Atomic layer deposition of hafnium oxide on porous silicon to form a template for athermal SERS-active substrates

Girel, Kseniya; Burko, Aliaksandr; Zavatski, Siarhei; Barysiuk, A.; I., None Litvinova K.; Eganova, E. M.; Tarasov, A.; Novikov, D. L.; Dubkov, S. V.; Bandarenka, Hanna

doi:10.1007/s00339-023-06592-3

Cited by 4 publications

(6 citation statements)

References 38 publications

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“…Additionally, TMNs can exhibit plasmonic behavior in the visible and near-infrared range under certain conditions, such as variations in optical properties, chemical deposition, and structural size. 23,96–98…”

Section: Inorganic Semiconductor Sers-active Substratesmentioning

confidence: 99%

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Noble metal-free SERS: mechanisms and applications

Jin,

Zhang,

Yang

et al. 2024

Analyst

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Section: Inorganic Semiconductor Sers-active Substratesmentioning

confidence: 99%

“…97 Most importantly, HfN can provide a thermal effect; thus, a stable SERS signal of the analyte can be obtained. 98…”

Section: Inorganic Semiconductor Sers-active Substratesmentioning

confidence: 99%

Noble metal-free SERS: mechanisms and applications

Jin,

Zhang,

Yang

et al. 2024

Analyst

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“…Prior to this, each block was treated with a piranha solution, consisting of H 2 SO 4 :H 2 O 2 at a 3:1 volume ratio, and maintained at a temperature between 70-80 • C for 5 min to slightly roughen its surface for further improvement of metal coating adhesive strength. Ag nanoparticles were grown by the "silver mirror" method in a mixture of basic solution (4 mL), reducing solution (1 mL), and ethanol (1 mL) [11,25]. Basic and reducing solutions were water solutions of 0.07 M AgNO 3 , 0.2 M NaOH, 0.6 M NH 3 , and 0.4 M C 4 H 4 KNaO 6 •4H 2 O, respectively.…”

Section: Fabrication Of Sers-active Substratesmentioning

confidence: 99%

“…Wide band gap (WBG) semiconductors are other rather "fresh" materials that can potentially lead to engineering the SERS-active substrates possessing athermal and selfcleaning properties [11][12][13][14]. The first feature allows SERS measurements to be free of the thermal-induced destruction of analyte molecules, thus improving analysis reliability [11]. At the same time, the UV-facilitated cleaning of the SERS-active substrates which have passed through the analysis cycle is of high demand in affordability terms [14].…”

Section: Introductionmentioning

confidence: 99%

Ultraviolet Exposure Improves SERS Activity of Graphene-Coated Ag/ZrO2 Substrates

Bandarenka,

Burko,

Laputsko

et al. 2023

Crystals

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This study reveals a significant improvement in surface-enhanced Raman scattering (SERS) activity of Ag/ZrO2 substrates covered with a few-layer graphene preliminary exposed to ultraviolet (UV) light. The SERS-active substrates are formed by the “silver mirror” deposition of Ag nanoparticles on annealed zirconia blocks. The film composed of ~3 graphene layers is grown on copper foil by a chemical vapor deposition and then wet-transferred to the SERS-active substrates. The graphene-free Ag/ZrO2 samples are found to provide an enhancement of the Raman scattering from rhodamine 6G (R6G) at a micromolar concentration, which is associated with combined effects from the surface plasmon resonance in the Ag nanoparticles and a charge transfer facilitated by zirconium dioxide. It is revealed that the SERS signal from the analyte molecules can be suppressed by a UV exposure of the Ag/ZrO2 samples due to photocatalytic activity of the wide band gap semiconductor. However, if the samples are covered with a few-layer graphene (Gr/Ag/ZrO2) it prevents the dye molecule decomposition upon the UV treatment and improves SERS activity of the substrates. The 365 nm treatment leads to a 40% increase in the 10–6 M R6G SERS spectrum intensity, while the 254 nm irradiation causes it to rise by 47%, which is explained by different responses from the surface and bulk zirconia crystals to the short and long UV wavelengths. This enhancement is attributed to the distinct responses of surface and in-depth zirconia crystals to varied UV wavelengths and underscores the pivotal role of graphene as a protective and enhancing layer.

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“…Such regimens make it possible to form a nickel film of 800 nm thickness. The SERS-active coating was then fabricated on the nickel-coated macroPSi using the "silver mirror" method, which has been described elsewhere [29]. A solution was prepared by mixing 0.07 M AgNO 3 , 0.2 M NaOH, 0.6 M NH 3 , C 4 H 4 KNaO 6 •4H 2 O, and ethanol in a volume ratio of 4:1:1.…”

Section: Fabrication Of Sers-active Substratesmentioning

confidence: 99%

Improvement of Heat Dissipation in Ag/Ni Substrates for Testing Cu-TiO2/TiO2-Modified Filters Using SERS Spectroscopy

et al. 2023

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Surface-enhanced Raman scattering (SERS) spectroscopy is used to investigate a composition of wash swabs from the Cu-TiO2/TiO2-modified filters with disinfecting ability. Macroporous Si chips coated with conformal 800 nm thick Ni layer and Ag particles (Ag/Ni) are engineered to act as SERS-active substrates. Such substrates are characterized by a moderate reflection band in the visible range and provide an improved heat dissipation from contaminants in wash swabs during SERS study. This prevents thermal-induced destruction of analyzing media for reliable assessment of its composition. The anatase Cu-TiO2 and TiO2 nanoparticles are synthesized using the sol-gel method and characterized via Raman spectroscopy and X-ray diffractometry. The filters are modified with Cu-TiO2/TiO2 nanoparticles and embedded in three-valve facial masks that are worn by a volunteer to breathe for 4 h. Comparative SERS analysis of the filters shows that they slightly destroy chemical bonds in the molecules constituting airborne contaminations upon ceiling day lights, which can be associated with Cu-TiO2 photocatalytic activity. The filters additionally exposed to near-ultraviolet light prominently decrease the intensity of Raman signatures of airborne contaminant due to the presence of pure TiO2.

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Atomic layer deposition of hafnium oxide on porous silicon to form a template for athermal SERS-active substrates

Cited by 4 publications

References 38 publications

Noble metal-free SERS: mechanisms and applications

Noble metal-free SERS: mechanisms and applications

Ultraviolet Exposure Improves SERS Activity of Graphene-Coated Ag/ZrO2 Substrates

Improvement of Heat Dissipation in Ag/Ni Substrates for Testing Cu-TiO2/TiO2-Modified Filters Using SERS Spectroscopy

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