2 research outputs found
Unraveling the Mechanism of Tip-Enhanced Molecular Energy Transfer
Electronic Energy Transfer (EET) between chromophores is fundamental in many
natural light-harvesting complexes, serving as a critical step for solar energy
funneling in photosynthetic plants and bacteria. The complicated role of the
environment in mediating this process in natural architectures has been
addressed by recent scanning tunneling microscope (STM) experiments involving
EET between two molecules supported on a solid substrate [Cao, S. et al., Nat.
Chem. 2021, 13, 766-770]. These measurements demonstrated that EET in such
conditions has peculiar features, such as a steep dependence on the
donor-acceptor distance, reminiscent of a short-range mechanism more than of a
Forster-like process. By using state of the art hybrid ab initio
electromagnetic modeling, here we provide a comprehensive theoretical analysis
of tip-enhanced EET. In particular, we show that this process can be understood
as a complex interplay of electromagnetic-based molecular plasmonic processes,
whose result may effectively mimic short range effects. Therefore, the
established identification of an exponential decay with Dexter-like effects
does not hold for tip-enhanced EET, and accurate electromagnetic modeling is
needed to identify the EET mechanism
A behavioral database for masked form priming
Reading involves a process of matching an orthographic input with stored representations in lexical memory. The masked priming paradigm has become a standard tool for investigating this process. Use of existing results from this paradigm can be limited by the precision of the data and the need for cross-experiment comparisons that lack normal experimental controls. Here, we present a single, large, high-precision, multicondition experiment to address these problems. Over 1,000 participants from 14 sites responded to 840 trials involving 28 different types of orthographically related primes (e.g., castfe–CASTLE) in a lexical decision task, as well as completing measures of spelling and vocabulary. The data were indeed highly sensitive to differences between conditions: After correction for multiple comparisons, prime type condition differences of 2.90 ms and above reached significance at the 5% level. This article presents the method of data collection and preliminary findings from these data, which included replications of the most widely agreed-upon differences between prime types, further evidence for systematic individual differences in susceptibility to priming, and new evidence regarding lexical properties associated with a target word’s susceptibility to priming. These analyses will form a basis for the use of these data in quantitative model fitting and evaluation and for future exploration of these data that will inform and motivate new experiments