Biosynthesis of nanoparticles and their application in pharmaceutical industry

Metabolic Engineering for Bioactive Compounds: Strategies and Processes

Volumn , Issue , 2017, Pages 331-349

  Malik, Bisma ^a   Pirzadah, Tanveer Bilal ^a   Kumar, Manoj ^b   Rehman, Reiaz Ul ^a  

^a UNIVERSITY OF KASHMIR   (India)

^b AMITY UNIVERSITY   (India)

Author keywords

Biomedicines; Nanoparticles; Nanotechnology

Indexed keywords

EID: 85043445153     PISSN: None     EISSN: None     Source Type: Book    
DOI: 10.1007/978-981-10-5511-9_16     Document Type: Chapter

References (105)

1. Abdul R, Amri I, Desi J, Stella M, Hanggara S (2009) Synthesis of copper oxidenanoparticles by using Phormidium cyanobacterium. Int J Chem 9:355-360.
2. Ahmed S, Ahmad M, Swami BL, Ikram S (2016) A review on plants extract mediated synthesis of silver nanoparticles for antimicrobial applications: A green expertise. J Adv Res 7:17-28. doi:10.1016/j.jare.2015.02.007.
3. Akhtar MJ, Kumar S, Alhadlaq HA, Alrokayan SA, Abu-Salah KM, Ahamed M (2016) Dose-dependent genotoxicity of copper oxide nanoparticles stimulated by reactive oxygen species in human lung epithelial cells. Toxicol Ind Health 32:809-821. doi:10.1177/0748233713511512.
4. Akl M, Awwad M, Nida S (2012) Green synthesis of silver nanoparticles by mulberry Leaves extract. J Nanosci Nanotechnol 2:125-128. doi:10.5923/j.nn.20120204.06.
5. Alanazi FK, Radwan AA, Alsarra IA (2010) Biopharmaceutical applications of nanogold. Saudi Pharm J 18:179-193. doi:10.1016/j.jsps.2010.07.002.
6. Amrut SL, Satish JS, Ramchandara BP, Raghumani SN (2010) Synthesis and opticalcharacterization of copper oxide nanoparticles. Adv Appl Sci Res 1:36-40.
7. Ankamwar B, Damle C, Ahmad A, Sastry M (2005) Biosynthesis of gold and silver nanoparticles using Emblica Officinalis Fruit extract and their Phase Transfer and Transmetallation in an Organic Solution. J Nanosci Nanotechnol 5:1665-1671. doi:10.1166/jnn.2005.184.
8. Bhattacharya R, Mukherjee P (2008) Biological properties of naked metal nanoparticles. Adv Drug Deliv Rev 60:1289-1306. doi:10.1016/j.addr.2008.03.013.
9. Botha TL, Tanyn EJ, Wepener V (2015) Comparative aquatic toxicity of gold nanoparticles and ionic gold using a species sensitivity distribution approach. J Nanomater 501:986902. doi:10.1155/2015/986902.
10. Brust M, Walker M, Bethell D, Schiffrin DJ, Whyman R (1994) Synthesis of thiol-derivatized gold nanoparticles in a two-phase liquid-liquid system. J Chem Soc Chem Commun 7:801-802. doi:10.1039/C39940000801.
11. Busbee BD, Obare SO, Murphy CJ (2003) An improved synthesis of high aspect- ratio gold nanorods. Adv Mater 15:414-416. doi:10.1002/adma.200390095.
12. Cai W, Chen X (2007) Nanoplatforms for targeted molecular imaging in living subjects. Small 3:1840-1854. doi:10.1002/smll.20070035.
13. Cai W, Hsu AR, Li ZB, Chen X (2007) Are quantum dots ready for in vivo imaging in human subjects? Nanoscale Res Lett 2:265-281. doi:10.1007/s11671-007-9061-9.
14. Cai W, Shin DW, Chen K, Gheysens O, Cao Q, Wang SX, Gambhir SS, Chen X (2006) Peptide-labeled near-infrared quantum dots for imaging tumor vasculature in living subjects. Nano Lett 6:669-676. doi:10.1021/nl052405t.
15. Canizal G, Ascencio JA, Gardea-Torresday J, Yacamán MJ (2001) Multiple twinned gold nanorods grown by bio-reduction techniques. J Nanopart Res 3:475-481. doi:10.1023/A:1012578821566.
