701
|
Thermal instability of gold nanorods in micellar solution of water/glycerol mixtures. Colloids Surf A Physicochem Eng Asp 2004. [DOI: 10.1016/j.colsurfa.2004.06.038] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
|
702
|
Pei L, Mori K, Adachi M. Formation process of two-dimensional networked gold nanowires by citrate reduction of AuCl4- and the shape stabilization. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:7837-43. [PMID: 15323538 DOI: 10.1021/la049262v] [Citation(s) in RCA: 138] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Gold nanowires with a two-dimensional (2-D) network structure were formed by citrate reduction of AuCl4- with a low concentration of citrate. The structure change during the growth processes was observed by transmission electron microscopy (TEM) and the variation in concentrations of gold species in the aqueous solution was monitored by UV-vis spectra and Inductively Coupled Argon Plasma Emission Spectrophotometer (ICAP). The formation of 2-D gold nanowires was induced by the small amount of reducing agent because the preliminary gold nanoparticles formed by reduction of AuCl4- were thermodynamically unstable in the aqueous solution due to the insufficient capping of citrate. One of the key points of nanowire formation is the preferential adsorption of AuCl4- instead of citrate ions on the surface of the preliminary gold particles, which results in an attracting force between gold nanoparticles. We propose a hit-to-stick-to-fusion model, in which gold nanoparticles adhere by the attraction force and stick together, causing selective deposition of reduced gold metallic species on the concave surface of the two sticking particles, followed by fusion into nanowires. Nanowires then connect with each other, forming a network structure. The evidence obtained from TEM observation of transformation from gold nanowires on a TEM grid to large nanoparticles by hydrogen gas reduction and time-resolved measurements of gold ions suggest that gold ions not only are crucial for the growth of gold nanowires but also play an important role in stabilizing the shape of gold nanowires during the formation process. This method for synthesizing 2-D gold nanowires is simple and relatively easy application to the synthesis of other metallic nanowires such as silver or platinum is expected.
Collapse
Affiliation(s)
- Lihua Pei
- Institute of Advanced Energy, Kyoto University, Uji, Kyoto 611 0011, Japan
| | | | | |
Collapse
|
703
|
Kuo CH, Chiang TF, Chen LJ, Huang MH. Synthesis of highly faceted pentagonal- and hexagonal-shaped gold nanoparticles with controlled sizes by sodium dodecyl sulfate. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:7820-7824. [PMID: 15323536 DOI: 10.1021/la049172q] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We report the synthesis of pentagonal- and hexagonal-shaped gold nanoparticles with controlled diameters ranging from 5 to 50 nm. These nanoparticles were prepared by a seeding growth approach. Sodium dodecyl sulfate (SDS) molecules served as the capping agent to restrict the particle size. In addition, the formation of highly faceted gold nanoparticles may be facilitated by the possibly ineffective capping interactions between the lamellar micellar structures formed by the SDS molecules and the gold nanoparticles. The crystal structure of the highly faceted particles was found to consist of mostly [111] surfaces as particle size increases, as revealed by both TEM and XRD results.
Collapse
Affiliation(s)
- Chun-Hong Kuo
- Department of Chemistry, National Tsing Hua University, Hsinchu 30013, Taiwan
| | | | | | | |
Collapse
|
704
|
Gole A, Orendorff CJ, Murphy CJ. Immobilization of gold nanorods onto acid-terminated self-assembled monolayers via electrostatic interactions. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:7117-7122. [PMID: 15301495 DOI: 10.1021/la049051q] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We report the immobilization of gold nanorods onto self-assembled monolayers (SAMs) of 16-mercaptohexadecanoic acid (16-MHA). The simple two step protocol involves formation of a SAM of 16-MHA molecules onto gold-coated glass slides and subsequent immersion of these slides into the gold nanorod solution. The nanorods, formed by a seed-mediated, surfactant-assisted synthesis protocol, are stabilized in solution due to surface modification by the surfactant cetyltrimethylammonium bromide (CTAB). Attractive electrostatic interactions between the carboxylic acid group on the SAM and the positively charged CTAB molecules are likely responsible for the nanorod immobilization. UV-vis spectroscopy has been used to follow the kinetics of the nanorod immobilization. The nature of interaction between the gold nanorods and the 16-MHA SAM has been probed by Fourier transform infrared spectroscopy (FTIR). The surface morphology of the immobilized rods is studied by scanning electron microscopy (SEM) and atomic force microscopy (AFM) measurements. SEM was also used to determine the density of the immobilized nanorods as a function of the pH of immobilization. Control over the surface coverage of the immobilized gold nanorods has been demonstrated by simple pH variation. Such well-dispersed immobilized gold nanorods with control over the surface coverage could be interesting substrates for applications such as surface-enhanced Raman spectroscopy (SERS).
