Simon E Lappi

Works (22)

Updated: July 5th, 2023 16:00

2017 journal article

Intrinsic gain and gain degradation modulated by excitation pulse width in a semiconducting conjugated polymer

OPTICS AND LASER TECHNOLOGY, 94, 77–85.

By: Z. Lampert n, J. Papanikolas *, S. Lappi n & C. Reynolds  n

author keywords: Amplified spontaneous emission; Optical gain; Photo oxidation; Thermal degradation; Semiconducting conjugated polymer laser; Luminescence quenching; MEH-PPV
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7. Affordable and Clean Energy (Web of Science; OpenAlex)
Source: Web Of Science
Added: August 6, 2018

2014 journal article

Factors that influence properties of FOG deposits and their formation in sewer collection systems

WATER RESEARCH, 49, 92–102.

By: M. Iasmin n, L. Dean n, S. Lappi n & J. Ducoste n 

Contributors: M. Iasmin n, L. Dean n, S. Lappi n & J. Ducoste n 

author keywords: Fat, oil, and grease deposit; Sanitary sewer overflow (SSO); Calcium based fatty acid salts
MeSH headings : Calcium / analysis; Drainage, Sanitary; Fats / analysis; Fatty Acids / analysis; Hydrogen-Ion Concentration; Metals / analysis; Minerals / analysis; Oils / analysis; Rheology; Sewage / chemistry; Spectroscopy, Fourier Transform Infrared; Stress, Mechanical; Temperature
TL;DR: Calcium content in the calcium based salts seemed to depend on the solubility limit of the calcium source and influenced by pH and temperature conditions, which showed that selective removal of palmitic in pretreatment processes may be necessary prior to the discharge of FSE wastes into the sewer collection system. (via Semantic Scholar)
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Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2013 journal article

Intrinsic optical gain in thin films of a conjugated polymer under picosecond excitation

Applied Physics Letters, 103(3).

By: Z. Lampert, S. Lappi, J. Papanikolas & C. Reynolds

Source: NC State University Libraries
Added: August 6, 2018

2013 journal article

Mechanisms of Fat, Oil and Grease (FOG) deposit formation in sewer lines

WATER RESEARCH, 47(13), 4451–4459.

By: X. He n, F. Reyes  n, M. Leming n, L. Dean n, S. Lappi n & J. Ducoste n 

Contributors: X. He n, F. Reyes  n, M. Leming n, L. Dean n, S. Lappi n & J. Ducoste n 

author keywords: Sanitary sewer overflows (SSOs); Fat, Oil and Grease (FOG) deposits; Free fatty acids (FFAs); Calcium; FOG deposit formation; Sewer lines
MeSH headings : Calcium / analysis; Fats / analysis; Fatty Acids / analysis; Hydrogen-Ion Concentration; Oils / analysis; Sewage / chemistry; Spectroscopy, Fourier Transform Infrared; Surface Properties; Time Factors
TL;DR: Tests showed that calcium, the dominant metal in FOG deposits, can be released from concrete surfaces under low pH conditions and contribute to the formation process, and a comprehensive model was proposed for the mechanisms of FOG deposit formation in sewer systems. (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2013 journal article

Morphology and chain aggregation dependence of optical gain in thermally annealed films of the conjugated polymer poly[2-methoxy-5-(2 '-ethylhexyloxy)-p-phenylene vinylene]

Journal of Applied Physics, 113(23).

By: Z. Lampert, S. Lappi, J. Papanikolas, C. Reynolds & M. Aboelfotoh

Source: NC State University Libraries
Added: August 6, 2018

2011 journal article

Evidence for Fat, Oil, and Grease (FOG) Deposit Formation Mechanisms in Sewer Lines

ENVIRONMENTAL SCIENCE & TECHNOLOGY, 45(10), 4385–4391.

By: X. He n, M. Iasmin n, L. Dean n, S. Lappi n, J. Ducoste n  & F. Reyes  n

Contributors: X. He n, M. Iasmin n, L. Dean n, S. Lappi n, J. Ducoste n  & F. Reyes  n

MeSH headings : Dietary Fats / analysis; Drainage, Sanitary; Environmental Monitoring; Food Industry; Industrial Waste / analysis; Sewage / analysis; Sewage / chemistry; Spectroscopy, Fourier Transform Infrared; Water Pollutants, Chemical / analysis
TL;DR: It is proposed that the formation of FOG deposits occurs from the aggregation of excess calcium compressing the double layer of free fatty acid micelles and a saponification reaction between aggregated calcium and free fatty acids. (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, ORCID, NC State University Libraries
Added: August 6, 2018

2010 journal article

Physical Properties of AlGaN/GaN Heterostructures Grown on Vicinal Substrates

Journal of Electronic Materials, 39(5), 504–516.

By: J. Grenko n, C. Reynolds  n, D. Barlage  n, M. Johnson  n, S. Lappi n, C. Ebert*, E. Preble *, T. Paskova*, K. Evans*

author keywords: GaN; vicinal surfaces
Sources: Web Of Science, Crossref
Added: August 6, 2018

2008 journal article

Characterization of monolayer formation on aluminum-doped zinc oxide thin films

LANGMUIR, 24(2), 433–440.