16. Chen YB, Bagnall DM, Koh HJ, Park KT, Hiraga K, Zhu Z, Yao T (1998) Plasma assisted molecular beam epitaxy of ZnO on c-plane sapphire: Growth and characterization. J Appl Phys 34:3912-3918. doi:10.1063/1.368595.
17. Contescu CI, Putyera K (2009) Dekker encyclopedia of nanoscience and nanotechnology, vol I-VI. ISBN 13:978-0-8493-9639-7. Taylor & Francis, New York.
18. Dhrutika P, Miral P, Krishnamurthy R (2013) Silver nanoparticles biosynthesis and its antimicrobial activity. CIBtech J Bio-protocol 2:50-57.
19. Di Guglielmo C, Lopez DR, De Lapuente J, Mallafre JM, Suarez MB (2010) Embryotoxicity of cobalt ferrite and gold nanoparticles: a first in vitro approach. Reprod Toxicol 30:271-276. doi:10.1016/j.reprotox.2010.05.001.
20. Diva B, Lingappa K, Dayanand A (2012) Antibacterial activity of nano gold particles synthesized by Bacillus sps. J Ecobiotechnol 4(1):43-45.
21. Duran N, Marcato PD (2012) Biotechnological routes to metallic nanoparticles production: Mechanistics aspects, antimicrobial activity, toxicity and industrial applications. In: Rai M, Cioffi N (eds) Nano-antimicrobials: progress and prospects, vol 3. Springer, Berlin, pp 337-374.
22. Duran N, Marcato PD, De Souza GIH, Alves OL, Esposito E (2007) Antibacterial effect of silver nanoparticles produced by fungal process on textile fabrics and their effluent treatment. J Biomed Nanotechnol 3:203-208. doi.org/10.1166/jbn.2007.022.
23. Duran N, Marcato PD, Duran M, Yadav A, Gade A, Rai M (2011) Mechanistic aspects in the biogenic synthesis of extracellular metal nanoparticles by peptides, bacteria, fungi and plants. Appl Microbiol Biotechnol 90:1609-1624. doi:10.1007/s00253-011-3249-8.
24. Eatemadi A, Daraee H, Zarghami N, Melat Yar H, Akbarzadeh A (2016) Nanofiber: synthesis and biomedical applications. Artif Cells Nanomed Biotechnol 44:111-121. doi:10.3109/21691401.2014.
25. Elumalai EK, Prasad T, Hemachandran J, Vivivan Therasa S, Thirumalai T, David E (2010) Extracellular synthesis of silver nanoparticles using leaves of Euphorbia hirta and their antibacterial activities. J Pharm Sci 2:549-554.
26. Esumi K, Suzuki A, Aihara N, Usui K, Torigoe K (1998) Preparation of gold colloids with UV irradiation using dendrimers as stabilizer. Langmuir 14:3157-3159. doi:10.1021/ la980162x.
27. Ferrari M (2005) Cancer nanotechnology: opportunities and challenges. Nat Rev Cancer 5:161- 171. doi:10.1038/nrc1566.
28. Frens G (1973) Controlled nucleation for the regulation of the particle size in monodisperse gold suspensions. Nature 241:20-22.
29. Fu L, Liu Z, Liu Y, Han B, Hu P, Cao L, Zhu D (2005) Beaded Cobalt oxide nanoparticles along carbon nanotubes: towards more highly integrated electronic devices. Adv Mater 17:217-221. doi:10.1002/adma.200400833.
30. Garcia ME, Baker LA, Crooks RM (1999) Preparation and characterization of dendrimer-gold colloid nanocomposites. Anal Chem 71:256-258. doi:10.1021/ac980588g.
31. Geethalakshmi R, Sarada DLV (2010) Synthesis of plant-mediated silver nanoparticles using Trianthema decandra extract and evaluation of their antimicrobial activities. Int J Eng Sci Technol 2:970-975.
32. Giersig M, Mulvaney P (1993) Preparation of ordered colloid monolayers by electrophoretic deposition. Langmuir 9:3408-3413. doi:10.1021/la00036a014.
33. Gokulakrishnan R, Ravikumar S, Raj JA (2012) In vitro antibacterial potential of metal oxide nanoparticles against antibiotic resistant bacteria pathogens. Asian Pacific J Tropical Dis 2:411-413. doi:10.1016/S2222-1808(12)60089-9.