Collapse
Affiliation(s)
- Anand Gole
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, USA
| | | | | |
Collapse
|
705
|
Liao F. Improved Rapid Preparation of Polyelectrolyte-protected Gold Nanoparticles through a Microwave-based Thermal Process. CHEM LETT 2004. [DOI: 10.1246/cl.2004.1020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
706
|
Sau TK, Murphy CJ. Seeded high yield synthesis of short Au nanorods in aqueous solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2004; 20:6414-20. [PMID: 15248731 DOI: 10.1021/la049463z] [Citation(s) in RCA: 816] [Impact Index Per Article: 40.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Short gold nanorods of average lengths ranging between 20 and 100 nm (with corresponding aspect ratios of 2 and 4) were synthesized in excellent yield (approximately 97%). These nanorods were characterized by dark-field microscopy, UV-visible spectrophotometry, and transmission electron microscopy. Temporal evolution of rod shape had also been followed by UV-visible spectrophotometry and transmission electron microscopy and indicates that the nanorods briefly increase in length, then increase slightly in width, as they grow. The effect of the synthetic parameters on the rod dimension and yield was explored to find out suitable conditions to produce short nanorods; short nanorods have both plasmon bands in the visible region of the spectrum, which is a valuable property for sensor applications.
Collapse
Affiliation(s)
- Tapan K Sau
- Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter Street, Columbia, South Carolina 29208, USA
| | | |
Collapse
|
707
|
Adding sodium dodecylsulfate to the running electrolyte enhances the separation of gold nanoparticles by capillary electrophoresis. Anal Chim Acta 2004. [DOI: 10.1016/j.aca.2003.12.064] [Citation(s) in RCA: 87] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
708
|
Liu, Guyot-Sionnest P. Synthesis and Optical Characterization of Au/Ag Core/Shell Nanorods. J Phys Chem B 2004. [DOI: 10.1021/jp037644o] [Citation(s) in RCA: 378] [Impact Index Per Article: 18.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Liu
- James Frank Institute, The University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637
| | - Philippe Guyot-Sionnest
- James Frank Institute, The University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637
| |
Collapse
|
709
|
Chen S, Carroll DL. Silver Nanoplates: Size Control in Two Dimensions and Formation Mechanisms. J Phys Chem B 2004. [DOI: 10.1021/jp031077n] [Citation(s) in RCA: 218] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Sihai Chen
- School of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634-0971, and Center for Nanotechnology, Department of Physics, Wake Forest University, Winston-Salem, North Carolina 27109-7507
| | - David L. Carroll
- School of Materials Science and Engineering, Clemson University, Clemson, South Carolina 29634-0971, and Center for Nanotechnology, Department of Physics, Wake Forest University, Winston-Salem, North Carolina 27109-7507
| |
Collapse
|
710
|
Wu SH, Chen DH. Synthesis and Stabilization of Ni Nanoparticles in a Pure Aqueous CTAB Solution. CHEM LETT 2004. [DOI: 10.1246/cl.2004.406] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
711
|
Niidome Y, Takahashi H, Urakawa S, Nishioka K, Yamada S. Immobilization of Gold Nanorods on the Glass Substrate by the Electrostatic Interactions for Localized Plasmon Sensing. CHEM LETT 2004. [DOI: 10.1246/cl.2004.454] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
712
|
Zhang P, Gao L. Synthesis and controlling the morphology of CdS nanocrystals via hydrothermal microemulsions. J Colloid Interface Sci 2004; 272:99-103. [PMID: 14985027 DOI: 10.1016/j.jcis.2003.11.050] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2003] [Accepted: 11/24/2003] [Indexed: 11/22/2022]
Abstract
Wurtzite CdS nanocrystals were synthesized via a hydrothermal microemulsion method. With the preaddition of increasing amounts of dodecanethiol, the resulting crystals changed from nanorods to pyramidal particles with decreasing sizes. The control effect of dodecanethiol was attributed to the competition process during the crystal growth and the relevant change in the film flexibility of inverse micelles. The effects of water content, ion concentration, and hydrothermal temperature on the crystal morphologies and size distributions were also investigated.
