Spectroscopic characterization of N2O aggregates: from clusters to the particulate state

Self-Diffusion in Core-Shell CompositeCO212/CO2Bauerecker1 2005Phys. Rev. Lett.254210View full textAdd to dashboardCite

“…On the other hand, they are suitable indicators of the order of state and the microscopic composition [3,22,23]. In our experiments additional spectral features, labeled with MP, occur a few wave numbers blueshifted from the combination-band peaks, resulting from CO 2 molecules embedded in an environment containing molecules of the other isotopomer, e.g., see arrow at the 1 3 band of 12 CO 2 , trace 3 to 12 in Fig.…”

“…3-has been frequently discussed [2,3,6,9,15,[23][24][25][26][27] and recently explained by shape evolution of the nanoparticles [3,16]. However, it remained an open question whether longish particles agglomerate from globular primary particles or if the globular primary particles themselves change to longish particles by dendritic growth [16].…”

Solid water clusters in the size range of tens–thousands of H2O: a combined computational/spectroscopic outlook

“…The spectra of other particles, such as of CO 2 [123,173,174] and SO 2 [175], are characterized by intense bands of dipole-coupled oscillations with the normal mode frequencies significantly shifted by surface charges induced by the oscillations. However, such spectra are largely uninformative of surface properties at the molecular level, though there may have been a breakthrough in this respect in recent studies of CO 2 clusters [176].…”

Physical Chemistry of Dust: Weak Intermolecular Interactions in Molecular Nanoparticles

“…A major difficulty is the generation of submicron particles in the lab with welldefined size distributions and that for different substances. For volatile substances, we use two methods, collisional cooling [4][5][6][7][8][9] and supersonic expansion [10] [11]. In both cases particles are formed directly from the gas phase by bringing a dilute sample gas to supersaturation.…”

“…In recent years we have systematically studied the infrared signatures of very weakly bound molecular aggregates, which are stable only under cryogenic conditions [4][5][10] [11][17] [18]. This includes solid particles consisting of water, carbon dioxide, ammonia, sulfur dioxide, and various composite particles.…”