TY  - CONF
AU  - Nikolić, Nikolina
AU  - Radosavljević, Aleksandra
AU  - Spasojević, Jelena
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Kačarević-Popović, Zorica
PY  - 2022
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12493
AB  - Recently, the one of the fastest growing areas in materials sciences is the development of polymer-based smart materials, which can autonomously change their physical and/or chemical properties under external stimuli. Photoactuators as a class of smart materials that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest due to their potential applications in soft robotics, smart grippers, artificial muscles, and smart devices. Thermosensitive hydrogels with gold nanoparticles (AuNPs) are probably the most commonly used active layers. Under the visible light irradiation, the local photo-thermal shrinking is induced, which enables the external wireless remote control of hydrogels and photo-thermalmechanical motions such as bending, curling, and spiraling [1-3]. In this work, hydrogel nanocomposites based on thermosensitive poly(N-isopropylacrylamide) (PNiPAAm) and AuNPs were produced by radiolytic method. The presence of AuNPs,nanospheres and nanorods, incorporated into PNiPAAm hydrogel was confirmed by UV-Vis spectroscopy, XRD, TEM and SEM. The influence of different shapes of AuNPs on physicochemical properties of AuPNiPAAm hydrogel nanocomposites was investigated. Swelling and deswelling kinetics in water at 25C and 48C,respectively, indicate that all samples showed non-Fickian diffusion (both diffusion and polymer chains relaxation processes control the fluid transport). On the other hand, volume phase transition temperature (VPTT), can be adjusted by the incorporation of different shapes of AuNPs. It has been observed that VPTT decreases from 32.5 C for Au nanorods to 30.5Cfor Au nanospheres. Moreover, Au-PNiPAAm hydrogel nanocomposites possess an excellent -switchable electrical conductivity, especially in the case of Au nanorods.
C3  - The Miller Online Workshop on Radiation Chemistry : Programme and book of abstracts
T1  - Au-PNiPAAm hydrogel nanocomposites as photoactuators for direct optical to mechanical energy conversion
SP  - 86
EP  - 86
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12493
ER  - 

@conference{
author = "Nikolić, Nikolina and Radosavljević, Aleksandra and Spasojević, Jelena and Stamenović, Una and Vodnik, Vesna and Kačarević-Popović, Zorica",
year = "2022",
abstract = "Recently, the one of the fastest growing areas in materials sciences is the development of polymer-based smart materials, which can autonomously change their physical and/or chemical properties under external stimuli. Photoactuators as a class of smart materials that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest due to their potential applications in soft robotics, smart grippers, artificial muscles, and smart devices. Thermosensitive hydrogels with gold nanoparticles (AuNPs) are probably the most commonly used active layers. Under the visible light irradiation, the local photo-thermal shrinking is induced, which enables the external wireless remote control of hydrogels and photo-thermalmechanical motions such as bending, curling, and spiraling [1-3]. In this work, hydrogel nanocomposites based on thermosensitive poly(N-isopropylacrylamide) (PNiPAAm) and AuNPs were produced by radiolytic method. The presence of AuNPs,nanospheres and nanorods, incorporated into PNiPAAm hydrogel was confirmed by UV-Vis spectroscopy, XRD, TEM and SEM. The influence of different shapes of AuNPs on physicochemical properties of AuPNiPAAm hydrogel nanocomposites was investigated. Swelling and deswelling kinetics in water at 25C and 48C,respectively, indicate that all samples showed non-Fickian diffusion (both diffusion and polymer chains relaxation processes control the fluid transport). On the other hand, volume phase transition temperature (VPTT), can be adjusted by the incorporation of different shapes of AuNPs. It has been observed that VPTT decreases from 32.5 C for Au nanorods to 30.5Cfor Au nanospheres. Moreover, Au-PNiPAAm hydrogel nanocomposites possess an excellent -switchable electrical conductivity, especially in the case of Au nanorods.",
journal = "The Miller Online Workshop on Radiation Chemistry : Programme and book of abstracts",
title = "Au-PNiPAAm hydrogel nanocomposites as photoactuators for direct optical to mechanical energy conversion",
pages = "86-86",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12493"
}

Nikolić, N., Radosavljević, A., Spasojević, J., Stamenović, U., Vodnik, V.,& Kačarević-Popović, Z.. (2022). Au-PNiPAAm hydrogel nanocomposites as photoactuators for direct optical to mechanical energy conversion. in The Miller Online Workshop on Radiation Chemistry : Programme and book of abstracts, 86-86.
https://hdl.handle.net/21.15107/rcub_vinar_12493

Nikolić N, Radosavljević A, Spasojević J, Stamenović U, Vodnik V, Kačarević-Popović Z. Au-PNiPAAm hydrogel nanocomposites as photoactuators for direct optical to mechanical energy conversion. in The Miller Online Workshop on Radiation Chemistry : Programme and book of abstracts. 2022;:86-86.
https://hdl.handle.net/21.15107/rcub_vinar_12493 .

Nikolić, Nikolina, Radosavljević, Aleksandra, Spasojević, Jelena, Stamenović, Una, Vodnik, Vesna, Kačarević-Popović, Zorica, "Au-PNiPAAm hydrogel nanocomposites as photoactuators for direct optical to mechanical energy conversion" in The Miller Online Workshop on Radiation Chemistry : Programme and book of abstracts (2022):86-86,
https://hdl.handle.net/21.15107/rcub_vinar_12493 .