Collapse
Affiliation(s)
- Peng Zhang
- State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Ding-Xi Road, Shanghai 200050, People's Republic of China
| | | |
Collapse
|
713
|
Pei L, Mori K, Adachi M. Direct Chemical Synthesis of Gold Nanowires with 2-D Network Structure and Relationship between the Presence of Gold Ions and Shape Stability of Gold Nanowires. CHEM LETT 2004. [DOI: 10.1246/cl.2004.324] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
714
|
Sun X, Dong S, Wang E. One-step synthesis and characterization of polyelectrolyte-protected gold nanoparticles through a thermal process. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.01.010] [Citation(s) in RCA: 110] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
715
|
Hao E, Li S, Bailey RC, Zou S, Schatz GC, Hupp JT. Optical Properties of Metal Nanoshells. J Phys Chem B 2004. [DOI: 10.1021/jp036301n] [Citation(s) in RCA: 250] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Encai Hao
- Department of Chemistry and Institute for Nanotechnology and Department of Materials Science and Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - Shuyou Li
- Department of Chemistry and Institute for Nanotechnology and Department of Materials Science and Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - Ryan C. Bailey
- Department of Chemistry and Institute for Nanotechnology and Department of Materials Science and Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - Shengli Zou
- Department of Chemistry and Institute for Nanotechnology and Department of Materials Science and Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - George C. Schatz
- Department of Chemistry and Institute for Nanotechnology and Department of Materials Science and Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| | - Joseph T. Hupp
- Department of Chemistry and Institute for Nanotechnology and Department of Materials Science and Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208
| |
Collapse
|
716
|
Adachi M, Mori K, Sato Y, Pei L. Gold Nanowire Formation of 2-Dimensional Network Structure with Electric Conductivity. JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 2004. [DOI: 10.1252/jcej.37.604] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Koichi Mori
- Institute of Advanced Energy, Kyoto University
| | - Yasuo Sato
- Institute of Advanced Energy, Kyoto University
| | - Lihua Pei
- Institute of Advanced Energy, Kyoto University
| |
Collapse
|
717
|
Hao E, Schatz GC. Electromagnetic fields around silver nanoparticles and dimers. J Chem Phys 2004; 120:357-66. [PMID: 15267296 DOI: 10.1063/1.1629280] [Citation(s) in RCA: 805] [Impact Index Per Article: 40.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We use the discrete dipole approximation to investigate the electromagnetic fields induced by optical excitation of localized surface plasmon resonances of silver nanoparticles, including monomers and dimers, with emphasis on what size, shape, and arrangement leads to the largest local electric field (E-field) enhancement near the particle surfaces. The results are used to determine what conditions are most favorable for producing enhancements large enough to observe single molecule surface enhanced Raman spectroscopy. Most of the calculations refer to triangular prisms, which exhibit distinct dipole and quadrupole resonances that can easily be controlled by varying particle size. In addition, for the dimer calculations we study the influence of dimer separation and orientation, especially for dimers that are separated by a few nanometers. We find that the largest /E/2 values for dimers are about a factor of 10 larger than those for all the monomers examined. For all particles and particle orientations, the plasmon resonances which lead to the largest E-fields are those with the longest wavelength dipolar excitation. The spacing of the particles in the dimer plays a crucial role, and we find that the spacing needed to achieve a given /E/2 is proportional to nanoparticle size for particles below 100 nm in size. Particle shape and curvature are of lesser importance, with a head to tail configuration of two triangles giving enhanced fields comparable to head to head, or rounded head to tail. The largest /E/2 values we have calculated for spacings of 2 nm or more is approximately 10(5).