34. González-Sánchez MI, Perni S, Tommasi G, Morris NG, Hawkins K, López-Cabarcos E, Prokopovich P (2015) Silver nanoparticle based antibacterial methacrylate hydrogels potential for bone graft applications. Mater Sci Eng A 50:332-340.
35. Govindarajan M, Rajeswary M, Veerakumar K, Muthukumaran U, Hoti SL, Mehlhorn H, Barnard DR, Benelli G (2016) Novel synthesis of silver nanoparticles using Bauhinia variegata: a recent eco-friendly approach for mosquito control. Parasitol Res 115:723-733.
36. Grodzinski P, Silver M, Molnar LK (2006) Nanotechnology for cancer diagnostics: promises and challenges. Expert Rev Mol Diagn 6:307-318. doi:10.1586/14737159.6.3.307.
37. Gurrappa I, Binder L (2008) Electrodeposition of nanostructured coatings and their characterization- a review. Sci Technol Adv Mater 9(4):043001.
38. Harekrishna B, Dipak KB, Gobinda SP, Priyanka S, Sankar PD (2009) Green synthesis of silver nanoparticles using latex of Jatropha curcas. Colloids Surf A Physicochem Eng Asp A39:134- 139. doi:10.1016/j.colsurfa.2009.02.008.
39. Haritha M, MeenaV SCC, Srinivasa RB (2011) Synthesis and characterization of Zinc oxide nanoparticles and its antimicrobial activity against Bacillus subtilis and Escherichia coli. Rasavan J Chem 4:217-222.
40. Hasna ASRP, Kamaraj M, Jagadeeswaran P, Sangeetha G, Rajeshwari S (2012) Plants: Green route for nanoparticles Synthesis. Int Res J Biol Sci 1:85-90.
41. Haverkamp RG, Marshall AT, Agterveld DV (2007) Pick your carats: Nanoparticles of gold- silver - copper alloy produced In-vivo. J Nanopart Res 9:697-700. doi:10.1007/s11051-006-9198-y.
42. Hemanth NKS, Kumar G, Karthik L, Bhaskara RKV (2010) Extracellular biosynthesis of silver nanoparticles using the filamentous fungus Penicillium sp. Arch Appl Sci Res 2:161-167.
43. Hiramatsu H, Osterloh FE (2004) A simple large-scale synthesis of nearly monodisperse gold and silver nanoparticles with adjustable sizes and with exchangeable surfactants. Chem Mater 16:2509-2511. doi:10.1021/cm049532v.
44. Huang X, Jain PK, El-Sayed IH, El-Sayed MA (2007) Gold nanoparticles: interesting optical properties and recent applications in cancer diagnostics and therapy. Nanomedicine (Lond) 2:681-693. doi:10.2217/17435889.2.5.681.
45. Hussain S, Ferguson C (2006) Best evidence topic report. Silver sulfadiazine cream in burns. Emerg Med J 23:929-932. doi:10.1136/emj.2006.043059.
46. Jain P, Aggarwal V (2012) Synthesis, characterization and antimicrobial effects of silver nanoparticles from microorganism. Int J Nano Mater Sci 1:108-120.
47. Jana NR, Gearheart L, Murphy CJ (2001a) Seed-mediated growth approach for shape-controlled synthesis of spheroidal and rod-like gold nanoparticles using a surfactant template. Adv Mater 13:1389-1393. doi:10.1002/1521-4095(200109)13:18>1389.
48. Jana NR, Gearheart L, Murphy CJ (2001b) Wet chemical synthesis of high aspect ratio cylindrical gold nanorods. J Phys Chem B 105:4065-4067. doi:10.1021/jp0107964.
49. Jana NR, Gearheart L, Obare SO, Murphy CJ (2002) Anisotropic chemical reactivity of gold spheroids and nanorods. Langmuir 18:922-927. doi:10.1021/la0114530.
50. Jing L, Liang X, Deng Z, Feng S, Li X, Huang M, Li C, Dai Z (2014) Prussian blue coated gold nanoparticles for simultaneous photoacoustic/CT bimodal imaging and photothermal ablation of cancer. Biomaterials 35(22):5814-5821.
51. Kapilashrami M, Zhang Y, Liu YS, Hagfeldt A, Guo J (2014) Probing the optical property and electronic structure of TiO2 nanomaterials for renewable energy applications. Chem Rev 114:9662-6707.
