Skyler Wheaton

Learn More
We use a double nanohole (DNH) optical tweezer with two trapping lasers beating to excite the vibrational modes of single-stranded DNA (ssDNA) fragments in the extremely high frequency range. We find the resonant vibration frequency of a 20 base ssDNA to be 40 GHz. We show that the change in the resonant frequency for different lengths of the DNA strand is(More)
Nanoaperture optical tweezers are emerging as useful label-free, free-solution tools for the detection and identification of biological molecules and their interactions at the single molecule level. Nanoaperture optical tweezers provide a low-cost, scalable, straight-forward, high-speed and highly sensitive (SNR ∼ 33) platform to observe real-time dynamics(More)
Multiplicities in ee annihilation and relativistic heavy ion collisions show remarkable similarities at high energies. A thermal-statistical model is proposed to explain the differences which occur mainly at low beam energies. Two different calculations are performed, one using an approximate thermodynamic relationship, the other using a full thermal model(More)
We trap a set of molecular weight standard globular proteins using a double nanohole optical trap. The root mean squared variation of the trapping laser transmission intensity gives a linear dependence with the molecular weight, showing the potential for analysis of globular proteins. The characteristic time of the autocorrelation of the trapping laser(More)
The recently discovered sharp peak in the excitation function of the K/π ratio around 30 A GeV in relativistic heavy-ion collisions is discussed in the framework of the Statistical Model. In this model, the freeze-out of an ideal hadron gas changes from a situation where baryons dominate to one with mainly mesons. This transition occurs at a temperature T =(More)
The final state in heavy-ion collisions has a higher degree of strangeness saturation than the one produced in collisions between elementary particles like p− p or p − p̄. A systematic analysis of this phenomenon is made for C − C, Si − Si and Pb−Pb collisions at the CERN SPS collider and for Au−Au collisions at RHIC and at AGS energies. Strangeness(More)
At present three distinct thermal model formalisms are implemented in THERMUS: the grand-canonical ensemble, in which baryon number (B), strangeness (S) and charge (Q) are conserved on average; a strangeness-canonical ensemble, in which strangeness is exactly conserved while B and Q are treated grand-canonically; and, finally, a fully canonical ensemble in(More)
The recently discovered sharp peak in the K/π ratio in relativistic heavy-ion collisions is discussed in the framework of the thermal model. In this model a rapid change is expected as the hadronic gas undergoes a transition from a baryondominated to a meson-dominated gas. The transition occurs at a temperature T = 140 MeV and baryon chemical potential μB =(More)