. 7-9 DBRs are planar photonic crystals made of media with different refractive index stacked to form a dielectric lattice. The interaction between light and DBRs induces frequency regions where light propagation is forbidden. These frequencies are called photonic band gaps (PBGs), and are easily detectable via simple reflectance or transmittance spectroscopy. 10 In analogy with the energy-gap of semiconductors, the PBG properties depend on the lattice structure. Then, dielectric contrast among the lattice components, lattice parameters, and the number of layers affect the optical features generated by the DBR photonic structure. 11 Intuitively, a perturbation of

show abstract

Section: ■ Introductionmentioning

confidence: 99%

Flory–Huggins Photonic Sensors for the Optical Assessment of Molecular Diffusion Coefficients in Polymers

Lova

Manfredi

Bastianini

et al. 2019

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…In addition, the pH of the test solution played an important role in the fluorescence properties of the imprinted paper chips because it had a significant effect on the spatial configuration of 2,4-D, surface charge, and fluorescence intensity of paper@QDs@MIPs. 42,43 Therefore, the binding ability of the sensor toward 2,4-D was changed at different pH values. Fig.…”

Section: Fluorescence Properties Of Imprinted Paper Chipmentioning

confidence: 99%

Deposition of CdTe quantum dots on microfluidic paper chips for rapid fluorescence detection of pesticide 2,4-D

Zhang

Jia

et al. 2019

Analyst

View full text Add to dashboard Cite

show abstract

“…Structural colors consisting of the nanoparticles can restrict the certain range of photon wavelength. Compared with conventional dyes and pigments colorants, structural colors have many advantages encompassing the cost‐effectiveness, high degree of light‐fastness, and environmental friendliness . Anisotropic particles with two different chemical and physical components districted on the same surface are called Janus particles .…”

mentioning

confidence: 99%

Janus Multicolored Photonic Crystal Beads for Real‐Time Magnetic Responsive Patterns

Huang

Cheng

Zhang

et al. 2019

Part & Part Syst Charact

View full text Add to dashboard Cite

Recently, obtaining Janus particles exhibiting structural color has become possible using microfluidics, [23,24] phase separation, [25] and vigorous stirring. [26] However, the process of preparing Janus structural colored particles (JSCPs) is complicated and difficult because of the long preparation period and inevitable defects. It remains a big challenge to generate high-performance JSCPs.Herein, we proposed a remarkably facile method to generate high-quality, angle-independent, and size controllable Janus structural colored beads (JSCBs) consisting of monodispersed colloidal nanoparticles and Fe 3 O 4 magnetic nanoparticles, which are divided on the same particle displaying different structural colors. When monodispersed colloidal nanoparticles arrange in a long-range order, the colloidal nanoparticles possess the obvious photonic bandgap and brilliant structural color. With the colloidal particles alone, coffee ring effect and incoherent scattering occur because of the heterogeneous surface tension and structural defects, thus the structural color of the Janus particles is often inconspicuous. However, with the introduction of PDMS as the precursor, the colloidal nano particles arrange extremely orderly because the void of JSCBs is filled with a high viscosity component, and the self-assembly gene rates vivid structural color. In this case, Fe 3 O 4 nanoparticles as the magnetic component with an average particle diameter of 20 nm were used to form the black face of JSCBs. Because of the large different densities of colloidal and magnetic nanoparticles, the anisotropic structure was gradually formed during the self-assembly process. In addition, the Fe 3 O 4 nanoparticles are attracted to the shifting magnetic field. According to preparing JSCBs with monodispersed colloidal nanoparticles and magnetic nanoparticles, we can develop a system that can store and express information with the switchable structural colors in response to the magnetic field.The basic procedure of the preparation of JSCBs is described in Figure 1. The precursor of the PDMS, Sylgard-184A, is the key point of the fast self-assembly of the colloidal nanoparticles. Sylgard-184A is a film with high transparency, viscosity, and hydrophobicity, which is inert to the hydrophilic colloidal nanoparticles because of the modified shell of polyacrylic acid. First, the Sylgard-184B, as the cross-linker of the PDMS, was Photonic Janus particles that can change colors in different stimuli have shown great promise in various applications, such as optical probes, catalyst supports, sensors, and display materials. However, it remains a challenge to produce Janus structural colored particles with a simple method. Inspired from ecsenius bicolors, a facile preparation of Janus structural colored beads (JSCBs) using sub-micrometer-sized colloidal particles and magnetic nanoparticles composed of Fe 3 O 4 is established. A mixed emulsion is prepared by monodispersed colloidal particles and magnetic nanoparticles and initiator of PDMS precursor. Subsequent self...

show abstract

Imprinted Photonic Hydrogels for the Size‐ and Shell‐Selective Recognition of Nanoparticles

Cited by 7 publications

References 37 publications

Flory–Huggins Photonic Sensors for the Optical Assessment of Molecular Diffusion Coefficients in Polymers

Flory–Huggins Photonic Sensors for the Optical Assessment of Molecular Diffusion Coefficients in Polymers

Deposition of CdTe quantum dots on microfluidic paper chips for rapid fluorescence detection of pesticide 2,4-D

Janus Multicolored Photonic Crystal Beads for Real‐Time Magnetic Responsive Patterns

Contact Info

Product

Resources

About