52. Kaviya S, Santhanalakshmi J, Viswanathan B (2011) Green synthesis of silver nanoparticles using Polyalthia longifolia leaf extract along with D-Sorbitol. J Nanotechnol 1-5 Khlebtsov NG, Dykman LA (2010) Optical properties and biomedical applications of plasmonic nanoparticles. J Quantitat Spectroscop Radiat Transf 111:1-35. doi:10.1016/j.jqsrt.2009.07.012.
53. Kim YG, Oh SK, Crooks RM (2004) Preparation and characterization of 1-2 nm dendrimer-encapsulated gold nanoparticles having very narrow size distributions. Chem Mater 16:167- 172. doi:10.1021/cm034932o.
54. Kim F, Song JH, Yang P (2002) Photochemical synthesis of gold nanorods. J Am Chem Soc 124:14316-14317. doi:10.1021/ja028110o.
55. Klasen HJ (2000) Historical review of the use of silver in the treatment of burns II. Renewed interest for silver. Burns 26:131-138. doi:10.1016/S0305-4179(99)00116-3.
56. Lamb AE, Anderson CWN, Haverkamp RG (2001) The extraction of gold from plants and its application to phytomining. Chem N Z 65:31-33.
57. Leaper DJ (2006) Silver dressing: the role in wound management. Int Wound J 3:282-294. doi:10.1111/j.1742-481X.2006.00265.
58. Leff DV, Brandt L, Heath JR (1996) Synthesis and characterization of hydrophobic, organically soluble gold nanocrystals functionalized with primary amines. Langmuir 12:4723-4730. doi:10.1021/la960445u.
59. Lekshmi NCJP, Sumi SB, Viveka S, Jeeva S, Brindha JR (2012) Antibacterial activity of nanoparticles from Allium sp. J Microbiol and Biotechnol Res 2:115-119.
60. Liu Z, Cai W, He L, Nakayama N, Chen K, Sun X, Chen X, Dai H (2007) In vivo biodistribution and highly efficient tumour targeting of carbon nanotubes in mice. Nat Nanotechnol 2:47-52. doi:10.1038/nnano.2006.170.
61. Lloyd JR, Byrne JM, Coker VS (2011) Biotechnological synthesis of functional nanomaterials. Curr Opin Biotechnol 22:509-515. doi:10.1016/j.copbio.2011.06.008.
62. Manna A, Imae T, Aoi K, Okada M, Yogo T (2001) Synthesis of dendrimer-passivated noble metal nanoparticles in a polar medium: comparison of size between silver and gold particles. Chem Mater 13:1674-1681. doi:10.1021/cm000416b.
63. Martin CR (1994) Nanomaterials: a membrane-based synthetic approach. Science 266:1961-1996. doi:10.1126/science.266.5193.1961.
64. Mieszawska AJ, Zamborini FP (2005) Gold nanorods grown directly on surfaces from microscale patterns of gold seeds. Chem Mater 17:3415-3420. doi:10.1021/cm050072v.
65. Mohanpuria P, Rana NK, Yadav SK (2008) Biosynthesis of nanoparticles: Technological concepts and future applications. J Nano Res 3:507-517. doi: 10.1007/s11051-007-9275-x.
66. Nanda A, Saravanan M (2009) Biosynthesis of silver nanoparticles from Staphylococcus aureus and its antimicrobial activity against MRSA and MRSE. Nanomed Nanotechnol Biol Med 5:452-456. doi:10.1016/j.nano.2009.01.012.
67. Narayanan KB, Sakthivel N (2010) Biological synthesis of metal nanoparticles by microbes. Adv Colloid Interface Sci 156:1-13. doi:10.1016/j.cis.2010.02.001.
68. Narayanan KB, Sakthivel N (2011) Green synthesis of biogenic metal nanoparticles by terrestrial and aquatic phototrophic and heterotrophic eukaryotes and biocompatible agents. Adv Colloid Interface Sci 169:59-79. doi:10.1016/j.cis.2011.08.004.
69. Nasrollahi A, Paurshamsian KH, Mansourkiaee P (2011) Antifungal activity of silver nanoparticles on some of fungi. Int J Nano Dim 1:233-239. doi:10.7508/ijnd.2010.03.007.
