Zobrazeno 1 - 10
of 23
pro vyhledávání: '"R Griffith, Freeman"'
Autor:
George C. Schatz, Samuel L. Kleinman, R. Griffith Freeman, Nicholas Valley, Michael J. Natan, Anne Isabelle Henry, Martin G. Blaber, Bhavya Sharma, Richard P. Van Duyne
Publikováno v:
Journal of the American Chemical Society. 135:301-308
Determining the existence of any direct spectral relationship between the far-field scattering properties and the near-field Raman-enhancing properties of surface-enhanced Raman spectroscopy (SERS) substrates has been a challenging task with only a f
Autor:
Kristin L. Wustholz, Jeffrey M. McMahon, Anne Isabelle Henry, Michael J. Natan, George C. Schatz, R. Griffith Freeman, Richard P. Van Duyne
Publikováno v:
Analytical and Bioanalytical Chemistry. 394:1819-1825
Finite element method calculations were carried out to determine extinction spectra and the electromagnetic (EM) contributions to surface-enhanced Raman spectroscopy (SERS) for 90-nm Au nanoparticle dimers modeled after experimental nanotags. The cal
Publikováno v:
Nanobiotechnology
A dual-mode molecular beacon on a multiplexed substrate has been developed and applied to the measurement of unlabeled human viral RNA. The detection system is based on a combined surface-enhanced Raman scattering (SERS) and fluorescent molecular bea
Autor:
Scott M. Norton, Michael J. Natan, Walter Stonas, Ian D. Walton, R. Griffith Freeman, Patrick C. Smith, Christine D. Keating, Brian D. Reiss
Publikováno v:
Journal of Electroanalytical Chemistry. 522:95-103
Fluorescent molecules are widely used as identification tags in both analytical and bioanalytical chemistry. This manuscript describes an electrochemical approach to the manufacture of submicron metal barcodes for application as identification tags.
Autor:
Lin He, Michael J. Natan, Christine D. Keating, Brian D. Reiss, R. Griffith Freeman, Sheila R. Nicewarner-Peña, David J. Peña, Remy Cromer, Ian D. Walton
Publikováno v:
Science. 294:137-141
We synthesized multimetal microrods intrinsically encoded with submicrometer stripes. Complex striping patterns are readily prepared by sequential electrochemical deposition of metal ions into templates with uniformly sized pores. The differential re
Publikováno v:
Inorganic Chemistry. 40:2298-2304
We have prepared ionic liquids by mixing either iron(II) chloride or iron(III) chloride with 1-butyl-3-methylimidazolium chloride (BMIC). Iron(II) chloride forms ionic liquids from a mole ratio of 1 FeCl(2)/3 BMIC to almost 1 FeCl(2)/1 BMIC. Both Ram
Publikováno v:
Journal of Raman Spectroscopy. 30:733-738
The effect of colloidal Au particle aggregation on surface-enhanced Raman scattering (SERS) spectra was probed by SERS filtration experiments. In this approach, SERS and optical spectra were recorded for trans-1,2-bis(4-pyridyl)ethylene (BPE)-aggrega
Autor:
R. Griffith Freeman, Katherine C. Grabar, and Michael A. Jackson, Michael J. Natan, Michael B. Hommer
Publikováno v:
The Journal of Physical Chemistry. 100:718-724
Ag-coated Au colloidal particles have been prepared by reduction of Ag+ in the presence of preformed Au colloids. The composition of the Au100-xAgx particles was varied from x = 0 to 80. SERS spectra of pyridine, p-nitroso-N,N‘-dimethylaniline (p-N
Publikováno v:
Analytical Chemistry. 67:735-743
The design and initial characterization of two-dimensional arrays of colloidal Au particles are reported. These surfaces are prepared by self-assembly of 12 nm diameter colloidal Au particles onto immobilized polymers having pendant functional groups
Autor:
R. Griffith Freeman, Nicholas Valley, Anne Isabelle Henry, Jeffrey M. McMahon, George C. Schatz, Marcelo Eduardo Piotti, Richard P. Van Duyne, Kristin L. Wustholz, Michael J. Natan
Publikováno v:
Journal of the American Chemical Society. 132(31)
Understanding the detailed relationship between nanoparticle structure and activity remains a significant challenge for the field of surface-enhanced Raman spectroscopy. To this end, the structural and optical properties of individual plasmonic nanoa