Collapse
Affiliation(s)
- Encai Hao
- Department of Chemistry and Institute for Nanotechnology, Northwestern University, Evanston, Illinois 60208-3113, USA
| | | |
Collapse
|
718
|
Swami A, Kasture M, Pasricha R, Sastry M. Flat gold nanostructures by the reduction of chloroaurate ions constrained to a monolayer at the air–water interface. ACTA ACUST UNITED AC 2004. [DOI: 10.1039/b311771p] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
719
|
Hao E, Schatz GC. Electromagnetic fields around silver nanoparticles and dimers. J Chem Phys 2004. [DOI: 10.1063/1.1629280 https:/doi.org/10.1063/1.1629280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023] Open
|
720
|
|
721
|
Molecular insights for how preferred oxoanions bind to and stabilize transition-metal nanoclusters: a tridentate, C3 symmetry, lattice size-matching binding model. Coord Chem Rev 2004. [DOI: 10.1016/j.cct.2003.08.003] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
722
|
|
723
|
Zhong Z, Male KB, Luong JHT. More Recent Progress in the Preparation of Au Nanostructures, Properties, and Applications. ANAL LETT 2003. [DOI: 10.1081/al-120026563] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
724
|
Pillai ZS, Kamat PV. What Factors Control the Size and Shape of Silver Nanoparticles in the Citrate Ion Reduction Method? J Phys Chem B 2003. [DOI: 10.1021/jp037018r] [Citation(s) in RCA: 601] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zeena S. Pillai
- Notre Dame Radiation Laboratory, Notre Dame, Indiana 46556-0579
| | | |
Collapse
|
725
|
Zhu YJ, Hu XL. Microwave-polyol Preparation of Single-crystalline Gold Nanorods and Nanowires. CHEM LETT 2003. [DOI: 10.1246/cl.2003.1140] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
726
|
Cozzoli PD, Kornowski A, Weller H. Low-Temperature Synthesis of Soluble and Processable Organic-Capped Anatase TiO2Nanorods. J Am Chem Soc 2003; 125:14539-48. [PMID: 14624603 DOI: 10.1021/ja036505h] [Citation(s) in RCA: 865] [Impact Index Per Article: 41.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We demonstrate the controlled growth of high aspect ratio anatase TiO2 nanorods by hydrolysis of titanium tetraisopropoxide (TTIP) in oleic acid (OLEA) as surfactant at a temperature as low as 80 degrees C. Chemical modification of TTIP by OLEA is proven to be a rational strategy to tune the reactivity of the precursor toward water. The most influential factors in shape control of the nanoparticles are investigated by simply manipulating their growth kinetics. The presence of tertiary amines or quaternary ammonium hydroxides as catalysts is essential to promote fast crystallization under mild conditions. The novelty of the present approach relies on the large-scale production of organic-capped TiO2 nanocrystals to which standard processing of colloidal nanocrystals, such as surface ligand exchange, can be applied for the first time. Concentrated colloidal titania dispersions can be prepared for a number of fundamental studies in homogeneous solutions and represent a new source of easily processable oxide material for many technological applications.