By: C. Rhodes n, S. Lappi n, D. Fischer  n, S. Sambasivan n, J. Genzer n  & S. Franzen n 

MeSH headings : Aluminum / chemistry; Spectrum Analysis / methods; Zinc Oxide / chemistry
TL;DR: The characterization of the SAM deposition onto the AZO thin film reveals a range of possible applications for this conducting metal oxide. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2007 patent

Single pass attenuated total reflection fourier transform infrared microscopy apparatus and method for identifying protein secondary structure, surface charge and binding affinity

Washington, DC: U.S. Patent and Trademark Office.

By: S. Franzen  & S. Lappi

Source: NC State University Libraries
Added: August 6, 2018

2007 journal article

Study of the packing density and molecular orientation of bimolecular self-assembled monolayers of aromatic and aliphatic organosilanes on silica

LANGMUIR, 23(2), 673–683.

By: M. Smith n, K. Efimenko n , D. Fischer  n, S. Lappi n, P. Kilpatrick n & J. Genzer n 

TL;DR: These results demonstrate that whereas SAMs made of trichlorinated organosilanes are densely packed, SAMs prepared from monochlorinated species are less dense and poorly ordered. (via Semantic Scholar)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2006 journal article

Resonance Raman study of ferric heme adducts of dehaloperoxidase from Amphitrite ornata

BIOCHEMISTRY, 45(48), 14275–14284.

By: J. Belyea n, C. Belyea n, S. Lappi n & S. Franzen n 

MeSH headings : Animals; Heme / chemistry; Heme / metabolism; Hydrogen Bonding; Iron / chemistry; Iron / metabolism; Ligands; Models, Molecular; Molecular Conformation; Peroxidases / chemistry; Peroxidases / metabolism; Polychaeta / enzymology; Porphyrins / chemistry; Spectrum Analysis, Raman
TL;DR: The Raman data provide the first direct measurement of the effect of axial ligation on the heme iron in DHP, in which a strongly hydrogen-bonded backbone carbonyl (>C=O) polarizes the proximal histidine. (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2006 journal article

Testing Bridge-Mediated Differences in Dinuclear Valence Tautomeric Behavior

Inorganic Chemistry, 45(11), 4461–4467.

By: S. Bin-Salamon n, S. Brewer n, E. Depperman n, S. Franzen n , J. Kampf  n, M. Kirk  n, R. Kumar  n, S. Lappi n ...

TL;DR: The results highlight the necessity of studying both crystalline and amorphous samples to distinguish the effects of intrinsic electronic structure and intermolecular forces on valence tautomeric behavior. (via Semantic Scholar)
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Sources: Web Of Science, NC State University Libraries, Crossref
Added: August 6, 2018

2005 journal article

Supramolecular control of valence-tautomeric equilibrium on nanometer-scale gold clusters

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 127(15), 5328–5329.

By: S. Bin-Salamon n, S. Brewer n, S. Franzen n , D. Feldheim n, S. Lappi n & D. Shultz n 

TL;DR: The results show that surface confinement attenuates both DeltaH degrees and DeltaS degrees, and attribute these changes to a reduced accessible molecular surface area. (via Semantic Scholar)
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Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2004 journal article

Characterization of single- and double-stranded DNA on gold surfaces

LANGMUIR, 20(25), 11134–11140.

By: S. Moses n, S. Brewer n, L. Lowe n, S. Lappi n, L. Gilvey n, M. Sauthier n, R. Tenent n, D. Feldheim n, S. Franzen n 

MeSH headings : DNA / chemistry; Gold / chemistry; Surface Properties; Temperature; Time Factors
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Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2004 journal article

Covalent attachment of a nickel nitrilotriacetic acid group to a germanium attenuated total reflectance element

LANGMUIR, 20(4), 1184–1188.

By: B. Smith n, S. Lappi n, S. Brewer n, S. Dembowy n, J. Belyea n & S. Franzen n 

TL;DR: The surface of a germanium internal reflectance element (IRE) was modified to bind 6X-histidine (his)-tagged biomolecules and binding of his-tagged biotin to nickel nitrilotriacetic acid (Ni-NTA) was observed by ATR-FT-IR spectroscopy. (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2004 journal article

Efficiency and pattern of UV pulse laser-induced RNA-RNA cross-linking in the ribosome

NUCLEIC ACIDS RESEARCH, 32(4), 1518–1526.

By: T. Shapkina n, S. Lappi, S. Franzen  & P. Wollenzien

MeSH headings : Base Sequence; Escherichia coli / genetics; Lasers; Molecular Sequence Data; Photons; Purine Nucleosides / radiation effects; RNA, Ribosomal, 16S / chemistry; RNA, Ribosomal, 16S / radiation effects; Ribosomes / radiation effects; Ultraviolet Rays
TL;DR: Cross- linking frequencies obtained with one laser pulse are more correlated to internucleotide distances than arefrequency obtained with transilluminator irradiation, probably due to intensity-dependent photoreversal. (via Semantic Scholar)
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Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2004 journal article

Eigenvector mapping: a method for discerning solvent effects on vibrational spectra

Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy., 60(02-Jan), 357–370.