TY  - CONF
AU  - Nikolić, Nikolina
AU  - Spasojević, Jelena
AU  - Radosavljević, Aleksandra
AU  - Stamenović, Una
AU  - Vodnik, Vesna
AU  - Kačarević-Popović, Zorica
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/12488
AB  - In recent years, photoactuators as a class of smart materials that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest due to their potential applications in soft robotics, artificial muscles, and smart devices. Currently, the fabrication of photoactuators is mainly based on photothermal actuation mechanisms which include expansion/contraction, molecule sorption/desorption, and phase transition. Thermosensitive hydrogels with gold nanoparticles (AuNPs) are probably the most commonly used active layers that absorb light energy and convert it to thermal energy, causing reversible mechanical deformation such as bending, curling, and spiraling. This work describes hydrogel nanocomposite photoactuators based on AuNPs and thermosensitive poly(N-isopropylacrylamide) (Au-PNiPAAm), obtained by gamma irradiation. The different shapes of AuNPs were incorporated into PNiPAAm hydrogel, nanospheres with radius  5-10 nm and nanorods with aspect ratio  5 (radius  10 nm, length  50 nm). Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators were investigated in water at 25C and 48C, respectively. All samples showed non-Fickian diffusion (both diffusion and polymer chains relaxation processes control the fluid transport) indicating that incorporation of different shapes of AuNPs into matrices has no influence on the diffusion model. On the other hand, the volume phase transition temperature (VPTT) of photoactuators can be adjusted by the incorporation of different shapes of AuNPs. It has been observed that VPTT decreases from  32.5C for Au nanorods to  30.5C for Au nanospheres, causing a more pronounced photothermal effect in the case of nanospheres.
PB  - Belgrade : Materials Research Society of Serbia – MRS-Serbia
C3  - YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts
T1  - Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators obtained by gamma irradiation
SP  - 137
EP  - 137
UR  - https://hdl.handle.net/21.15107/rcub_vinar_12488
ER  - 

@conference{
author = "Nikolić, Nikolina and Spasojević, Jelena and Radosavljević, Aleksandra and Stamenović, Una and Vodnik, Vesna and Kačarević-Popović, Zorica",
year = "2021",
abstract = "In recent years, photoactuators as a class of smart materials that can produce a reversible mechanical deformation under light stimuli have attracted tremendous interest due to their potential applications in soft robotics, artificial muscles, and smart devices. Currently, the fabrication of photoactuators is mainly based on photothermal actuation mechanisms which include expansion/contraction, molecule sorption/desorption, and phase transition. Thermosensitive hydrogels with gold nanoparticles (AuNPs) are probably the most commonly used active layers that absorb light energy and convert it to thermal energy, causing reversible mechanical deformation such as bending, curling, and spiraling. This work describes hydrogel nanocomposite photoactuators based on AuNPs and thermosensitive poly(N-isopropylacrylamide) (Au-PNiPAAm), obtained by gamma irradiation. The different shapes of AuNPs were incorporated into PNiPAAm hydrogel, nanospheres with radius  5-10 nm and nanorods with aspect ratio  5 (radius  10 nm, length  50 nm). Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators were investigated in water at 25C and 48C, respectively. All samples showed non-Fickian diffusion (both diffusion and polymer chains relaxation processes control the fluid transport) indicating that incorporation of different shapes of AuNPs into matrices has no influence on the diffusion model. On the other hand, the volume phase transition temperature (VPTT) of photoactuators can be adjusted by the incorporation of different shapes of AuNPs. It has been observed that VPTT decreases from  32.5C for Au nanorods to  30.5C for Au nanospheres, causing a more pronounced photothermal effect in the case of nanospheres.",
publisher = "Belgrade : Materials Research Society of Serbia – MRS-Serbia",
journal = "YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts",
title = "Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators obtained by gamma irradiation",
pages = "137-137",
url = "https://hdl.handle.net/21.15107/rcub_vinar_12488"
}

Nikolić, N., Spasojević, J., Radosavljević, A., Stamenović, U., Vodnik, V.,& Kačarević-Popović, Z.. (2021). Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators obtained by gamma irradiation. in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts
Belgrade : Materials Research Society of Serbia – MRS-Serbia., 137-137.
https://hdl.handle.net/21.15107/rcub_vinar_12488

Nikolić N, Spasojević J, Radosavljević A, Stamenović U, Vodnik V, Kačarević-Popović Z. Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators obtained by gamma irradiation. in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts. 2021;:137-137.
https://hdl.handle.net/21.15107/rcub_vinar_12488 .

Nikolić, Nikolina, Spasojević, Jelena, Radosavljević, Aleksandra, Stamenović, Una, Vodnik, Vesna, Kačarević-Popović, Zorica, "Swelling and deswelling kinetics of Au-PNiPAAm hydrogel nanocomposite photoactuators obtained by gamma irradiation" in YUCOMAT 2021 : Twenty-second Annual Conference YUCOMAT 2021 : Programme and the Book of abstracts (2021):137-137,
https://hdl.handle.net/21.15107/rcub_vinar_12488 .