Collapse
Affiliation(s)
- P Davide Cozzoli
- Institute of Physical Chemistry, University of Hamburg, Bundesstrasse 45, D-20146 Hamburg, Germany
| | | | | |
Collapse
|
727
|
Kang SK, Chah S, Yun CY, Yi J. Aspect ratio controlled synthesis of gold nanorods. KOREAN J CHEM ENG 2003. [DOI: 10.1007/bf02706952] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
728
|
Mafuné F, Kohno JY, Takeda Y, Kondow T. Formation of Gold Nanonetworks and Small Gold Nanoparticles by Irradiation of Intense Pulsed Laser onto Gold Nanoparticles. J Phys Chem B 2003. [DOI: 10.1021/jp030173l] [Citation(s) in RCA: 135] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fumitaka Mafuné
- Cluster Research Laboratory, Toyota Technological Institute, and East Tokyo Laboratory, Genesis Research Institute, Inc., 717-86 Futamata, Ichikawa, Chiba 272-0001, Japan
| | - Jun-ya Kohno
- Cluster Research Laboratory, Toyota Technological Institute, and East Tokyo Laboratory, Genesis Research Institute, Inc., 717-86 Futamata, Ichikawa, Chiba 272-0001, Japan
| | - Yoshihiro Takeda
- Cluster Research Laboratory, Toyota Technological Institute, and East Tokyo Laboratory, Genesis Research Institute, Inc., 717-86 Futamata, Ichikawa, Chiba 272-0001, Japan
| | - Tamotsu Kondow
- Cluster Research Laboratory, Toyota Technological Institute, and East Tokyo Laboratory, Genesis Research Institute, Inc., 717-86 Futamata, Ichikawa, Chiba 272-0001, Japan
| |
Collapse
|
729
|
Affiliation(s)
- Nurit Taub
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Olga Krichevski
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Gil Markovich
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| |
Collapse
|
730
|
Coronado EA, Schatz GC. Surface plasmon broadening for arbitrary shape nanoparticles: A geometrical probability approach. J Chem Phys 2003. [DOI: 10.1063/1.1587686] [Citation(s) in RCA: 344] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
731
|
Yin B, Ma H, Wang S, Chen S. Electrochemical Synthesis of Silver Nanoparticles under Protection of Poly(N-vinylpyrrolidone). J Phys Chem B 2003. [DOI: 10.1021/jp0349031] [Citation(s) in RCA: 417] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
732
|
Kawasaki M, Hori M. Laser-Induced Conversion of Noble Metal-Island Films to Dense Monolayers of Spherical Nanoparticles. J Phys Chem B 2003. [DOI: 10.1021/jp034768s] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mitsuo Kawasaki
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan
| | - Mitsuhiro Hori
- Department of Molecular Engineering, Graduate School of Engineering, Kyoto University, Yoshida, Kyoto 606-8501, Japan
| |
Collapse
|
733
|
Manna L, Milliron DJ, Meisel A, Scher EC, Alivisatos AP. Controlled growth of tetrapod-branched inorganic nanocrystals. NATURE MATERIALS 2003; 2:382-5. [PMID: 12764357 DOI: 10.1038/nmat902] [Citation(s) in RCA: 533] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2002] [Accepted: 04/08/2003] [Indexed: 05/20/2023]
Abstract
Nanoscale materials are currently being exploited as active components in a wide range of technological applications in various fields, such as composite materials, chemical sensing, biomedicine, optoelectronics and nanoelectronics. Colloidal nanocrystals are promising candidates in these fields, due to their ease of fabrication and processibility. Even more applications and new functional materials might emerge if nanocrystals could be synthesized in shapes of higher complexity than the ones produced by current methods (spheres, rods, discs). Here, we demonstrate that polytypism, or the existence of two or more crystal structures in different domains of the same crystal, coupled with the manipulation of surface energy at the nanoscale, can be exploited to produce branched inorganic nanostructures controllably. For the case of CdTe, we designed a high yield, reproducible synthesis of soluble, tetrapod-shaped nanocrystals through which we can independently control the width and length of the four arms.
Collapse
Affiliation(s)
- Liberato Manna
- Department of Chemistry, University of California, Berkeley and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | | | | | | | | |
Collapse
|
734
|
Some spectroscopic properties of gold nanorods according to a schematic quantum model founded on the dielectric behavior of the electron-gas confined in a box. I. Chem Phys 2003. [DOI: 10.1016/s0301-0104(03)00189-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
735
|
Separation of Nanoparticles in Different Sizes and Compositions by Capillary Electrophoresis. B KOREAN CHEM SOC 2003. [DOI: 10.5012/bkcs.2003.24.5.684] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
736
|
Affiliation(s)
- Chunxin Ji
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218
| | - Peter C. Searson
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218
| |
Collapse
|
737
|
West R, Wang Y, Goodson T. Nonlinear Absorption Properties in Novel Gold Nanostructured Topologies. J Phys Chem B 2003. [DOI: 10.1021/jp027762w] [Citation(s) in RCA: 91] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- R. West
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202
| | - Y. Wang
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202
| | - T. Goodson
- Department of Chemistry, Wayne State University, Detroit, Michigan 48202
| |
Collapse
|
738
|
Abstract
Noble metal particles have long fascinated scientists because of their intense color, which led to their application in stained glass windows as early as the Middle Ages. The recent resurrection of colloidal and cluster chemistry has brought about the strive for new materials that allow a bottoms-up approach of building improved and new devices with nanoparticles or artificial atoms. In this review, we discuss some of the properties of individual and some assembled metallic nanoparticles with a focus on their interaction with cw and pulsed laser light of different energies. The potential application of the plasmon resonance as sensors is discussed.