70. Nelson D, Priscyla DM, Oswaldo LA, Gabriel IHDS, Elisa E (2005) Mechanical aspects of biosynthesis of silver nanoparticles by several Fusarium oxysporum strains. J Nanobiotechnology 3:8. doi:10.1186/1477-3155-3-8.
71. Nithya R, Ragunathan R (2009) Synthesis of silver nanoparticles using Pleurotus Sajorcaju and its antimicrobial activity. Dig J Nanomater Biostruct 4:623-629.
72. Oza V, Pandey S, Shah V, Sharon M (2012) Extracellular fabrication of silver nanoparticles using Pseudomonas aeruginosa and its antimicrobial assay. Pelagia Res Lib. Adv Appl Sci Res 3:1778-1783.
73. Padmavathy N, Vijayaraghavan R (2016) Enhanced bioactivity of ZnO nanoparticles-an antimicrobial study. Sci Technol Adv Mater 9:035004. doi:10.1088/1468-6996/9/3/035004.
74. Park JW, Benz CC, Martin FJ (2004) Future directions of liposome and immunoliposome-based cancer therapeutics. Semin Oncol 31:196-205. doi:10.1053/j.seminoncol.2004.08.009.
75. Parthasarathi M et al (2009) Synthesis and characterization of titanium dioxide nanoparticles and their applications to textiles for microbe resistance. J Textile Apparel Technol Manage 6:1-8.
76. Parveen A, Ashish SR, Srinath R (2012) Biosynthesis and characterization of silver nanoparticles from Cassia auriculata leaf extract and in-vitro evaluation of antimicrobial activity. Int J Appl Biol Pharma Technol 3:222-228.
77. Prashanth S, Menaka I, Muthezhilan R, Navin KS (2011) Synthesis of plant mediated silver nanoparticles using medical plant extract and evaluation of its antimicrobial activities. Int J Eng Sci Technol 3:6235-6250. doi.org/10.1155/2011/573429.
78. Prasson PS, Chittaranjan B (2012) Green synthesis of gold nanoparticles and silver nanoparticles from leaves and bark of Ficus carica for nanotechnology application. IJSRP 2:1-4.
79. Ravindra BM, Seema LN, Neelambika TM, Gangadhar SM, Nataraja K, Vijaya KS (2012) Silver nanoparticles synthesized by in-vitro derived plants and Callus culture of Clitoria ternatea; evaluation of antimicrobial activity. Res Biotechnol 3:26-38.
80. Reetz MT, Helbig W (1994) Size-selective synthesis of nanostructured transition metal clusters. J Am Chem Soc 116:7401-7402. doi:10.1021/ja00095a051.
81. Rodriguez-Carmona E, Villaverde A (2010) Nanostructured bacterial materials for innovative medicines. Trends Microbiol 18:423-430. doi:10.1016/j.tim.2010.06.007.
82. Saha S, Chattopadhyay D, Acharya K (2011) Preparation of silver nanoparticles by bioproduction using Nigrospora oryzae culture filtrate and its antimicrobial activity. Digest J Nano Mater Biostruct 6:1519-1528.
83. Sahayaraj K, Rajesh S (2011) Bionanoparticles: synthesis and antimicrobial applications, science against microbial pathogens: communicating current research and technological advances. In: Méndez-Vilas A (ed). FORMATEX, pp 228-44.
84. Salam HA, Rajiv P, Kamaraj M, Jagadeeswaran P, Gunalan S, Sivaraj R (2012) Plant: Green route for nanoparticles synthesis. Inter. Res J Biol Sci 1:85-90.
85. Scott RWJ, Wilson OM, Crooks RM (2005) Synthesis, characterization and applications of dendrimer-encapsulated nanoparticles. J Phys Chem B 109:692-704. doi:10.1021/jp0469665.
86. Shahverdi M, Kesharwani J, Ingle A (2009) Fungus-mediated synthesis of silver nanoparticles and their activity against pathogenic fungi in combination with fluconazole. Nanomed Nanotechnol Biol 5:382-386. doi:10.1016/j.nano.2009.06.005.