By: S. Lappi n & S. Franzen n 

MeSH headings : Adenine / chemistry; Hydrogen Bonding; Models, Molecular; Solvents; Spectrophotometry / methods; Spectrophotometry, Infrared / methods; Spectroscopy, Fourier Transform Infrared / methods; Spectrum Analysis, Raman / methods; Statistics as Topic / methods; Water / chemistry
TL;DR: The improvement in the fit between matrix isolation data and a model of adenine with a single water was not as dramatic as the fit seen for the polycrystalline data, but the fact that a single hydrogen-bonded water shifted the spectra of the model to a closer fit than that of isolatedAdenine is important. (via Semantic Scholar)
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13. Climate Action (Web of Science)
Sources: NC State University Libraries, NC State University Libraries
Added: August 6, 2018

2004 journal article

Infrared detection of a phenylboronic acid terminated alkane thiol monolayer on gold surfaces

LANGMUIR, 20(13), 5512–5520.

By: S. Brewer n, A. Allen n, S. Lappi n, T. Chasse n, K. Briggman  n, C. Gorman n , S. Franzen n 

Contributors: S. Brewer n, A. Allen n, S. Lappi n & . al.

MeSH headings : Alkanes / chemistry; Boron / chemistry; Boronic Acids / chemistry; Esters / chemistry; Gold / chemistry; Infrared Rays; Molecular Structure; Spectrophotometry, Infrared; Sulfhydryl Compounds / chemistry; Vibration
TL;DR: Polarization modulation infrared reflectance absorption spectroscopy and IRRAS have been used to characterize the formation of a self-assembled monolayer of N-(3-dihydroxyborylphenyl)-11-mercaptoundecanamide (abbreviated PBA) on a gold surface and the subsequent binding of various sugars to the PBA adlayer through the phenylboronic acid moiety to form aphenylboronate ester. (via Semantic Scholar)
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6. Clean Water and Sanitation (OpenAlex)
Sources: Web Of Science, NC State University Libraries, ORCID
Added: August 6, 2018

2004 journal article

Infrared spectra of (H2O)-O-16, (H2O)-O-18 and D2O in the liquid phase by single-pass attenuated total internal reflection spectroscopy

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 60(11), 2611–2619.

By: S. Lappi n, B. Smith n & S. Franzen n 

author keywords: IR; attenuated total reflection; (H2O)-O-16; (H2O)-O-18; (D2O)-O-16; density functional theory calculations
MeSH headings : Deuterium Oxide / chemistry; Oxygen Isotopes / chemistry; Spectroscopy, Fourier Transform Infrared; Water / chemistry
TL;DR: DFT calculation of the vibrational spectrum of liquid water was conducted on seven model systems and the nine-water PBC model was found to give a good fit to the experimental line shapes and a difference is observed in the broadening of the water bending and stretching vibrations indicative of a difference in the rate of pure dephasing. (via Semantic Scholar)
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7. Affordable and Clean Energy (OpenAlex)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2002 journal article

Center for Synchrotron Biosciences' U2B beamline: an international resource for biological infrared spectroscopy

JOURNAL OF SYNCHROTRON RADIATION, 9(2002 Jul), 189–197.

By: N. Marinkovic *, R. Huang *, P. Bromberg*, M. Sullivan *, J. Toomey*, L. Miller *, E. Sperber*, S. Moshe * ...

author keywords: infrared spectroscopy; microscopy; biological imaging; bone; protein folding; nucleic acid dynamics
MeSH headings : Bone and Bones / chemistry; Brain Mapping / instrumentation; Epilepsy / pathology; Hippocampus / chemistry; Humans; Osteoporosis / pathology; Purine Nucleosides / chemistry; Spectrophotometry, Infrared / instrumentation; Spectrophotometry, Infrared / methods; Synchrotrons / instrumentation; Temperature; X-Ray Diffraction / instrumentation
TL;DR: A number of synchrotron IR microscopy experiments that have been performed in the mid-IR spectral range, including time-resolved protein-folding studies in the microsecond time regime, IR imaging of neurons, bone and other biological tissues, as well as imaging of samples of interest in the chemical and environmental sciences are summarized. (via Semantic Scholar)
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13. Climate Action (Web of Science)
Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2002 journal article

Density functional analysis of anharmonic contributions to adenine matrix isolation spectra

JOURNAL OF PHYSICAL CHEMISTRY A, 106(47), 11446–11455.

By: S. Lappi n, W. Collier n & S. Franzen n 

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Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

2002 journal article

Detection of DNA hybridization on gold surfaces by polarization modulation infrared reflection absorption spectroscopy

LANGMUIR, 18(11), 4460–4464.

By: S. Brewer  n, S. Anthireya n, S. Lappi n, D. Drapcho n & S. Franzen n 

TL;DR: Polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS) was used to detect DNA hybridization on gold surfaces and contained absorptive features indicative of DNA arising from the phosphodiester backbone and the purine and pyrimidine rings. (via Semantic Scholar)
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Sources: Web Of Science, NC State University Libraries
Added: August 6, 2018

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