Selective Enhancement of SERS Spectral Bands of Salicylic Acid Adsorbate on 2D Ti3C2Tx-Based MXene Film
Abstract
:1. Introduction
2. Materials and Methods
2.1. Synthesis of Ti3C2Tx MXene Substrates
2.2. Characterization of MXene Film and Its Interaction with Adsorbate
2.3. Computational Methods
3. Results
3.1. Characterization of MXene Films
3.2. Raman Spectra of MXene Films
3.3. Interaction between Salicylic Acid and MXenes
3.4. Computational Results of Salicylic Acid Interaction with MXene
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Sample | Atomic Ratio, % | |
---|---|---|
Aluminum (Al) | Titanium (Ti) | |
MAX phase (Ti3AlC2) | 39.39 ± 0.96 | 60.61 ± 0.96 |
MXenes (Ti3C2Tx) | 6.33 ± 1.97 | 93.67 ± 1.97 |
Vibrational Freq., cm−1 | Calculated Freq., cm−1 [49] | Assignments [49] | ||
---|---|---|---|---|
532 nm | 633 nm | 785 nm | ||
W | 129 | 120 | 128 | (Ti,C)ip, Ti3C2F2; ω1 |
198 | 198 | 199 | 190 | (Ti,F)oop, Ti3C2F2; ω2 |
257 | W | 258 | 231 | (F)ip, Ti3C2F2; ω5 |
287 | 281 | 280 | 278 | (OH)ip, Ti3C2(OH)2; ω5 |
390 | 371 | 366 | 347 | (O)ip, Ti3C2O2; ω5 |
W | 511 a | 513 b | 514 | (OH)oop, Ti3C2(OH)2; ω6 |
590 a | 589 a | 584 a | 586 | (O)oop, Ti3C2O2; ω6 |
621 | 620 | 615 | 622 | (C)ip, Ti3C2(OH)2; ω4 |
673 a | 667 a | 655 | 684 | (C)oop, Ti3C2(OH)2; ω3 |
715 | 709 a | 722 b | 730 | (C)oop, Ti3C2O2; ω3 |
W | W | W | D band | |
1550 | 1581 | 1520 a | G band |
Crystalline Salicylic Acid, Freq. cm−1 | Salicylic Acid on MXenes, Freq. cm−1 | Assignments |
---|---|---|
180 | - | δoop(C-COOH) |
258 | - | δip(C-COOH) |
286 | - | δip(C-OH) |
452 | - | δip(C-COOH) |
- | 473 | δoop(ring) + δoop (OH) |
534 | - | δoop(ring) |
568 | - | δoop(O-H) a + δoop(ring) |
- | 595 | δip(C-C, ring)+ δoop(OH) |
657 | 654 ↑ | δip(-COOH) + δoop(ring) |
705 | 681 ↑ | δoop(ring) + δoop(O-H) a |
773 | - | δip(C-H) a + 6 c |
850 | 861 | ν(C-OH) b+ δip(ring) |
876 | 896 ↑ | δoop(C-H); 17 c |
1031 | 1031 | 18 c? |
1093 | δ(O-H) b | |
1154 | 1145 | δ(O-H) a |
1164 | - | 15 c |
1244 | 1232 | δ(O-H) a + ν(C-COOH) |
1307 | - | δ(O-H) a |
1325 | 1311 | δ(C-O) b |
1386 | 1397 | 14 c + δ(C-O) b |
1473 | 1467 | 19 c |
1583 | 1567 | 8 c |
1636 | 1597 ↓ | ν(C=O) a |
Substrate Material | Excitation | Enhancement Factor |
---|---|---|
Citrate-stabilized AgNPs | 1064 nm | 2.5 × 104 |
Polymer-stabilized AgNPs | 1064 nm | 1.2 × 104 |
Citrate-stabilized AuNPs | 1064 nm | 2.5 × 103 |
Polymer-stabilized AuNPs | 1064 nm | 3.8 × 103 |
Ti3C2Tx MXene | 532 nm | 2.2 × 102 |
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Adomavičiūtė-Grabusovė, S.; Ramanavičius, S.; Popov, A.; Šablinskas, V.; Gogotsi, O.; Ramanavičius, A. Selective Enhancement of SERS Spectral Bands of Salicylic Acid Adsorbate on 2D Ti3C2Tx-Based MXene Film. Chemosensors 2021, 9, 223. https://doi.org/10.3390/chemosensors9080223
Adomavičiūtė-Grabusovė S, Ramanavičius S, Popov A, Šablinskas V, Gogotsi O, Ramanavičius A. Selective Enhancement of SERS Spectral Bands of Salicylic Acid Adsorbate on 2D Ti3C2Tx-Based MXene Film. Chemosensors. 2021; 9(8):223. https://doi.org/10.3390/chemosensors9080223
Chicago/Turabian StyleAdomavičiūtė-Grabusovė, Sonata, Simonas Ramanavičius, Anton Popov, Valdas Šablinskas, Oleksiy Gogotsi, and Arūnas Ramanavičius. 2021. "Selective Enhancement of SERS Spectral Bands of Salicylic Acid Adsorbate on 2D Ti3C2Tx-Based MXene Film" Chemosensors 9, no. 8: 223. https://doi.org/10.3390/chemosensors9080223