Nano particulates Graphene found in Covid analytes.

Raman spectrum of graphene and graphene layers - PubMed (nih.gov)

Raman spectrum of graphene and graphene layers

image in article, one of many

• Author: A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, Michele Lazzeri, Francesco Mauri, S. Piscanec...

• Publish Year: 2006

Graphene is the two-dimensional building block for carbon allotropes of every other dimensionality. We show that its electronic structure is captured in its Raman spectrum that clearly evolves with the number of layers. ... A C Ferrari 1 , J C Meyer, V Scardaci, C Casiraghi, M Lazzeri, F Mauri, S Piscanec, D Jiang, K S Novoselov, S Roth, A K ...

https://pubmed.ncbi.nlm.nih.gov/17155573

FINAL_VERSIÓN_CAMPRA_REPORT_DETECTION_GRAPHENE_IN_COVID19_VACCINES.pdf

DETECTION OF GRAPHENE IN COVID19 VACCINES BY MICRO -RAMAN SPECTROSCOPY .. article title. for research nano particulate matter

The assignment of this band around 1450 cm - 1 is still pending, since it does not correspond to specific peaks in graphene, but we consider it to be of great importance for the knowledge of the composition of the samples due to the frequent appearance of this vibrational mode . As a working hypothesis, this band is usually assigned to organic methylene groups -CH 2 - by bending the pair of hydrogens - (scissoring). However, it has also been referred to as a band of moderate intensity associated with aromatic rings, and if so, it could also be associated with graphene (Ferrari and Robertson, 2004). As stated, another possible assignment of this band would be that of a superimposed vibrational mode of some compound other than graphene, more likely, or even of the hydrogel medium remaining after drying, as in all samples there is always a viscous residue remaining after drying at room temperature. This residue could in many cases be manifesting RAMAN vibrations overlapping with the objects that remain embedded in it, but not in those that appear outside the gel at the limits of the drying drag zone. In this sense, it is possible that this vibrational mode of the medium appears overlapped with the G and D peaks of graphene in the spectra of subgroup

• However, there are some substances capable of forming this hydrogel matrix whose RAMAN signals show prominent vibrational modes around this band, such as polyvinyl alcohol (PVA), methyl acrylamide, or the polymer PQT -12 (Mik Andersen, https://corona2inspect.blogspot.com/ pers. com). It is also a fact that some of these substances have been combined with graphene in experimental biomedicine designs that can be found in the scientific literature, for example artificial synapses for PQT -12 (Chen and Huang, 2020), gelatins for neuronal regeneration combining methyl acrylamide with graphene (Zhu et al, 2016) or PVA/GO electro spun fibers (Tan et al, 2016). Now, all these hypotheses about the assignment of this peak in the vicinity of 1450 cm - 1 remain open. In conclusion, out of a total of 110 scanned objects, unambiguous signals for the presence of graphene oxide have been found in ..see article.

Author: Mingyu Sang, Jongwoon Shin, Kiho Kim, Ki Jun Yu

Publish Year: 2019

DOI: 10.3390/nano9030374

Publication: Nanomaterials (Basel). 2019 Mar; 9(3): 374.

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