Surface-Enhanced Raman scattering of methylene blue on titanium nitride nanoparticles synthesized by laser ablation in organic solvents

Esmaeilzadeh, Marzieh; Dizajghorbani-Aghdam, Hossein; Malekfar, Rasoul

doi:10.1016/j.saa.2021.119721

Cited by 16 publications

(7 citation statements)

References 72 publications

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“…However, as displayed in Figure b, the 10 min doped product has a new phase with an interplanar distance of 0.214 nm and a size of <10 nm. According to other reports, , this new phase should be the nanosized TiN crystal showing the plane of (200). The appearance of TiN can also be determined by the further XPS and Raman results.…”

Section: Resultsmentioning

confidence: 77%

“…It can be seen for the N-doped products that after plasma treatment for 1, 3, and 5 min, their peaks at ∼417 and ∼618 cm −1 did not change greatly, but peaks for the Ndoped product after treatment for 10 min shifted to ∼404.95 and ∼605.74 cm −1 , which is attributed to the formation of TiN. 34,35 On the basis of the results of Figure S4b and Table 1, it can be seen that the atomic percentage of N increases from 3.92% to 13.87% with prolonged nitriding time, indicating the longer the nitriding time is, the higher concentration of N. Meanwhile, the F percentage almost exhibits a decreasing tendency, suggesting prolonging plasma treatment leads to a severe desorption of the −F functional group. To deeply understand the chemical environment of N-doped Ti 3 C 2 T x , peak assignments on Ti 2p and N 1s were performed, as displayed in Figure 3 as well as Figures S5 and S6.…”

Section: Resultsmentioning

confidence: 89%

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Nitrogen-Doped Ti₃C₂T_x MXene Induced by Plasma Treatment with Enhanced Microwave Absorption Properties

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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Ti3C2T x has microwave absorption (MA) properties due to its dielectric loss, but the absence of magnetic loss capability of pure Ti3C2T x causes unmatched impedance and unsatisfied MA performance. Modification of Ti3C2T x with magnetic particles is an effective way to introduce the magnetic loss mechanism. However, these modified Ti3C2T x particles have higher density and require complicated fabrication processes, restricting the industrial production and functional applications. Here, a low-temperature and simple method of radio-frequency N2 plasma treatment was adopted to modify Ti3C2T x with N. More interestingly, the N-doped Ti3C2T x flakes demonstrated magnetic properties and thus exhibited drastically enhanced MA properties. The minimum reflection loss (RLmin) of −59.20 dB at 10.56 GHz was achieved in N-doped Ti3C2T x products after only 3 min of plasma treatment, remarkably higher than RLmin of −11.07 dB at 7.92 GHz for the pristine Ti3C2T x . The main mechanism is due to the combination of dielectric loss, magnetic loss, and the good impedance matching in the N-doped Ti3C2T x . Further prolonging the nitriding time induces much desorption of −F and the formation of TiO2, thus deteriorating the impedance matching and the MA properties.

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Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 89%

Nitrogen-Doped Ti₃C₂T_x MXene Induced by Plasma Treatment with Enhanced Microwave Absorption Properties

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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“…The significantly high SERS enhancement from the Ti–TiN–Ag 50 nm is due to a variety of factors. Firstly, the TiN can excite surface plasmon resonance resulting in a strong EM field 19 . Second, due to the increased surface area of the branched titanium nanorods and the annealed film thickness of the TiN, the large surface area of Ti–TiN is conductive for adsorbing sufficient analyte molecules.…”

Section: Resultsmentioning

confidence: 99%

“…For our investigations, we choose methylene blue (MB) as the probe molecule. MB has been widely used by many research groups 19 – 25 and is extensively applied in industries and household products since it has a high Raman signal and can be easily adsorbed on the metal surface. The results indicate that the branched Ti nanorod treated in a nitrogen atmosphere and coated with 50 nm of Ag exhibit the highest SERS enhancement.…”