87. Shi X, Ganser TR, Sun K, Balogh LP, Baker JR (2006) Characterization of crystalline dendrimer-stabilized gold nanoparticles. Nanotechnology 17:1072-1078. doi:10.1088/0957-4484/17/4/038.
88. Shi X, Lee I, Baker JR (2008) Acetylation of dendrimer-entrapped gold and silver nanoparticles. J Mater Chem 18:586-593. doi:10.1039/B714133E.
89. Shiekh FA, Farooq O, Mian SH, Bautista RL, Arja SB, Andrabi KI (2016) The pitfalls of growing nanomaterials. Nanomedicine (Lond) 11:1635-1638. doi:10.2217/nnm-2016-0043.
90. Shloma M, Grouchko M, Kamyshny A (2010) Copper nanoparticles for printed electronics: Routes towards achieving oxidation stability. Materials 3:4626-4638. doi:10.3390/ma3094626.
91. Sibbald RG, Contreras-Ruiz J, Coutts P, Fierheller M, Rothman A, Woo K (2007) Bacteriology, inflammation, and healing: a study of nanocrystalline silver dressings in chronic venous leg ulcers. Adv Skin Wound Care 20:549-458. doi:10.1097/01.ASW.0000294757.05049.85.
92. Silpa S (2016) Nanotechnology-present revolutionary biotechnology. Int J Pharma Res Health Sci 4:1261-1267.
93. Soheyla H, Hamed B, Eshrat GF, Farzaneh N (2012) Green synthesis of copper oxide nanoparticles using Penicillium aurantiogriseum, Penicillium citrinum and Penicillium waksmami. Dig J Nanomater Biostruct 7:7999-1005.
94. Sondi I, Sondi B (2004) Silver nanoparticles as antimicrobial agent: A case study on E coli as a model for gram negative bacteria. J Colloid Interface Sci 275:175-182. doi:10.1016/j. jcis.2004.02.012.
95. Sridhara V, Ali B, Shaziya K, Satapathy LN, Khandelwal P (2012) Biosynthesis and antibacterial activity of silver nanoparticles. Res. J Biotechnol 8:11-17. doi: 10.1016/j.nano.2011.05.007.
96. Sundrarajan M, Gowri S (2011) Green synthesis of titanium dioxide nanoparticles nyctanthes arbortristis leave extracts. Chalcogenide Lett 8(8):447-451. doi:10.1016/S1995-7645(14)60171-1.
97. Thorek DL, Chen AK, Czupryna J, Andrew T (2006) Super-paramagnetic iron oxide nanoparticle probes for molecular imaging. Ann Biomed Eng 34:23-38. doi:10.1007/s10439-005-9002-7.
98. Tikariha S, Singh S, Banerjee S, Vidyarthi AS (2012) Biosynthesis of gold nanoparticles, Scope and application: A review. Int J Pharm Sci Res 3:1603-1615.
99. Turkevich J, Stevenson PC, Hillier J (1951) The study of the nucleation and growth processes in the synthesis of colloidal gold. Discuss Faraday Soc 11:55-75. doi:10.1039/DF9511100055.
100. van der Zande BMI, Boehmer MR, Fokkink LGJ, Schönenberger C (1997) Aqueous gold sols and rod-shaped particles. J Phys Chem B 101:852-854. doi:10.1021/jp963348i.
101. Weare WW, Reed SM, Warner MG, Hutchison JE (2000) Improved synthesis of small (dCORE~1.5 nm) phosphine-stabilized gold nanoparticles. J Am Chem Soc 122:12890-13901. doi:10.1021/ja002673n.
102. Wong EH, Lam SJ, Nam E, Qiao GG (2014) Biocompatible single-chain polymeric nanoparticles via organo-catalyzed ring-opening polymerization. ACS Macro Lett 3:524-528.
103. Yogeswari R, Sikha B, Akshya KO, Nayak PC (2012) Green synthesis of silver nanoparticles using Ocimum sanctum (Tulashi) and study of their antibacterial and antifungal activities. J Microbiol Antimicrobial 4:103-109. doi:10.5897/JMA11.060.
104. Yohan D, Chithrani BD (2014) Applications of nanoparticles in nanomedicine. J Biomed Nanotechnol 10:2371-2392. doi:10.1166/jbn.2014.2015.
105. Yu YY, Chang SS, Lee CL, Chris Wang CR (1997) Gold nanorods: electrochemical synthesis and optical properties. J Phys Chem B 101:6661-6664. doi:10.1021/jp971656q.