TY - JOUR

T1 - Just laser irradiation of silver benzoate water solution — A direct way of Ag nanofibers synthesis for broadband SERS detection

AU - Bikbaeva, Gulia

AU - Belhadi, Ahmed

AU - Pankin, Dmitriy

AU - Mamonova, Daria

AU - Kolesnikov, Ilya

AU - Petrov, Yuri

AU - Ivanova, Tatiana

AU - Ivanov, Denis

AU - Manshina, Alina

PY - 2023/10/1

Y1 - 2023/10/1

N2 - Highly efficient, homogeneous and reproducible substrates for surface enhanced Raman spectroscopy (SERS) are in high demand for practical broadband sensing and the detection of various analytes. The most promising SERS structures in terms of morphology are nanofibers, forming homogeneous coatings with broadband electric field enhancement. However, existing synthesis methods for the formation of nanofibers are multistage, requiring the preliminary synthesis of templates, using additional components, such as surfactants and capping agents, species extraction from the reaction mixture, washing and sedimentation onto a substrate. Here, we present a simple and scalable synthesis approach allowing the fabrication of long winding silver nanofibers directly on a substrate surface, without any additional stages. The process proposed is ecologically friendly and based on laser irradiation of a substrate–solution interface using a low intensity continuous wave unfocused laser beam with a wavelength of 448 nm. As the liquid phase, a silver benzoate water solution without any additional chemicals was used. The deposited nanofibers formed a continuous coating with an area corresponding to the laser beam, ca. 3 mm2, and were characterized by an enhancement factor as high as 107 in the broad spectral region, a low experimental detection limit of 10−11 M and high reproducibility of the SERS signal with a variation of ∼10%.

AB - Highly efficient, homogeneous and reproducible substrates for surface enhanced Raman spectroscopy (SERS) are in high demand for practical broadband sensing and the detection of various analytes. The most promising SERS structures in terms of morphology are nanofibers, forming homogeneous coatings with broadband electric field enhancement. However, existing synthesis methods for the formation of nanofibers are multistage, requiring the preliminary synthesis of templates, using additional components, such as surfactants and capping agents, species extraction from the reaction mixture, washing and sedimentation onto a substrate. Here, we present a simple and scalable synthesis approach allowing the fabrication of long winding silver nanofibers directly on a substrate surface, without any additional stages. The process proposed is ecologically friendly and based on laser irradiation of a substrate–solution interface using a low intensity continuous wave unfocused laser beam with a wavelength of 448 nm. As the liquid phase, a silver benzoate water solution without any additional chemicals was used. The deposited nanofibers formed a continuous coating with an area corresponding to the laser beam, ca. 3 mm2, and were characterized by an enhancement factor as high as 107 in the broad spectral region, a low experimental detection limit of 10−11 M and high reproducibility of the SERS signal with a variation of ∼10%.

KW - Hot spots

KW - Laser-induced deposition

KW - Silver nanofibers

KW - broadband SERS

UR - https://www.mendeley.com/catalogue/aefbffe1-297f-3c79-baef-d4d685eae051/

U2 - 10.1016/j.nanoso.2023.101037

DO - 10.1016/j.nanoso.2023.101037

M3 - Article

VL - 36

JO - Nano-Structures and Nano-Objects

JF - Nano-Structures and Nano-Objects

SN - 2352-507X

M1 - 101037

ER -