Transforming 2D nanosheets into the 1D rod structure has been proved possible with the aid of special treatment and exfoliation procedures. I advise you to check this article:
Tailored MoS2 nanorods: a simple microwave assisted synthesis by Reshmi et al.
I suggest you to have a look at the following, interesting papers:
-Counting graphene layers on glass via optical reflection microscopy
P. E. Gaskell, H. S. Skulason, C. Rodenchuk, and T. Szkopek
Appl. Phys. Lett. 94, 143101 (2009)
Available, as abstract, at: https://aip.scitation.org/doi/abs/10.1063/1.3115026
-Determination of the Number of Graphene Layers: Discrete Distribution of the Secondary Electron Intensity Derived from Individual Graphene Layers
Hidefumi Hiura, Hisao Miyazaki, and Kazuhito Tsukagoshi (2010)
Available at: https://arxiv.org/ftp/arxiv/papers/1008/1008.2039.pdf
-Graphene Synthesis, Catalysis with Transition Metals and Their Interactions by Laser Photolysis
Bonex Wakufwa Mwakikunga, K. T. Hillie
in book: Graphene – Synthesis, Characterization, Properties and ApplicationsEdition: 1Publisher: InTechEditors: Jian Ru Gong (2011)
Available, as complete paper, on RG at: https://www.researchgate.net/publication/215912280_Graphene_Synthesis_Catalysis_with_Transition_Metals_and_Their_Interactions_by_Laser_Photolysis/figures?lo=1
-How to optically count graphene layers
Sosan Cheon, Kenneth Kihm, Jae Sung Park, et al
Optics Letters 37(18):3765-7 (2012)
Available on RG at: https://www.researchgate.net/publication/232065981_How_to_optically_count_graphene_layers
-Modifying the electrical properties of graphene by reversible point-ripple formation
Mona M.M. Alyobi, Chris J.Barnett, PaulRees, Richard J.Cobley
Carbon, Volume 143, Pages 762-768 (2019)
Available at: https://www.sciencedirect.com/science/article/pii/S0008622318311096
-Production and processing of graphene and related materials
Claudia Backes, Amr M Abdelkader, Concepción Alonso, Amandine Andrieux-Ledier, Raul Arenal, Jon Azpeitia, Nilanthy Balakrishnan, Luca Banszerus, Julien Barjon, Ruben Bartali et al
2D Materials, Volume 7, Number 2 (2020)
Available at: https://iopscience.iop.org/article/10.1088/2053-1583/ab1e0a
Least but not last, probably the simplest method:
a method based on relative luminance is proposed for the rapid counting of layers in multilayer graphene. The number of graphene layers can be immediately identified by processing the acquired standard RGB images, once the one-time calibration of the entire optical system has been performed. he relative luminance method was successfully applied on both pristine and chemical vapor deposited graphene, regardless of the microscopes or even the substrates utilized, as long as there are some noticeable contrast differences.
Source:
-Rapid determination of the number of graphene layers by using relative luminance
Alexander E., Mag-isa, Choong-Kwang Lee, Sang-Min Kim, Jae-Hyun Kim, Chung-SeogO
Carbon, Volume 94, Pages 646-649 (2015)
Available, as abstract at: https://www.sciencedirect.com/science/article/abs/pii/S0008622315300737
Enjoy reading and best regards, Pierluigi Traverso