Collapse
Affiliation(s)
- Stephan Link
- Laser Dynamics Laboratory, School of Chemistry and Biochemistry, Atlanta, GA 30332-0400, USA
| | | |
Collapse
|
739
|
Pileni MP. The role of soft colloidal templates in controlling the size and shape of inorganic nanocrystals. NATURE MATERIALS 2003; 2:145-50. [PMID: 12612669 DOI: 10.1038/nmat817] [Citation(s) in RCA: 571] [Impact Index Per Article: 27.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
In the past decade, colloidal solutions have been assumed to be very efficient templates for controlling particle size and shape. A large number of groups have used reverse micelles to control the size of spherical nanoparticles. This makes it possible to determine the various parameters involved in such processes, and demonstrates that nanoparticles can be considered to be efficient nanoreactors. However, some discrepancies arise. There are few reports concerning the control of particle shape, and it is still rather difficult to determine the key parameters, such as the adsorption of salts and other molecules, and the synthesis procedure. Here, we discuss these controls of the size and shape of inorganic nanomaterials.
Collapse
Affiliation(s)
- Marie-Paule Pileni
- Laboratoire des Materiaux Mésoscopiques et Nanomètriques, LM2N, (UMR 7070), Université Pierre et Marie Curie, BP 52, 4 Place Jussieu, 75005 Paris, France.
| |
Collapse
|
740
|
Yu KMK, Steele AM, Zhu J, Fu Q, Tsang SC. Synthesis of well-dispersed nanoparticles within porous solid structures using surface-tethered surfactants in supercritical CO2. ACTA ACUST UNITED AC 2003. [DOI: 10.1039/b207064b] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
741
|
Niidome Y, Nishioka K, Kawasaki H, Yamada S. Rapid synthesis of gold nanorods by the combination of chemical reduction and photoirradiation processes; morphological changes depending on the growing processes. Chem Commun (Camb) 2003:2376-7. [PMID: 14518922 DOI: 10.1039/b307836a] [Citation(s) in RCA: 128] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Combination of chemical reduction of tetrachloroaurate by ascorbic acid and subsequent ultraviolet photoirradiation resulted in the quick generation of gold nanorods quantitatively, with appreciable shape changes as the reaction proceeds.
Collapse
Affiliation(s)
- Yasuro Niidome
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, Hakozaki, Fukuoka 812-8581, Japan.
| | | | | | | |
Collapse
|
742
|
Hao E, Kelly KL, Hupp JT, Schatz GC. Synthesis of silver nanodisks using polystyrene mesospheres as templates. J Am Chem Soc 2002; 124:15182-3. [PMID: 12487587 DOI: 10.1021/ja028336r] [Citation(s) in RCA: 199] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We report the synthesis of Ag nanodisk using polystyrene mesospheres as templates. TEM measurements show that the average disk thickness is 9.0 +/- 1.0 nm and the diameter is 36 +/- 8 nm. The particles exhibit an intense electronic spectrum that differs markedly from that for spheres (purple vs yellow solutions). We present electromagnetic theory calculations which exhibit a qualitative match with the observed spectrum, enabling us to assign several of the plasmon resonance features.
Collapse
Affiliation(s)
- Encai Hao
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA
| | | | | | | |
Collapse
|
743
|
Kelly KL, Coronado E, Zhao LL, Schatz GC. The Optical Properties of Metal Nanoparticles: The Influence of Size, Shape, and Dielectric Environment. J Phys Chem B 2002. [DOI: 10.1021/jp026731y] [Citation(s) in RCA: 7961] [Impact Index Per Article: 361.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. Lance Kelly
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - Eduardo Coronado
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - Lin Lin Zhao
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| | - George C. Schatz
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113
| |
Collapse
|
744
|
Abstract
Gold nanorods have been synthesized by photochemically reducing gold ions within a micellar solution. The aspect ratio of the rods can be controlled with the addition of silver ions. This process reported here is highly promising for producing uniform nanorods, and more importantly it will be useful in resolving the growth mechanism of anisotropic metal nanoparticles due to its simplicity and the relatively slow growth rate of the nanorods.