Section: Introductionmentioning

confidence: 99%

Design of high SERS sensitive substrates based on branched Ti nanorods

Yussuf

Jung

et al. 2022

Sci Rep

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This paper reports a rational design of branched titanium (Ti) nanorods formed by glancing angle physical vapor deposition and their applications as substrates for surface-enhanced Raman scattering (SERS). Ti nanorods with branches have larger surface areas than non-branched nanorods. However, Ti surface oxidizes easily resulting in very little SERS effect. The SERS sensitivity of the branched titanium nanorod is improved by annealing Ti nanorods in nitrogen in an effort to reduce oxidation. Additionally, the plasmonic resonance of the branched titanium nanorod is further improved by coating the top of the nanorods and branches with silver (Ag). The sensitivity of the SERS substrates is about 3700% that of as-deposited branched Ti nanorods with a native oxide layer. Our investigation provides a mechanism to fabricate sensitive SERS sensors of Ti nanorods that are known to be thermally and chemically stable and compatible with silicon-based electronics.

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“…With the advantages of excellent conductivity, high hardness, and superior stability, transition-metal nitrides (TMNs) are widely applied in catalysis, energy storage, and medicine [42][43][44][45]. In recent years, TMNs have also been reported to be the SERS substrates [46][47][48][49][50]. For instance, Guan et al reported that ultrathin δ-MoN nanosheets were synthesized via a solution route at 270 o C and 12 atm, and the Raman EF of these nanosheets is determined to 8.16 × 10 6 [46].…”

Section: Introductionmentioning

confidence: 99%

Structural engineering of transition-metal nitrides for surface-enhanced Raman scattering chips

Lan

Yao

et al. 2021

Nano Res.

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Noble-metal-free surface-enhanced Raman scattering (SERS) substrates have attracted great attention for their abundant sources, good signal uniformity, superior biocompatibility, and high chemical stability. However, the lack of controllable synthesis and fabrication of noble-metal-free substrates with high SERS activity impedes their practical applications. Herein, we propose a general strategy to fabricate a series of planar transition-metal nitride (TMN) SERS chips via an ambient temperature sputtering deposition route. These planar TMN (tungsten nitride, tantalum nitride, and molybdenum nitride) chips show remarkable Raman enhancement factors (EFs) with ~10 5 owing to efficient photoinduced charge transfer process between TMN chips and probe molecules. Further, structural engineering of 2 these TMN chips is used to improve their SERS activity. Benefiting from the synergistic effect of charge transfer process and electric field enhancement by constructing nanocavity structure, the Raman EF of WN nanocavity chips could be greatly improved to ∼1.29 × 10 7 , which is an order of magnitude higher than that of planar chips. Moreover, we also design the WN/monolayer MoS2 heterostructure chips. With the increase of surface electron density on the upper WN and more exciton resonance transitions in the heterostructure, a ∼1.94 × 10 7 level EF and a 5 × 10 -10 M level detention limit could be achieved. Our results provide important guidance for the structural design of ultrasensitive noble-metal-free SERS chips.

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Surface-Enhanced Raman scattering of methylene blue on titanium nitride nanoparticles synthesized by laser ablation in organic solvents

Cited by 16 publications

References 72 publications

Nitrogen-Doped Ti₃C₂T_x MXene Induced by Plasma Treatment with Enhanced Microwave Absorption Properties

Nitrogen-Doped Ti₃C₂T_x MXene Induced by Plasma Treatment with Enhanced Microwave Absorption Properties

Design of high SERS sensitive substrates based on branched Ti nanorods

Structural engineering of transition-metal nitrides for surface-enhanced Raman scattering chips

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Surface-Enhanced Raman scattering of methylene blue on titanium nitride nanoparticles synthesized by laser ablation in organic solvents

Cited by 16 publications

References 72 publications

Nitrogen-Doped Ti3C2Tx MXene Induced by Plasma Treatment with Enhanced Microwave Absorption Properties

Nitrogen-Doped Ti3C2Tx MXene Induced by Plasma Treatment with Enhanced Microwave Absorption Properties

Design of high SERS sensitive substrates based on branched Ti nanorods

Structural engineering of transition-metal nitrides for surface-enhanced Raman scattering chips

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Product

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Nitrogen-Doped Ti₃C₂T_x MXene Induced by Plasma Treatment with Enhanced Microwave Absorption Properties

Nitrogen-Doped Ti₃C₂T_x MXene Induced by Plasma Treatment with Enhanced Microwave Absorption Properties