Single walled carbon nanotubes (SWNT) have excellent mechanical, electrical, and thermal properties but their manipulation is hampered since they do not readily dissolve in most organic solvents. In particular, the interaction of nanotubes and organics is not universally understood. Using UV−vis absorption and visible fluorescence spectroscopy we show that, in chloroform, the laser dye Rhodamine 101 (R101) forms ground-state complexes with CoMoCAT SWNT, but that in N,N-dimethylacetamide (DMA), no such complexes exist. We suggest a strong interaction between zwitterionic R101 and nanotube in chloroform where the interaction between nanotube and solvent is weak. We describe how this interaction is solvent specific and how R101 and its analogs may be used as an indicator of strength of interaction of solvent. We also suggest that charge transfer/dipole stabilization should be investigated further in the search for more stable and long lasting SWNT dispersions for improved nanotube manipulation.
Metastatic bone tumors to the hand are extremely rare. We present a case of metastatic prostate cancer to the right middle finger distal phalanx. To our knowledge, there is one other case of metastatic prostate cancer to the hand in the literature. In our case, a 59-year-old man with a history of widely metastatic prostate cancer presented to urgent care and was diagnosed with a nail plate avulsion injury. He was referred to hand surgery and treated with amputation of the right middle finger distal phalanx. The pathology reported high-grade poorly differentiated adenocarcinoma with primary lesion from the prostate.
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