Aromatic Amines

Raman Spectra Wavenumber (cm⁻¹)

SERS Spectra Wavenumber (cm⁻¹)

Au Nanostars

Enhancement Factor

Au Nanospheres

Enhancement Factor

Klarite Enhancement Factor

Theo.

Expt.

Theo.

Expt.

Aniline

575

830

1010

1047/1179/1200

1297

1625/1644/1663

540

824

1007

1036/1161/1185

1286

1598/1613/1626

1046

812

1015

1048/1185/1201

1235

1643/1642/1651

996

824

960

1025/1144/1172

1214

1558/1571/1592

3.98 × 10³

8.18 × 10¹

8.15 × 10¹

2.63 × 10²

7.97 × 10²

3.08 × 10²

6.84 × 10⁴

4.69 × 10²

2.17 × 10³

3.85 × 10³

8.18 × 10³

6.04 × 10³

2.13 × 10⁴

7.31 × 10²

2.62 × 10²

9.34 × 10²

1.76 × 10³

1.76 × 10³

2-Nitroaniline

181

833

1072/1179/1192

1287

1304

1373

1385

1603/1615/1663

OSR*

817

1068/1160/1176

1247

1287

1355

1390

5 1571/1630/1608

263

836

1070/1186/1195

1270

1309

1359

1397

1600/1624/1662

OSR*

817

1048/1179/1195

1255

1285

1349

1368

1521/1608/1571

NA*

2.86 × 10²

2.57 × 10²

1.03 × 10²

2.07 × 10²

3.19 × 10²

7.29 × 10²

1.40 × 10³

NA*

8.73 × 10²

2.94 × 10³

9.61 × 10²

1.83 × 10³

1.34 × 10³

3.08 × 10³

3.02 × 10³

NA*

1.82 × 10³

1.42 × 10³

9.46 × 10²

8.96 × 10²

6.40 × 10²

8.25 × 10²

1.68 × 10³

3-Nitroaniline

494

833

1010

1076/1126/1191

1293

1370

1621/1656/1670

496

827

1004

1080/1171/1230

1273

1359

1590/1616/1635

464

839

1009

1077/1128/1194

1299

1309

1615/1669/1652

483

808

996

1043/1162/1216

1270

1345

1612/1622/1646

NA*

5.23 × 10¹

1.02 × 10²

2.33 × 10²

6.15× 10¹

7.79 × 10¹

3.78× 10¹

3.42 × 10³

2.27 × 10³

3.64 × 10³

3.26 × 10³

1.36 × 10³

2.29 × 10³

6.90 × 10²

2.27 × 10³

7.83 × 10²

1.06 × 10³

7.41 × 10³

1.22 × 10²

3.95 × 10²

3.28 × 10²

4-Nitroaniline

390

875

1062/1148/1205

1325

1358

1373

1633/1641/1665

406

865

1049/1141/1181

1322

1283

1341

1554/1596/1635

243

878

1049/1154/1207

1347

1303

1379

1617/1643/1665

OSR*

859

1045/1148/1175

1316

1332

1379

1572/1596/1626

NA*

1.15 × 10¹

1.40 × 10¹

8.28

2.23 × 10¹

1.20 × 10¹

3.59 × 10¹

NA*

1.06 × 10²

1.81 × 10²

6.37 × 10¹

1.73 × 10²

2.22 × 10²

3.41 × 10²

NA*

9.74 × 10¹

1.32 × 10²

4.06 × 10¹

9.45 × 10¹

2.25 × 10²

1.08 × 10²

Nitrobenzene

868

1018

1042/1185/1196

1371

1583/1628/1652

859

1009

1030/1169/1182

1354

1533/1595/1620

877

1017

1042/1188/1199

1305

1552/1627/1643

860

1010

1023/1151/1177

1339

1547/1590/1616

1.95

4.74

1.43× 10¹

4.41

3.57

9.41

2.81 × 10¹

4.59 × 10¹

2.94

1.31 × 10¹

1.49 × 10¹

5.85

1.84 × 10²

7.57

4.55 × 10¹