To: J.E.Currie who wrote (7497 ) 4/2/2002 12:47:38 PM From: Al Collard Respond to of 11802 BMD-v ...in the news:Birch Mountain discovers natural platinum nanoparticles Tue 2 Apr 2002 Mr. Douglas Rowe reports NATURAL PLATINUM NANOPARTICLES REPORTED BY BIRCH MOUNTAIN'S M ... Birch Mountain Resources has discovered natural platinum nanoparticles in sedimentary rock. The discovery was made by Birch Mountain scientists using a scanning transmission electron microscope (STEM) at the microscopy and imaging facility, department of cell biology and anatomy, faculty of medicine, University of Calgary. The platinum nanoparticles were found by STEM examination of a less than 100-nanometre thick, 20- by 24-micrometre cross-section cut from a platinum microparticle using a focused ion beam (FIB). The platinum microparticle was identified by environmental scanning electron microscope analysis of the rock. The location of the platinum microparticle on the sample mount was noted and the mount was sent to Fibics Inc., Ottawa, Ont., for preparation of the FIB section by the lift-out technique (www.fibics.com/MS_FIBTEMLiftout.html). STEM analysis of the FIB section shows that the platinum microparticle is a composite particle made up, in part, of successive bands of platinum up to 500 nanometres thick. The platinum bands are composed of laminae of 3- to 20-nanometre platinum nanoparticles and nanoparticle totals. Images of the platinum microparticle and nanoparticles are available on the company's Web site www.birchmountain.com. Birch Mountain initially hypothesized in 1999 that the precious and non-precious metal microparticles it and others had observed in sedimentary rocks were made up of much smaller nanoparticles. Evidence supporting this hypothesis was obtained in 2000, when Birch Mountain identified natural copper and iron-oxygen nanoparticles in sedimentary rocks. Subsequently, Birch Mountain's scientists have shown that some non-precious metal microparticles are totals of these smaller nanoparticles. The work reported here is consistent with Birch Mountain's hypothesis that precious metal microparticles can comprise totals of precious metal nanoparticles. These results show that platinum nanoparticles exist in nature and can total to form platinum microparticles. This disclosure should not be interpreted as scientific or technical information in respect of any exploration, development or production activities on any mineral property material to the company. These results do not imply, nor can they be used to infer, economic value. Birch Mountain will continue this work now that it has established the viability of the FIB section technique for examining natural microparticles and nanoparticles. Mr. Glen R. De Paoli, MSc, PGeo, senior project geologist, carried out or supervised the work described in this news and is identified as the qualified person.