Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Dean G. Hafeman"'
Autor:
Dean G. Hafeman, Luc J. Bousse, Shahriar Mostarshed, Manuela Adami, Marco Sartore, Claudio Nicolini
Publikováno v:
Journal of Applied Physics. 75:4000-4008
Measurement of the ac photocurrent in metal/insulator/semiconductor capacitors can be used as a tool to measure minority‐carrier diffusion and lifetime. The amplitude of the ac photocurrent generated at a silicon surface biased into inversion depen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db7489af239c218a03421b1752de1afb
https://doi.org/10.1063/1.356022
https://doi.org/10.1063/1.356022
Publikováno v:
The Journal of Physical Chemistry. 97:3058-3066
A thermodynamic basis is derived and experimentally verified for predicting the temperature-dependent spectral changes in solutions containing a pH indicator and any number of pH-buffering components. Absorbance by the acidic and basic species of the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::805ede18f0da5f3a5c0493d0fe059c22
https://doi.org/10.1021/j100114a037
https://doi.org/10.1021/j100114a037
Publikováno v:
Sensors and Actuators B: Chemical. 10:67-71
A method is described which allows variations of surface potential and zeta potential at an insulator surface to be measured simultaneously. The samples consist of silicon nitride thin films deposited on silicon substrates. Light-addressable potentio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a62e5da27454e47b4f74811e5faca5a
https://doi.org/10.1016/0925-4005(92)80013-n
https://doi.org/10.1016/0925-4005(92)80013-n
Autor:
James B. Harkins, Benjamin B. Katz, Charles E. Witkowski, Peter Osucha, Salvador J. Pastor, Jeremy L. Norris, Dean G. Hafeman
Publikováno v:
Analytical chemistry. 80(8)
The preparation of complex biological samples for high-throughput mass spectrometric analyses remains a significant bottleneck, limiting advancement of the capabilities of mass spectrometry (MS) and ultimately limiting development of novel clinical a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::029662d06e9a460fa898771447efae49
https://pubmed.ncbi.nlm.nih.gov/18331003
https://pubmed.ncbi.nlm.nih.gov/18331003
Publikováno v:
Sensors and Actuators B: Chemical. 1:361-367
Insulators used as pH-sensing surfaces in field-effect sensors all show a greater or lesser amount of hysteresis and drift, and the magnitude of these two phenomena is usually correlated. We have found that after a pH step, a silicon nitride surface
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ad19a95f861f5caa9d11a8fa8d24d5c
https://doi.org/10.1016/0925-4005(90)80231-n
https://doi.org/10.1016/0925-4005(90)80231-n
Publikováno v:
Clinical Chemistry. 44:2206-2208
Pipettors and liquid handling systems should be checked regularly to verify their precision and accuracy. Professional organizations recommend performing 4-replicate tests monthly and 10-replicate tests at least quarterly (1)(2)(3)(4). Traditional gr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f7282031e6b1ad4ecf53fd9bface540b
https://doi.org/10.1093/clinchem/44.10.2206
https://doi.org/10.1093/clinchem/44.10.2206
Autor:
Nathan S. Lewis, James B. Harkins, Dean G. Hafeman, Thomas Thundat, Gilbert M. Brown, Robert J. Warmack, Charles E. Witkowski
We demonstrate the formation of charged molecular packets and their transport within optically created electrical force-field traps in a pH-buffered electrolyte. We call this process photoelectrophoretic localization and transport (PELT). The electro
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::227d4590beaa7755bc3a2d649a1d6033
https://resolver.caltech.edu/CaltechAUTHORS:HAFpnas06
https://resolver.caltech.edu/CaltechAUTHORS:HAFpnas06
Autor:
Dean G. Hafeman, Evelyn L. McGown
Publikováno v:
Analytical biochemistry. 258(1)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84000bece32cfc511bd2876f20f177a6
https://pubmed.ncbi.nlm.nih.gov/9527867
https://pubmed.ncbi.nlm.nih.gov/9527867
Autor:
Herking Song, Dean G. Hafeman
This chapter elaborates the redox systems for electrochemical detection of alkaline phosphatase, horseradish peroxidase, β-galactosidase, glucose oxidase, choline oxidase, and acetylcholine esterase. A high speed, sensitive electroanalytical system
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71a59fa8614d6791c8fc595d7e2d6d20
https://doi.org/10.1016/b978-1-85617-242-4.50092-6
https://doi.org/10.1016/b978-1-85617-242-4.50092-6
Publikováno v:
Science. 240:1182-1185
Numerous biochemical reactions can be measured potentiometrically through changes in pH, redox potential, or transmembrane potential. An alternating photocurrent through an electrolyte-insulator-semiconductor interface provides a highly sensitive mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::06ad0f7e898d6bbc2b42ad844c867d2f
https://doi.org/10.1126/science.3375810
https://doi.org/10.1126/science.3375810