Optical interference effect corrections for absorbance spectra of layer-by-layer thin films bearing covalently bound dye

Saydjari, Andrew K.; Long, James P.; Dressick, Walter J.; Simpkins, Blake S.

doi:10.1016/j.cplett.2014.06.006

Cited by 7 publications

(6 citation statements)

References 35 publications

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“…Polyelectrolyte multilayers, prepared in a layer-by-layer (LbL) fashion by alternate treatments of a substrate with separate solutions of polycation and polyanion, are especially attractive vehicles for fabricating self-repairing materials. Such films are conformally deposited onto a substrate surface under ambient conditions in safe solvents, such as water, at low cost using simple equipment amenable to scale-up. , In addition, film composition can be varied by inclusion of other charged species, such as nanoparticles, − macromolecules, dyes, and quantum dots, among others, , that endow the film with multiple useful properties to enable new applications ranging from triggered chemical sensors , and drug delivery systems to tunable catalysis …”

Section: Introductionmentioning

confidence: 99%

Self-Healing Textile: Enzyme Encapsulated Layer-by-Layer Structural Proteins

Gaddes

Jung

Pena‐Francesch

et al. 2016

ACS Appl. Mater. Interfaces

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Self-healing materials, which enable an autonomous repair response to damage, are highly desirable for the long-term reliability of woven or nonwoven textiles. Polyelectrolyte layer-by-layer (LbL) films are of considerable interest as self-healing coatings due to the mobility of the components comprising the film. In this work mechanically stable self-healing films were fabricated through construction of a polyelectrolyte LbL film containing squid ring teeth (SRT) proteins. SRTs are structural proteins with unique self-healing properties and high elastic modulus in both dry and wet conditions (>2 GPa) due to their semicrystalline architecture. We demonstrate LbL construction of multilayers containing native and recombinant SRT proteins capable of self-healing defects. Additionally, we show these films are capable of utilizing functional biomolecules by incorporating an enzyme into the SRT multilayer. Urease was chosen as a model enzyme of interest to test its activity via fluorescence assay. Successful construction of the SRT films demonstrates the use of mechanically stable self-healing coatings, which can incorporate biomolecules for more complex protective functionalities for advanced functional fabrics.

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Section: Introductionmentioning

confidence: 99%

Self-Healing Textile: Enzyme Encapsulated Layer-by-Layer Structural Proteins

Gaddes

Jung

Pena‐Francesch

et al. 2016

ACS Appl. Mater. Interfaces

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“…Thin metal films (∼10 nm of Au) exhibit reflectance on the order of tens of percent in the visible resulting in unintended cavity effects in the visible. In fact, the refractive index contrast between micrometer-scale dielectric layers can significantly distort spectra and has even been shown to support strong coupling . It is possible to design mirrors composed of appropriately stacked dielectric materials that form infrared mirrors and are reasonably transparent in the visible (e.g., SiO 2 /Si 3 N 4 ) or correct for frequency-dependent transmission as a data postprocessing step .…”

Section: Experimental Difficulties and Pitfallsmentioning

confidence: 99%

“…In fact, the refractive index contrast between micrometer-scale dielectric layers can significantly distort spectra and has even been shown to support strong coupling . It is possible to design mirrors composed of appropriately stacked dielectric materials that form infrared mirrors and are reasonably transparent in the visible (e.g., SiO 2 /Si 3 N 4 ) or correct for frequency-dependent transmission as a data postprocessing step . Relying on the Rabi splitting itself as a gauge of coupled species concentration would appear to be robust since the dependence of Rabi splitting on the square root of absorber concentration has been predicted and verified multiple times. − However, there is some recent evidence, though not rigorously verified, that absorber frequency or transition moment could be altered under strong coupling.…”

Section: Experimental Difficulties and Pitfallsmentioning

confidence: 99%

Mode-Specific Chemistry through Vibrational Strong Coupling (or A Wish Come True)

Simpkins

Dunkelberger

2021

J. Phys. Chem. C

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Vibrational strong coupling offers newfound potential to affect chemical processes and represents a wholly new approach to catalysis. While this presents extraordinary opportunities in the areas of product-selective synthesis, pharmaceutical design and yield, energy generation and storage, and unique optical devices, there are a number of important obstacles, including a lack of mechanistic understanding, unconventional or misleading spectroscopic interpretations, and a shortage of corroborating evidence. Here, we present our perspective on opportunities, obstacles, and the most pressing work to be completed in order to establish the significant but challenging new field of quantum optical chemistry.

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“…The interaction between chitosan and SDS creates a very stable film ideal for this work's objective, moreover the cationic nature of chitosan easily adsorbs on the anodic surface of the SAM formed [20]. Layer-by-layer technique is a very simple and useful technique, it is performed without any particular requirements like temperature changes or by creating vacuum and it can be used with a large variety of polyelectrolytes [21,22]. As it can be observed in Fig.…”

Section: Electrode Manufacturing and Its Characterizationmentioning

confidence: 99%

Modified screen-printed electrode for the FIA-amperometric determination of 2-nitro-p-phenylenediamine

Huayhuas-Chipana

Foguel

Gonçalves

et al. 2017

Microchemical Journal

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This work presents the development of a modified sensor coupled to a flow injection analysis (FIA) system for the determination of 2-nitro-p-phenylenediamine, an important compound in hair dyes. To achieve this, a commercial screen-printed gold electrode (SPAuE) previously electrochemically treated to become nanostructured, was covered with a self-assembled monolayer (SAM) of 3-mercapto-1-propanesulfonate (MPS) and, subsequently, was covered by multilayers of chitosan, sodium dodecyl sulphonate (SDS) and nickel(II) phthalocyaninetetrasulfonic acid (NiPcTs) in a layer-by-layer technique to improve the sensor's sensibility. The analytical response of the proposed methodology was evaluated in batch by square wave voltammetry (SWV) and by amperometry coupled to a FIA system, with limits of detection of 1.2 and 1.6 μmol L −1 , respectively.

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Optical interference effect corrections for absorbance spectra of layer-by-layer thin films bearing covalently bound dye

Cited by 7 publications

References 35 publications

Self-Healing Textile: Enzyme Encapsulated Layer-by-Layer Structural Proteins

Self-Healing Textile: Enzyme Encapsulated Layer-by-Layer Structural Proteins

Mode-Specific Chemistry through Vibrational Strong Coupling (or A Wish Come True)

Modified screen-printed electrode for the FIA-amperometric determination of 2-nitro-p-phenylenediamine

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