Photoactive/Passive Molecular Glass Blends: An Efficient Strategy to Optimize Azomaterials for Surface Relief Grating Inscription

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Photoactive/Passive Molecular Glass Blends : An Efficient Strategy to Optimize Azomaterials for Surface Relief Grating Inscription. / Laventure, Audrey; Bourotte, Jeremie; Vapaavuori, Jaana; Karperien, Lucas; Sabat, Ribal Georges; Lebel, Olivier; Pellerin, Christian.

julkaisussa: ACS Applied Materials and Interfaces, Vuosikerta 9, Nro 1, 11.01.2017, s. 798-808.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Laventure, Audrey ; Bourotte, Jeremie ; Vapaavuori, Jaana ; Karperien, Lucas ; Sabat, Ribal Georges ; Lebel, Olivier ; Pellerin, Christian. / Photoactive/Passive Molecular Glass Blends : An Efficient Strategy to Optimize Azomaterials for Surface Relief Grating Inscription. Julkaisussa: ACS Applied Materials and Interfaces. 2017 ; Vuosikerta 9, Nro 1. Sivut 798-808.

Bibtex - Lataa

@article{52a17c1be6f6457ea38fdb59271a0e1c,
title = "Photoactive/Passive Molecular Glass Blends: An Efficient Strategy to Optimize Azomaterials for Surface Relief Grating Inscription",
abstract = "Irradiation of azomaterials causes various photophysical and photomechanical effects that can be exploited for the preparation of functional materials such as surface relief gratings (SRGs). Herein, we develop and apply an efficient strategy to optimize the SRG inscription process by decoupling, for the first time, the important effects of the azo content and glass transition temperature (T-g). We prepare blends of a photoactive molecular glass functionalized with the azo Disperse Red 1 (gDR1) with a series of analogous photopassive molecular glasses. Blends with 10 and 40 mol {\%} of gDR1 are completely miscible, present very similar optical properties, and cover a wide range of Tg from below to well above ambient temperature. SRG inscription experiments show that the diffraction efficiency (DE), residual DE, and initial inscription rate reach a maximum when Tg is 25-40 degrees C above ambient temperature for low to high azo content, respectively. Indeed, for a fixed 40 mol {\%} azo content, choosing the optimal T-g enables doubling the SRG inscription rate and increasing DE 6-fold. Moreover, a higher azo content enables higher DE for a similar T-g. Spectroscopy measurements indicate that the photo orientation of DR1 and its thermal stability are maximal with Tg around 70 degrees C, independent of the azo content. We conclude that the SRG potential of azomaterials depends on their capability to photo-orient but that the matrix rigidity eventually limits the inscription kinetics, leading to an optimal T-g that depends on the azo content. This study exposes clear material design guidelines to optimize the SRG inscription process and the photoactivity of azomaterials.",
keywords = "surface relief grating, photoactive materials, azobenzene, molecular glasses, glass transition temperature, photoinduced orientation, AZO-POLYMER-FILMS, REVERSIBLE OPTICAL STORAGE, MASS-TRANSPORT, THIN-FILMS, AZOBENZENE, ORIENTATION, LIGHT, SIDE, DERIVATIVES, ANISOTROPY",
author = "Audrey Laventure and Jeremie Bourotte and Jaana Vapaavuori and Lucas Karperien and Sabat, {Ribal Georges} and Olivier Lebel and Christian Pellerin",
year = "2017",
month = "1",
day = "11",
doi = "10.1021/acsami.6b11849",
language = "English",
volume = "9",
pages = "798--808",
journal = "ACS Applied Materials and Interfaces",
issn = "1944-8244",
publisher = "AMERICAN CHEMICAL SOCIETY",
number = "1",

}

RIS - Lataa

TY - JOUR

T1 - Photoactive/Passive Molecular Glass Blends

T2 - An Efficient Strategy to Optimize Azomaterials for Surface Relief Grating Inscription