Collapse
Affiliation(s)
- Franklin Kim
- Department of Chemistry, Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720, USA
| | | | | |
Collapse
|
745
|
Nikoobakht B, Wang J, El-Sayed MA. Surface-enhanced Raman scattering of molecules adsorbed on gold nanorods: off-surface plasmon resonance condition. Chem Phys Lett 2002. [DOI: 10.1016/s0009-2614(02)01492-6] [Citation(s) in RCA: 363] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
746
|
Gluodenis M, Foss CA. The Effect of Mutual Orientation on the Spectra of Metal Nanoparticle Rod−Rod and Rod−Sphere Pairs. J Phys Chem B 2002. [DOI: 10.1021/jp014245p] [Citation(s) in RCA: 137] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Maryann Gluodenis
- Department of Chemistry, Georgetown University, 37th and “O” Streets NW, Washington, District of Columbia 20057
| | - Colby A. Foss
- Department of Chemistry, Georgetown University, 37th and “O” Streets NW, Washington, District of Columbia 20057
| |
Collapse
|
747
|
Kamat PV. Photophysical, Photochemical and Photocatalytic Aspects of Metal Nanoparticles. J Phys Chem B 2002. [DOI: 10.1021/jp0209289] [Citation(s) in RCA: 1670] [Impact Index Per Article: 75.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
748
|
Norman TJ, Grant CD, Magana D, Zhang JZ, Liu J, Cao D, Bridges F, Van Buuren A. Near Infrared Optical Absorption of Gold Nanoparticle Aggregates. J Phys Chem B 2002. [DOI: 10.1021/jp0204197] [Citation(s) in RCA: 221] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | | | | | | | - Jun Liu
- Sandia National Laboratories, Mail Stop 1413, P.O. Box 5800, Albuquerque, New Mexico 87185-1413
| | | | | | - Anthony Van Buuren
- Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550
| |
Collapse
|
749
|
Nikoobakht B, Burda C, Braun M, Hun M, El-Sayed MA. The quenching of CdSe quantum dots photoluminescence by gold nanoparticles in solution. Photochem Photobiol 2002; 75:591-7. [PMID: 12081320 DOI: 10.1562/0031-8655(2002)075<0591:tqocqd>2.0.co;2] [Citation(s) in RCA: 98] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The photoluminescence (PL) of CdSe quantum dots (QD) in aqueous media has been studied in the presence of gold nanoparticles (NP) with different shapes. The steady state PL intensity of CdSe QD (1.5-2 nm in size) is quenched in the presence of gold NP. Picosecond bleach recovery and nanosecond time-resolved luminescence measurements show a faster bleach recovery and decrease in the lifetime of the emitting states of CdSe QD in the presence of quenchers. Surfactant-capped gold nanorods (NR) with aspect ratio of 3 and surfactant-capped and citrate-capped nanospheres (NS) of 12 nm diameter were used as quenchers in order to study the effect of shape and surface charge on the quenching rates. The Stern-Volmer kinetics model is used to examine the observed quenching behavior as a function of the quencher concentration. It was found that the quenching rate of NR is more than 1000 times stronger than that of NS with the same capping material. We also found that the quenching rate decreases as the length of the NR decreases, although the overlap between the CdSe emission and the NR absorption increases. This suggests that the quenching is a result of electron transfer rather than long-range (Forster-type) energy transfer processes. The quenching was attributed to the transfer of electron with energies below the Fermi level of gold to the trap holes of CdSe QD. The observed large difference between NR and NS quenching efficiencies was attributed to the presence of the [110] facets only in the NR, which have higher surface energy.
Collapse
Affiliation(s)
- Babak Nikoobakht
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, USA
| | | | | | | | | |
Collapse
|
750
|
Shen Y, Liu J, Wu A, Jiang J, Bi L, Liu B, Li Z, Dong S. Preparation of Pt Nanoparticles Assembled in Multilayer Films. CHEM LETT 2002. [DOI: 10.1246/cl.2002.550] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|