Customizing H3Sb3P2O14 nanosheet sensors by reversible vapor-phase amine intercalation

Däntl, Marie; Ganter, Pirmin; Szendrei‐Temesi, Katalin; Jiménez‐Solano, Alberto; Lotsch, Bettina V.

doi:10.1039/c9nh00434c

Cited by 4 publications

(13 citation statements)

References 62 publications

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“…Therefore, it is possible to recover the pristine structure applying a two‐step protocol to the n ‐octylamine containing transferred or patterned sample consisting of n ‐octylamine exchange with ethylamine and subsequent heat treatment. [ 17 ] This is supported by the fact that the sensing response of the regenerated transferred BS, which results in a red‐shift of the Bragg peak upon exposure to ethanol vapor, is very similar to that of the pristine sample (see Figure S4 in the Supporting Information) while the ethylamine intercalated one shows an increased response. Furthermore, scanning electron microscopy was conducted to show the morphology of the BS before and after intercalation and to determine if the BS integrity is maintained in a transferred, regenerated sample.…”

Section: Resultsmentioning

confidence: 71%

“…Therefore, different amines can be utilized to endow the BSs with hydrophilic or hydrophobic properties, which in turn changes the response towards different types of analytes. Since we have previously developed a method for flexible, postsynthetic exchange of primary alkylamines in H 3 Sb 3 P 2 O 14 ‐based thin films, [ 17 ] we applied this protocol to the transferred BSs, giving rise to a versatile platform for adaptable sensors. This was demonstrated exemplarily by exchanging the n ‐octylamine by ethylamine (1 m in ethanol).…”

Section: Resultsmentioning

confidence: 99%

“…Since micrometer scale patterning or pattern transfer of thin films has gained increasing research interest in the past few years, [22,[28][29][30] we applied a soft chemical lithography method including spatial amine intercalation for hydrophobization, which was reported previously on H 3 Sb 3 P 2 O 14 thin films. [17] Using this method on the BSs opens up the possibility of combining patterning and transfer in one step. Patterning experiments were performed with BSs (four bilayers of H 3 Sb 3 P 2 O 14 and TiO 2 ) deposited directly on glass substrates.…”

Section: Bragg Stack Patterningmentioning

confidence: 99%

“…[ 15 ] Specifically, the sensitivity towards certain vapors can be modified through intercalation of primary alkylamines, which also influences the overall hydrophobicity of the sample. [ 16,17 ] Combining this material with TiO 2 nanoparticles leads to highly reflective BSs that exhibit and enhance the properties of the inorganic nanosheets. [ 18,19 ]…”

Section: Introductionmentioning

confidence: 99%

“…Ultimately, this method can be utilized in combination with a previously reported patterning method to enable BS pattern transfer. [ 17 ]…”

Section: Introductionmentioning

confidence: 99%

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Transfer of 1D Photonic Crystals via Spatially Resolved Hydrophobization

Däntl

Guderley

Szendrei‐Temesi

et al. 2021

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1D photonic crystals (1DPCs) are well known from a variety of applications ranging from medical diagnostics to optical fibers and optoelectronics. However, large-scale application is still limited due to complex fabrication processes and bottlenecks in transferring 1DPCs to arbitrary substrates and pattern creation. These challenges were addressed by demonstrating the transfer of millimeter-to centimeter-scale 1DPC sensors comprised of alternating layers of H 3 Sb 3 P 2 O 14 nanosheets and TiO 2 nanoparticles based on a non-invasive chemical approach. By depositing the 1DPC on a sacrificial layer of lithium tin sulfide nanosheets and hydrophobizing only the 1DPC by intercalation of n-octylamine via the vapor phase the 1DPC can be detached from the substrate by immersing the sample in water. Upon exfoliation of the hydrophilic sacrificial layer, the freestanding 1DPC remains at the water-air interface. In a second step, it can be transferred to arbitrary surfaces such as curved glass. In addition, the transfer of patterned 1DPCs is demonstrated by combining the sacrificial layer approach with area-resolved intercalation and etching. The fact that the sensing capability of the 1DPC is not impaired and can be modified after transfer renders this method a generic platform for the fabrication of photonic devices.

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Section: Resultsmentioning

confidence: 71%

Section: Resultsmentioning

confidence: 99%

Section: Bragg Stack Patterningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Ultimately, this method can be utilized in combination with a previously reported patterning method to enable BS pattern transfer. [ 17 ]…”

Section: Introductionmentioning

confidence: 99%

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Transfer of 1D Photonic Crystals via Spatially Resolved Hydrophobization

Däntl

Guderley

Szendrei‐Temesi

et al. 2021

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Nanosheet‐Based Uneven Thin Film Exhibiting Angle‐Independent Structural Color and Its Application to Detection of Biogenic Amines

Haraguchi

Imai

Oaki

2022

Adv Materials Inter

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processes in the liquid phase. In general, monolayer nanosheets are extracted only from exfoliated materials through purification. The unique properties of monolayers have been extensively studied in previous works. [1,2,4,6,[8][9][10] In contrast, other exfoliated nanosheets thicker than monolayers, such as few-layers or multiple-layers, were not widely used for applications, such as sensors and catalysts. At the same time, such materials also have potential applications. [16][17][18][19][20] Therefore, the size, surface chemistry, and assembly state of nanosheets, including monolayers and few-layers, are important for device fabrication. Our group has previously studied the exfoliation of layered transition metal oxides in organic dispersion media through the formation of layered composites with the intercalation of organic guests. [21,22] Surface-modified nanosheets were obtained by exfoliation in an organic medium. The prediction models for the yield, size, and size distribution were constructed through the extraction of the descriptors by a combination of machine learning and chemical insight on small experimental data. [23][24][25][26][27][28] These predictors contributed to the efficient exploration of appropriate experimental conditions, such as host-guest-medium combinations that yield the monodispersed and polydispersed nanosheets. [26] In the present work, surface-modified nanosheets with polydispersed lateral sizes and thicknesses were used to prepare an uneven thin film exhibiting an angle-independent structural color (Figure 1). The corresponding host-guest-medium combinations were selected based on the prediction model.Exfoliated nanosheets have been used as building blocks for the production of composites, [29][30][31][32][33][34][35] such as layer-by-layer assemblies, gels, and organic-inorganic composites. However, nanosheets are not easy to organize into the aligned states, such as thin films and liquid crystals. Specific methods and optimized conditions are required to align the nanosheets because the evaporation of the dispersion media causes random aggregation. Thin films and liquid-crystalline assemblies exhibiting structural colors have been previously prepared by homogeneous stacking of monolayered nanosheets. [35][36][37][38][39][40][41] Structural colors have been applied in the detection of chemical vapors and mechanical stresses. [37][38][39]41] However, self-assembled thin films with homogeneous thickness exhibit angle-dependent structural colors. In previous works, the angle-independent structural color was

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