AU - Laventure, Audrey

AU - Bourotte, Jeremie

AU - Vapaavuori, Jaana

AU - Karperien, Lucas

AU - Sabat, Ribal Georges

AU - Lebel, Olivier

AU - Pellerin, Christian

PY - 2017/1/11

Y1 - 2017/1/11

N2 - Irradiation of azomaterials causes various photophysical and photomechanical effects that can be exploited for the preparation of functional materials such as surface relief gratings (SRGs). Herein, we develop and apply an efficient strategy to optimize the SRG inscription process by decoupling, for the first time, the important effects of the azo content and glass transition temperature (T-g). We prepare blends of a photoactive molecular glass functionalized with the azo Disperse Red 1 (gDR1) with a series of analogous photopassive molecular glasses. Blends with 10 and 40 mol % of gDR1 are completely miscible, present very similar optical properties, and cover a wide range of Tg from below to well above ambient temperature. SRG inscription experiments show that the diffraction efficiency (DE), residual DE, and initial inscription rate reach a maximum when Tg is 25-40 degrees C above ambient temperature for low to high azo content, respectively. Indeed, for a fixed 40 mol % azo content, choosing the optimal T-g enables doubling the SRG inscription rate and increasing DE 6-fold. Moreover, a higher azo content enables higher DE for a similar T-g. Spectroscopy measurements indicate that the photo orientation of DR1 and its thermal stability are maximal with Tg around 70 degrees C, independent of the azo content. We conclude that the SRG potential of azomaterials depends on their capability to photo-orient but that the matrix rigidity eventually limits the inscription kinetics, leading to an optimal T-g that depends on the azo content. This study exposes clear material design guidelines to optimize the SRG inscription process and the photoactivity of azomaterials.

AB - Irradiation of azomaterials causes various photophysical and photomechanical effects that can be exploited for the preparation of functional materials such as surface relief gratings (SRGs). Herein, we develop and apply an efficient strategy to optimize the SRG inscription process by decoupling, for the first time, the important effects of the azo content and glass transition temperature (T-g). We prepare blends of a photoactive molecular glass functionalized with the azo Disperse Red 1 (gDR1) with a series of analogous photopassive molecular glasses. Blends with 10 and 40 mol % of gDR1 are completely miscible, present very similar optical properties, and cover a wide range of Tg from below to well above ambient temperature. SRG inscription experiments show that the diffraction efficiency (DE), residual DE, and initial inscription rate reach a maximum when Tg is 25-40 degrees C above ambient temperature for low to high azo content, respectively. Indeed, for a fixed 40 mol % azo content, choosing the optimal T-g enables doubling the SRG inscription rate and increasing DE 6-fold. Moreover, a higher azo content enables higher DE for a similar T-g. Spectroscopy measurements indicate that the photo orientation of DR1 and its thermal stability are maximal with Tg around 70 degrees C, independent of the azo content. We conclude that the SRG potential of azomaterials depends on their capability to photo-orient but that the matrix rigidity eventually limits the inscription kinetics, leading to an optimal T-g that depends on the azo content. This study exposes clear material design guidelines to optimize the SRG inscription process and the photoactivity of azomaterials.

KW - surface relief grating

KW - photoactive materials

KW - azobenzene

KW - molecular glasses

KW - glass transition temperature

KW - photoinduced orientation

KW - AZO-POLYMER-FILMS

KW - REVERSIBLE OPTICAL STORAGE

KW - MASS-TRANSPORT

KW - THIN-FILMS

KW - AZOBENZENE

KW - ORIENTATION

KW - LIGHT

KW - SIDE

KW - DERIVATIVES

KW - ANISOTROPY

U2 - 10.1021/acsami.6b11849

DO - 10.1021/acsami.6b11849

M3 - Article

VL - 9

SP - 798

EP - 808

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

SN - 1944-8244

IS - 1

ER -

ID: 32394541